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  1. Home
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  3. 明和工業
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Water supply and drainage construction business
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明和工業

addressNiigata/Nishikan-ku, Niigata-shi/Dakeuchi 135-1
phone025-375-1000
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last updated:Aug 05, 2025
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明和工業 List of Products and Services

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Public works sector Public works sector
Control panel design and manufacturing Control panel design and manufacturing
Facility machinery maintenance Facility machinery maintenance
Renewable energy Renewable energy
Air valve Air valve
Construction and plant piping Construction and plant piping
Rental Rental
Disaster Management Series Disaster Management Series
Gas and water-related products Gas and water-related products
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Small Rapid Air Valve / MCV-G

[New Product] "MCV-G" Compact Rapid Air Valve with Multi-Purpose Features

MCV-G is lightweight and compact, allowing for easy and speedy connection of temporary pipes (REPCS G type)! It is a new small rapid air valve that incorporates versatility. It functions as an air valve under normal conditions and can be utilized for various purposes in emergencies. 【Features】 ■ Compatible with temporary pipes (REPCS G type) ■ Versatile functionality (can connect to fire hydrants and rescue taps using optional items) ■ Excellent exhaust capacity and fluid characteristics ■ High durability and superior quality: made of stainless steel *For more details, please refer to the catalog or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Are you struggling with "clogging" in agricultural water? [Latest video released☆]

More 'ease' on site. Meiwa Kogyo's agricultural air valves improve clogging issues and eliminate troubles, reducing the burden of work.

The agricultural air valve smart air valve is a high-performance air valve optimized for agricultural water. Generally used air valves for water supply systems face challenges in maintenance management due to malfunctioning intake and exhaust operations and poor shut-off caused by debris and sediment mixed in agricultural water. This agricultural air valve prevents the adhesion of debris mixed in agricultural water through a new structure that keeps the valve seat submerged, resolving issues of water leakage, malfunction, and poor shut-off. Furthermore, it significantly reduces maintenance costs. We have just released a new introduction video. Please check it out☆ 【Reasons for Choosing the Smart Air Valve】 ■ Unique structure prevents adhesion of debris and sediment, resolving water leakage and operational issues ■ Significantly reduces maintenance frequency ■ Made of corrosion-resistant stainless steel material to prevent functional failure due to corrosion ■ Compatible with various installation conditions such as water pipe bridges and buried sections 【Registered as Made in Niigata Gold Technology!】 This new technology has a proven track record among registered technologies and has been utilized in construction projects ordered by Niigata Prefecture and others, resulting in an evaluation by an expert committee that it is "more effective than conventional technologies."

  • Water and sewerage pipe fittings
  • Agricultural civil engineering works

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20% off campaign☆ Easy to use! Glow Joint

Turn it and click, connection complete! Are you familiar with stainless steel piping that thoroughly reduces labor on site? We have a wide range of sizes from 40A to 250A.

In response to the requests from many customers, we are expanding the campaign target area and period! We have prepared a "20% off the regular price" campaign exclusively for equipment construction companies that are adopting the Grojoint for the first time. ■ Application period: February 3, 2025 - End of February 2026 ■ Eligibility conditions: Projects that will begin delivery by the end of March 2026 (Ongoing projects and projects with confirmed adoption are not eligible for this campaign) ■ Limited conditions: Exclusively for equipment construction companies located in Hokkaido, Tohoku, Kyushu, Nagoya area (Aichi Prefecture, Gifu Prefecture, Mie Prefecture), and Kansai area (Osaka Prefecture, Kyoto Prefecture, Hyogo Prefecture, Nara Prefecture, Shiga Prefecture, Wakayama Prefecture) that are adopting Grojoint for the first time. Please take this opportunity to utilize the stainless steel piping "Grojoint 2.0MPa (250A is 1.0MPa)," which achieves excellent labor-saving for a wide range of applications such as industrial plants and high-rise buildings. We also have Grojoint 3.5 (3.5MPa specification) available.

