List of 管 products
226～270 item / All 6626 items
Design support that covers a wide range from overview diagrams to hydraulic calculation reports. Performance materials are currently available.
- Water effects and aquariums
- Garden stones, sculptures, fountains, ponds
High-density polyethylene pedestrian passage (pedestrian opening) "EP-Sleeve" - Lightweight, high strength, and a proposal for labor-saving! [Coming soon]
- Formwork material
- Frame construction accessories
- Piping materials (plastic pipes)
Production will start" Polyethylene sleeve / access hole (access port) "EP-Sleeve
Polyethylene Human Passage (Human Passage Opening) EP-Sleeve ■ High Pressure Resistance: Due to its smooth double structure with a corrugated inner surface, it is strong against impacts and external pressure, possessing excellent flat strength. ■ Lightweight Material: Compared to rigid PVC pipes, it is lightweight. It enhances transportation and work efficiency, contributing to "labor-saving" at construction sites. ■ Rust Resistant: Made of high-density polyethylene, it is safe and secure for installation in water areas! ■ Cold and Chemical Resistant: Compared to rigid PVC pipes, it is suitable for installation in extremely cold regions and shows no deterioration against most chemicals. The polyethylene sleeve "accelerates the 'efficiency' of the site with its 'lightweight'!" A material that combines high pressure strength with "lightweight," which leads to direct construction usability. In particular, while rigid PVC pipes weigh about 53 kg/m, the polyethylene sleeve weighs about 17 kg/m, showcasing an overwhelming weight difference! We guarantee a definite improvement in work efficiency at construction sites. Furthermore, it also contributes to reducing the burden on workers and lowering accident risks, enhancing safety!
Effective as safety measures under the Water Pollution Prevention Act! Products that can respond to environmental conservation measures are listed.
- Drainage and ventilation equipment
- Piping Equipment
Cleansing machine that does not damage pipes, deodorizes and antibacterial! Environmentally friendly cleaning agent made from natural materials.
- others
- Building Cleaning Equipment
A trading company that connects building material manufacturers and contractors!
- Other commercial buildings and service facilities
Are you having trouble with poor drainage due to gravel or root blockage? Our special structure significantly improves drainage efficiency compared to regular pipes!
- Sanitary fixtures
2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.
The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.
Flexible hoses and bellows-type expansion joints absorb significant movements of large piping caused by earthquakes and ground subsidence, preventing damage to equipment and piping!
- Piping Equipment
- Fittings
- Water and sewerage pipe fittings
Realization of labor-saving and paperless operations for gas buried pipe inquiries.
- Data Entry
Suitable for underground buried pipes! A large-diameter PF single-layer corrugated pipe that combines excellent workability and cost-effectiveness.
- Piping materials (plastic pipes)
The distance can be set in three stages from 250mm to 350mm! Prevents a decrease in power transmission efficiency due to cable heating.
- Piping and electrical wiring materials
Launched the industry's first adjustable spacer developed for "SFVP" power cable protection tubes.
Kokugawa Electric Co., Ltd. will launch the industry's first adjustable spacer, which allows for three different settings of separation distance, developed for the "SFVP" power cable protection tube suitable for underground transmission of renewable energy, starting from May 30, 2025. This adjustable spacer can set the separation distance from 250mm to 350mm in three stages, allowing for adjustments to avoid unexpected obstacles during construction. Additionally, by ensuring an appropriate separation distance between the protection tubes, it can prevent issues such as cable outages and reduced transmission efficiency due to cable overheating.
Fittings for different types of pipes with varying outer diameters.
- Piping Equipment
Please leave the design and manufacturing of the water-oil insulation tube to prevent insulation breakdown at the cable termination during the insulation breakdown test of the removed CV cable to us!
- Power and Energy Equipment
- Electrical Equipment Testing
- Analysis and prediction system
Cross-linked polyethylene pipes, including those for water supply, are products that conform to JIS standards!
- Piping Equipment
- Unit and other construction
We offer a wide range of welded pipe fittings for air conditioning equipment piping, available in various sizes and wall thicknesses. [Same-day shipping for in-stock items is also possible.]