  • Piping materials (copper pipes, cast iron pipes)
  • Piping and insulation

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Solar Cycle Port / Solaiyu Port

Everyday convenience, peace of mind in emergencies. — Solar Cycle Port —

The Solar Cycle Port is a solar charging station suitable for installation in stations, parks, public facilities, commercial facilities, and residential complexes, serving as a charging space for leisure activities and daily life. In emergencies, it can also function as a power supply station without relying on infrastructure. 【Features】 ■ Capable of charging electric mobility devices ■ Can utilize stored electricity during disasters ■ Does not require grid connection, allowing for flexible installation locations ■ Full package including modules and storage batteries 【Other Features】 ■ Increased power generation with double-sided panels ■ Always chargeable with built-in storage batteries ■ Efficient use of minimal space ■ Power status can be checked via computer or smartphone ■ Color selection available for orders of 10 or more units *For more details, please refer to the PDF document or feel free to contact us.

  • Car and bicycle parking facilities
  • Solar mounting brackets and fittings (solar fittings and protective sheets)

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Sustainable Machinery Equipment Service

From updating aging equipment to custom control panel manufacturing. We solve our customers' challenges that require sustainable machinery and equipment systems!

We provide services that ensure the continuous operation of various mechanical equipment, including pumps, peripheral equipment, and piping. 【Long-term Maintenance Service】  ■ Proposing truly necessary maintenance  ■ Material selection from a wide range of suppliers  ■ Manufacturing replacement parts at our domestic factory  ■ Low cost and long lifespan 【Control Panel Design and Manufacturing Service】  ■ Custom-made control panels  ■ Support for remote monitoring and operation systems using the cloud  ■ High quality from professionals with extensive experience and know-how  ■ One-stop service from removal of existing equipment to completion of installation

  • Power distribution and control panels
  • Renovation and repair methods

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REPCS Material Data H-Type

Introducing the dimension table and component list for materials used in the H type of REPCS!

The "REPCS Material Data H-Type" introduces materials used in stainless steel temporary piping systems. It includes dimension tables, component lists, and vehicle loading capacities for the housing type "H-Type." ■ REPCS H-Type: Housing Type - Recyclable - Safe and hygienic - Excellent workability - Economical - Nationwide service network - Stainless steel (SUS304) *For more details, please refer to the catalog or feel free to contact us.

  • Water and sewerage pipe fittings

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We have started a rental service for water pumps!

Would you like to rent a submersible pump along with REPCS materials? We have a wide range of pumping equipment tailored to meet your needs and piping routes.

We are pleased to announce that underwater pumps are now available for rent along with REPCS materials. (REPCS is a temporary piping rental system that considers the environment by minimizing waste.) Please feel free to use this service during droughts or when replacing installations.

  • Piping materials (copper pipes, cast iron pipes)

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High-performance expansion joint / Meiwa flange grooved joint

Adjusting pipe dimensions has never been easier. Perfect fit with high-performance expansion joints!

Meiwa Flange Grooved Joint allows for subtle dimensional adjustments during pipe installation, enhancing construction flexibility. Made from SUS304, it is a corrosion-resistant expansion joint that requires little maintenance. Additionally, it uses EPDM rubber, which is strong against heat and chemicals, as a packing material. It can be used for water supply systems, agricultural water, and industrial water piping. Point 1: Easy fine dimensional adjustments Point 2: Improved work efficiency with easy installation Point 3: Excellent corrosion resistance with stainless steel Point 4: High durability EPDM rubber ring *For more details, please refer to the PDF document or feel free to contact us.*

  • Water and sewerage pipe fittings
  • Piping Equipment

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Rental water tanks (1t) that are easy to store and manage after the usage period.

Plan to systematically deploy hygienic water through rental in necessary locations for the required duration using stainless steel rescue tanks (1 ton).

This rental water tank (1 ton) can be systematically deployed as an emergency water supply in preparation for natural disasters that have been occurring frequently in recent years, such as typhoons and heavy rain or snow, which pose isolation risks to residential areas, as well as for cleaning operations in homes affected by sediment flow. Additionally, it can be transported using a 1-ton truck or a van, and can be easily assembled in about 10 minutes, making it useful not only for disaster preparedness but also for delivering clean water to events planned in the community. Point 1: Assembly time is approximately 10 minutes Point 2: Lightweight design allows for movement by two people Point 3: Planned water stockpiling in preparation for natural disasters Point 4: Versatile uses for events and activities Point 5: Easy transportation to adjacent water supply stations Point 6: Hygienic stainless steel tank Point 7: Nationwide coverage through in-house production and shipping Point 8: Reliable one-stop service If you are considering permanent installation, you can purchase it at a more economical price. Please feel free to contact us.

  • others

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Control panel / operation panel

We provide custom-made control panels for water gates and pumping station facilities!

Professionals with extensive experience and know-how in facilities such as sluices, pumping stations, and control panels for pumps, valves, and sluices provide custom-made products tailored to meet customer needs. We offer consistent production from design to manufacturing, and we can also propose systems for control panels and operation panels. We realize products from a professional perspective on water infrastructure and respond to your requests. 【Features】 ■ We respond to requests with custom-made solutions ■ Manufactured by professionals with extensive experience and know-how ■ Supports remote monitoring and operation systems using the cloud

  • maintenance

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Ring rolling process

High pressure resistance and draw-in prevention are achieved through uniform ring processing without welding!

The rolling ring processing is a method of expanding a pipe into a ring shape. By performing the rolling process without welding the ring and the pipe, uniform ring processing becomes possible. It is compatible with the piping of connected water supply pipes made of stainless steel pipes. We produce in our factory and provide high-quality, uniform products. Please feel free to contact us when you need our services. 【Features】 ■ Uniform ring processing ■ Compatible with the piping of connected water supply pipes made of stainless steel ■ High pressure resistance ■ High pull-out resistance ■ Quality is stable as processing is done in our own factory ■ Made of stainless steel, excellent corrosion resistance, and environmentally friendly *For more details, please refer to the PDF document or feel free to contact us.

  • Piping Equipment

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Disaster Emergency Water Tank / Rescue Tank

Assembly in 10 minutes! Enables quick distribution of emergency water during disasters.

The rescue tank is made of stainless steel, making it hygienic and easy to manage after use! It can be transported by a 1-ton truck or a van and can be moved by two adults (before filling with water). It can be used at water supply points and with water supply vehicles. Additionally, by attaching the rescue tap (water supply faucet) to the assembled body, it allows for supply from one water inlet to four faucets (up to eight faucets maximum). Assembly takes only 10 minutes! It quickly secures the city's lifeline. 【Features】 - Stainless steel construction keeps drinking water hygienic - Easy assembly - Easy connection - Transportable by 1-ton truck or van *For more details, please refer to the PDF or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Groove Joint Series / Glow Socket

Space-saving construction has further improved! Piping for sizes up to 80A can be done by hand.

Introducing the Glow Socket from our Grooved Joint Series! Available in sizes ranging from 40A to 125A, the installation efficiency in compact spaces has been further improved. For sizes 80A and below, piping can be done by hand, while for sizes 65A and above, we have jigs available. Please feel free to contact us when you need assistance. 【Product Lineup】 ■40A ■50A ■65A ■80A ■100A ■125A *For more details, please refer to the PDF document or feel free to contact us.

  • Water and sewerage pipe fittings

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Stainless steel prefabricated processing pipe

We support various processing methods such as flange processing and roll grooving! We propose shapes suitable for your application.

The "stainless prefabricated processing pipe" is made of stainless steel with excellent corrosion resistance, lightweight, and offers superior workability on site. It can be used for a wide range of applications, including building equipment piping, plant piping, and water supply and drainage piping. Since all components are produced in our factory, we can accommodate requests for custom processing, and we provide high-quality and uniform products through rigorous inspection. Please feel free to contact us when you need our services. 【Features】 ■ Reduces labor hours for construction, shortening the construction period ■ On-site work is easier and faster compared to on-site processing ■ Savings on fittings through branching processing (including small diameters) ■ Quality is stable because processing is done in the factory ■ Piping that is environmentally friendly with excellent corrosion resistance *For more details, please refer to the PDF materials or feel free to contact us.

  • Piping Equipment

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Cyclic Hybrid Blast System ☆NETIS Registered☆

Reduce industrial waste! Achieve a sustainable infrastructure maintenance cycle.

When painting an object, a major factor that contributes to the long-term retention of the paint film is "substrate preparation." The circulating hybrid blast system method is an environmentally conscious blasting technique that enables significant reduction of industrial waste by recycling (reusing) the abrasive materials used in substrate preparation blasting. Meiwa Industry has become a regular member of the Japan Circulating Hybrid Blast System Association and has introduced this system, which is registered as NETIS VE (Utilization Promotion Technology), to start an eco-friendly and reusable blasting business. 【Features】 ■ Significant reduction of industrial waste and CO2 emissions by circulating and repeatedly projecting abrasive materials ■ Use of steel grit as the abrasive material ■ Efficient removal of paint films containing harmful substances such as lead, PCB, and chromium ■ Electronic control system with excellent safety and operability ■ Type-3 with excellent mobility that can be mounted on a 4-ton truck ■ High safety and reduced number of specialized workers *For more details, please refer to the related links or feel free to contact us.

  • Bridge Construction

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Portable Energy Storage System Series

For emergency power supply during disasters. Products equipped with UPS functionality are also available. They are effective at disaster response centers and evacuation shelters.

Our company offers a lineup of "portable power storage systems" suitable for preparing for power outages during disasters such as earthquakes and typhoons. We provide products equipped with UPS functionality that can detect power outages and start supplying power, as well as products suitable for large evacuation centers due to their high capacity and output, and products that allow the use of electrical devices by connecting to a vehicle. Currently, we are distributing materials that summarize information about each product. You can view detailed content through the "PDF download." 【Lineup】 ◎ '1.6kWh Model' ■ Available with an option for solar charging functionality ■ Equipped with a 1,560Wh Li-ion battery (made in Japan) ◎ '3.1kWh Model' ■ Supports high capacity of 3100Wh and high output of 2100W ■ Fast charging capability: approximately 3 hours ◎ 'Vehicle Connection Power Supply' ■ Usable without tools ■ Comes with a cable that supports a large current of 100A *For more details, please refer to the materials. Feel free to contact us with any inquiries.

  • Other Batteries

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Portable energy storage system / Vehicle-connected power supply

A portable power source that can be connected to a car to use electrical appliances. Great for emergencies and work! Easy to use in 4 simple steps!

The vehicle-connected power supply of the portable storage battery system allows you to connect to a car and use electrical products such as POS terminals and LED lighting, making it useful during emergencies and work situations. It can utilize power from an outlet (AC100V) and can be used up to a maximum of 1,000W. Additionally, it comes with a cable that supports a large current of 100A, which can be stored inside the case. We offer a 12V/24V compatible model "MEB-C1224-Y/B" and a 48V model for electric forklifts "MEB-C48-Y/B." 【Features】 ■ Usable without tools ■ Supports two types of battery voltages ■ Comes with a cable that supports a large current of 100A *Can be stored inside the case ■ Equipped with safety and protection features *For more details, please refer to the PDF document or feel free to contact us.

  • DC Power Supply

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Portable energy storage system / 3.1kWh model

Large-capacity portable storage battery. Prepared for disaster response and power outage measures. Suitable for indoor work as a replacement for generator sets!

The portable storage system 3.1kWh model is a backup power source suitable for replacing generator sets and for large-scale evacuation shelters with high capacity and output. It also supports equipment that requires startup power. It can charge about 360 smartphones, and can back up a desktop PC for approximately 69 hours, with cutting machines and disc grinders operating at 1,430W. 【Features】 ■ Large capacity of 3,100Wh ■ High output of 2,100W, maximum 3,900W (at 25°C for 5 seconds, power factor 1) ■ Fast charging support: approximately 3 hours ■ Effective capacity of 2,800Wh (90%) ■ No soundproofing required *For more details, please refer to the PDF document or feel free to contact us.

  • DC Power Supply

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Portable energy storage system / 1.6kWh model

Portable storage battery with UPS functionality! Prepared for disaster response and power outage measures. Standard model and model with solar charging function available!

The portable power supply system 1.6kWh model is an all-around portable power source suitable for emergencies and outdoor activities. When charging, the UPS function activates with the AC output switch ON. It detects power outages and starts supplying power from the battery within 10 milliseconds. The color variations include two colors: black and yellow, and it is easy to carry with its carrying case design. 【Features】 ■ Standard UPS function (always commercial mode) ■ Equipped with a 1,560Wh Li-ion battery (made in Japan) ■ High-efficiency inverter with a total output of 1,400Wh (at rated output at 25°C) ■ High output with a rated output of 1,000W (power factor 1) and a maximum output of 2,500W (at 25°C for 3 seconds, power factor 1) ■ Easy to carry with a carrying case design ■ Can also be charged from solar panels. * Solar charging model available (solar panels sold separately) * For more details, please refer to the PDF document or feel free to contact us.

  • DC Power Supply

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Facility machinery maintenance

Leave the maintenance of pumps and surrounding equipment and piping in the drainage airport to us! We will meet your needs with our technical expertise.

This is a maintenance service for surrounding equipment and piping, including pumps at the drainage airport. We will carry out maintenance or replacement of surrounding equipment and piping, and propose maintenance methods tailored to the situation, from planned maintenance during the off-season to emergency maintenance just before irrigation. We will select suitable maintenance methods from the perspective of low cost and long service life. 【Features】 ■ Exchange and modification of only the minimum necessary parts ■ In-house production of parts ■ Selection of materials from a wide range of suppliers ■ Low cost and long service life *For more details, please refer to the PDF document or feel free to contact us.

  • maintenance

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Stainless Steel Temporary Piping System / REPCS

Are you having trouble with the renewal and maintenance of existing pipelines? We offer total support as a temporary piping rental service, from construction methods to technical assistance!

The stainless steel temporary piping system REPCS is a rental service for temporary piping that can be utilized for the relocation of water pipes during water supply pipe renewal work and sewer pipe renewal work without requiring a water outage, ensuring a "safe and secure" water supply. It allows for the rental of the necessary amount for the required period during water and sewage construction work and restoration work during disasters, making it environmentally friendly and economically advantageous. In times of disaster, we leverage our past experiences to provide rapid water supply to affected areas and contribute to the restoration of water pipes after disasters. Additionally, we use our patented Grooved Joint System, which allows for easy pipe connections by simply inserting and twisting, making it easy for anyone to install. We offer a "G type" for quick installation in three steps and a standard "H type." This service, uniquely devised by our company, started in 1989 and is now adopted by over 85% of municipalities nationwide, from Hokkaido to Kyushu. 【Five Key Points】 ■ Easy joining ■ Built-in disengagement prevention mechanism ■ Excellent pressure resistance ■ Reliable safety ■ Smooth shipping response for peace of mind at any time

  • Water and sewerage pipe fittings

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Water pipe bridge, bridge-mounted pipes, coated steel pipes for water transport, steel-shaped pipes.

A bridge of evolution that connects to the future! Meiwa Kogyo's water pipe bridge is a completely custom-made prefabricated system water pipe bridge!

We offer a comprehensive system from on-site investigation to proposal, design, manufacturing, insulation, painting, construction, and after-sales service, providing a wide variety of options to meet all needs and scenarios. We manufacture according to application, including water pipe bridges such as standalone bridges and bridge-mounted pipes, as well as coated steel pipes for water transportation, pressure iron pipes, on-site piping, buried pipes, pipe-in-pipe systems, and river crossing pipes. **Features of Water Pipe Bridges** - The main pipe can be selected from stainless steel pipes, steel pipes, polyethylene pipes, and others. - We offer a variety of options including various coatings, FRP corrosion protection, and insulation work. - Our full-order system allows for customization according to specifications and applications. **Meiwa Pipeline Renewal System M-PLUS** - Camera inspection (non-water pipe internal camera inspection) - Pipe cleaning (SCOPE method "special cleaning method for water pipes" and HS method "high-speed carbonated water cleaning method") - Renewal method (SDF method) - Rehabilitation method (hose lining method, Paltem HL method, etc.) - Temporary piping (REPCS) **Water Pipe Bridge Diagnosis Service** - Water pipe bridge diagnosis service (deterioration diagnosis, seismic diagnosis) *For more details, please refer to the external link page or feel free to contact us.*

  • Piping materials (copper pipes, cast iron pipes)

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Non-freezing rapid type air valve / Airis Neo

Solve the freezing problem! Our high-quality air valve with a secondary valve function ensures stable water flow in the piping.

The Aeris Neo is a freeze-proof type that utilizes the flowing water energy of the main pipe and is a freeze-proof rapid air valve that maintains a stable water flow within the piping. It features a flat and slim compact design that accommodates various installation conditions. Made of stainless steel and plastic, it excels in corrosion resistance and toughness. Additionally, the auxiliary valve that stops the water flow within the valve adopts a new mechanism, significantly improving workability and safety during inspection and cleaning. 【Features】 ■ Compact body that does not compromise aesthetics ■ Special structure with auxiliary valve function ■ Freeze-proof structure ■ High durability ■ Excellent intake and exhaust function *For more details, please refer to the catalog or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Emergency Water Supply Faucet Set / Rescue Tap

A simple water supply station that everyone can use! Made of safe and secure stainless steel.

The Rescue Tap is an emergency water supply set that allows for easy and rapid water supply by attaching the main unit assembled at a water supply point. In the event of disasters such as earthquakes that damage water supply facilities, it can quickly provide safe and high-quality water. It connects easily by simply inserting and turning, and assembly is completed in about 3 minutes. It quickly secures the lifelines of the community. 【Features】 ■ Quickly supplies high-quality water ■ Easy assembly ■ Simple connection ■ Connection ports can be customized *For more details, please refer to the catalog or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Agricultural Air Valve / Smart Air Valve

Solving the problem of waste in agricultural water! Adopting a structure that resolves malfunctions. Contributes to smooth water flow and rapid filling and draining with the high durability of SUS304.

★Certified with Niigata Gold Technology★ The agricultural air valve Smart Air Valve is an air valve installed in agricultural pipelines to ensure smooth water flow and rapid filling and draining. Commonly used air valves for water supply often face issues such as malfunctioning due to debris and sand contamination in agricultural water, leading to challenges in maintenance and management. Meiwa Industry's agricultural air valve adopts a structure that resolves these operational failures while maintaining excellent air intake and exhaust performance. 【Features】 Point 1: Prevents the adhesion of debris and sediment mixed in agricultural water, eliminating leaks and operational failures. Point 2: Reduces maintenance frequency, saving time and labor. Point 3: Made of highly corrosion-resistant stainless steel material to prevent functional failure due to corrosion. Point 4: Compatible with various installation conditions, such as water pipe bridges and buried sections. *For more details, please refer to the PDF document or feel free to contact us.*

  • Piping materials (copper pipes, cast iron pipes)

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One-touch mechanical architectural piping system / Grooved joint

Simple and speedy. A piping system that achieves outstanding labor savings.

Meiwa Kogyo's Grooved Joint is a one-touch mechanical joint system that integrates stainless steel pipes and fittings, suitable for a wide range of applications including building equipment piping, fire protection equipment piping, piping for various plant devices, and water supply and drainage piping. The one-touch design allows for speedy installation without the need for specialized piping techniques, enabling labor-saving and manpower-reducing measures on site. Additionally, since it uses stainless steel, there is no occurrence of red water, ensuring excellent piping quality and hygiene. It has also obtained fire protection certification, making it suitable for use in fire protection equipment connection water supply pipes. ☆ Benefits of the Grooved Joint ☆ Point 1 [No Expertise Required] There is no difference in sealing performance regardless of who performs the installation. The installation can be confirmed with the stopper attachment. Point 2 [Easy Installation] Simply insert the spigot into the socket and rotate to complete the installation. No tools are required for sizes up to 100A, allowing for manual installation. Point 3 [Cost Reduction] By shortening installation time, installation costs can be significantly reduced. It is also possible to shift from skilled workers to general workers.

  • Fire extinguishing equipment

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Custom-made water supply truck / Water supply tower

Achieving storage capability with 360° rotation - Water supply tower for filling water into water supply vehicles.

This product is a custom-made water supply tower for water supply vehicles, utilizing expertise in water pipe bridges and temporary piping. The piping can rotate 360 degrees and has excellent storage capabilities, enabling flexible and smart water supply. Additionally, by providing two water supply outlets, simultaneous water supply to two vehicles is possible (buried pipe connection model), allowing for time savings and compatibility with various water supply vehicles. 【Features】 ■ Made of all stainless steel ■ Customization available ■ Two water supply outlets (buried pipe connection model) ■ Rotatable and movable *For more details, please refer to the PDF document or feel free to contact us.

  • Water supply facilities

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MG Series / Gas Water Extractor

Quickly identify trouble spots! Introducing the Meiwa-style gas water extractor.

The gas water separator from Meiwa Kogyo is divided into two sections inside, allowing for the identification of the faulty area by checking the left and right sides. By installing the water separator at a low point in the piping, if a pipe is damaged, water will flow from the damaged area to the lower part of the pipe and enter the water separator, enabling the identification of which pipe has the fault. 【Features】 ■ The interior of the water separator is divided into left and right sections, allowing for the identification of the faulty area by checking both sides. ■ It can identify which pipe has the fault. ■ Utility model has been obtained. *For more details, please refer to the PDF document or feel free to contact us.

  • Water Treatment Plant

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【With maintenance guide】Frost-proof rapid air valve 'Airis Neo'

This is an air valve that protects stable water flow in pipes with high quality born from the pursuit of functionality and rationality!

"Aeris Neo" is a non-freezing type that utilizes the flowing water energy of the main pipe, and it is an air valve that maintains a stable water flow within the piping. We have now published a video for maintenance! It adopts the "rotating slide method," which is a major feature of Aeris Neo. This method does not require special tools, making maintenance easier and allowing for safe work by simultaneously sealing the side and bottom holes. We have created a "Maintenance Guide" detailing maintenance precautions and procedures! For more information, please download the materials or feel free to contact us if you have any questions. [Aeris Neo Features] ■ Easy maintenance with the rotating slide method that does not require special tools ■ Optional parts are also available separately ■ Special structure with a sub-valve function and non-freezing design *For more details, please refer to the catalog or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Rental temporary piping system / Repix

Eco-friendly reuse concept! We provide total support with abundant materials and a network.

Meiwa Kogyo's rental temporary piping system REPCS (Repix) is a piping system designed with consideration for the environment, ensuring no waste materials are produced. With a simple structure that integrates pipes and fittings, it significantly reduces construction time. Since no complex tools are required, anyone can easily and safely install it. This is a material rental service necessary for temporary construction, including water supply pipes, hot water pipes, and chilled/hot water pipes for building equipment. 【Features】 ■ Easy installation ■ Shortened construction period ■ Abundant materials ■ Safe and secure ■ Environmentally conscious reuse concept *For more details, please refer to the PDF document or feel free to contact us.

  • Water and sewerage pipe fittings

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REPCS Material Data Type G/H

Introducing the dimension table, component list, and optional materials used in REPCS!

The "REPCS Material Data G Type/H Type" introduces materials used in stainless steel temporary piping systems. It includes dimension tables, component lists, vehicle loading capacities, etc., for the glow type "G Type" and the housing type "H Type." [Contents] ■ G Type Material Section ■ H Type Material Section ■ Optional Material Section (common to G Type and H Type) ■ Technical Section *For more details, please refer to the catalog or feel free to contact us.

  • Water and sewerage pipe fittings

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Stainless Steel Expandable Joint / MS Joint

High-performance expandable joints developed by stainless steel processing experts!

The MS Joint by Meiwa Kogyo is a stretch joint that is resistant to corrosion and requires little maintenance, thanks to the use of SUS304 and SUS316. Its durability is nearly permanent compared to iron. The long stretch pipe smoothly absorbs the expansion and contraction of the main pipe, and its flexibility can withstand bends of 3 to 5 degrees, demonstrating its effectiveness in response to environmental changes after installation. Additionally, CR rubber, which is strong against chemicals, is used as a packing material. It can be widely utilized in various applications, including drinking water supply, agricultural water, industrial water piping, and sewage systems. 【Features】 ■ Completely shuts out corrosion ■ High stretch performance ■ CR rubber ring suitable for sewage systems ■ Four types available to choose from based on the diameter of the main pipe and site conditions *For more details, please refer to the catalog or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Strainer / Glow Bucket Strainer

Significant reduction in cleaning and inspection efforts! Maintenance can be done without tools.

The Glow Bucket Strainer is a groundbreaking strainer that maximizes the performance of our "Glow Joint." During open cleaning or inspection, it allows for the removal of the upper cover without any need for bolt and nut tightening, enabling one-touch operation. Maintenance can be performed without tools for body diameters up to 150A. The product weight has been reduced to about one-third compared to conventional flange types, making it easier to handle. 【Features】 ■ Easy and safe cleaning and inspection ■ One-touch removal of the upper cover ■ Cover attachment and detachment time is less than about 1/10 compared to flange types ■ Lightweight and compact ■ Customizable spacing dimensions and filtration area ■ Safe and easy operation by performing open work from the top *For more details, please refer to the external link page or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)
  • Piping and insulation

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Glow Bucket Strainer

Significantly reduces the effort required for cleaning and inspection compared to conventional bucket strainers!

The Glow Bucket Strainer is a product that allows for easy and safe cleaning and inspection. When opening the upper cover, there is no need for any bolt or nut tightening work; the upper cover can be removed with a single touch. Maintenance can be performed without tools for body diameters up to 150A. The product weight has been reduced to about one-third compared to conventional flange types, making it easier to handle. Since the face-to-face dimensions and filtration area can be customized, it can be replaced in existing spaces. 【Features】 ■ Easy and safe cleaning and inspection ■ Upper cover can be removed with a single touch ■ Safety is ensured during opening operations from above ■ Lightweight and compact ■ Face-to-face dimensions and filtration area can be customized *For more details, please refer to the PDF document or feel free to contact us.

  • Piping materials (copper pipes, cast iron pipes)

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Emergency Drinking Water Storage Tank / Safety Tower

40 tons of drinking water stored hygienically! A tank that can supply safe water in emergencies.

The Safety Tower is a water storage tank that can hold safe drinking water during disasters and emergencies. With a capacity of 40 tons, it can provide approximately 10,000 people with 4 liters of water each. Its robust structure boasts excellent earthquake resistance, having withstood the Niigata Prefecture Chuetsu Earthquake and the Great East Japan Earthquake, serving as both a drinking water tank and a fire-fighting water tank. Designed to save space, it can be placed in various locations. The design, which can be tailored to match local specialties and community aesthetics, has received positive feedback. 【Features】 - Stainless steel used in the internal structure - Water quality comparable to tap water through chlorine agents and membrane filtration - Space-saving design - Usable as fire-fighting water - Technology for maintaining clean water has been patented *For more details, please refer to the catalog or feel free to contact us.

  • Disaster prevention supplies

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