- Fittings
Non-destructive testing that does not create holes in floors or walls is possible! Resin pipes such as CD pipes are clearly displayed! We conduct exploration with the knowledge and technical skills un...
- Other measuring instruments
- Surveying Consulting
No special work is required during piping installation! Easily connect various types of pipes (different types) with a short wrench. You can view construction examples by downloading.
- Water and sewerage pipe fittings
- Tile work
Improving drainage around parks, grounds, and residential areas! Prevents clogging caused by sediment and foreign objects, achieving high drainage performance. [Case study collection available]
- Drainage and ventilation equipment
2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.
The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.
[Volume 8!] A large number of case studies on buried piping and indoor piping, along with user testimonials! Packed with photos for easy visualization.
- Fittings
Completion of the 2020 edition of "Case Studies and Construction Method Proposals for Useful Pipe Fittings in Architectural Equipment Piping"!
The 2020 version of our delivery case study materials for pipe fittings, which have received great acclaim every year, has been completed. We clearly introduce specific usage methods in buried piping, indoor piping, and temporary piping in building facilities, along with user feedback and photos. If you're interested, please feel free to download it!
A variety of sizes are available! Since it's a long length (roll), there are fewer connection points needed.
- Piping materials (plastic pipes)
Promoting the underground installation of cables! Introducing a series of flexible conduit materials for electric wire cables.
- Piping and electrical wiring materials
Design of expansion joint fittings, installation of expansion joint fittings, SI unit conversion rate table, pipe elongation table, etc.
- Water and sewerage pipe fittings
Thorough prevention of harmful substances and liquid leakage! A double pipe fitting that allows visual inspection with a transparent pipe.
- Drainage and ventilation equipment
Less metal fatigue means it lasts longer! Prevents screw seizing and galling!
- Gas equipment
- Piping Equipment
Seismic design in the longitudinal direction of buried pipes will be conducted for both the main and auxiliary pipes.
- Architectural Design Software
Ball defense guard, please take a look!
- Piping Equipment
A mechanical joint that achieves seismic performance and resistance to pipe disconnection! 'Strub Grip GX Type'
- Fittings
At Benkan Kiko, we can handle the materials and challenging thick-walled plastic processing required for thermal power plants!
- Railway Construction
- Prefab
- stone
Lightweight and durable! Steel pipes that achieve low cost and short delivery times.
- Road facilities
The double tube form is a structure that incorporates a water pipe within the sheath pipe! It is used as an outer pipe when insulation is required.
- Bridge Materials
- Bridge Construction
- Pipeline Construction
We provide butt-welded pipe fittings that meet customer needs, ranging from general-purpose specifications for standard construction to specialized specifications for unique plants.
- Water Treatment
- stone
- District heating and cooling/heat source system
Consistently produced with high quality! Even during an earthquake, we deliver clean water while keeping it clean.
- Water and sewerage pipe fittings
Technology that supports lifelines is the foundation. We will continue to grow alongside advancing cities.
- Water supply facilities
- Fire extinguishing equipment
- Other Management Services
We will cut the VP pipes (water pipes) manufactured by Maezawa Chemical Industries and finish them with lathe processing. Due to the characteristics of the material, we will strive to meet your reques...
- others
For odor and insect prevention! MP series specifically designed for PVC pipe installation.
- Piping and insulation
- Piping materials (plastic pipes)
We cut, drill, glue, and weld PVC sockets to manufacture construction piping materials. Due to the characteristics of the material, we strive to meet your requests as closely as possible regarding tol...
- others
A soft-seal partition valve that can be directly inserted into hard PVC pipes or steel pipes for connection.
- Safety and consumables
Solvent-free fittings for PVC pipes! No curing required with solvent application, equipped with vibration-absorbing flexible expansion and anti-detachment features!!
- Fittings
- Piping materials (copper pipes, cast iron pipes)
- Piping materials (plastic pipes)
Utilizing existing pipes as they are! Stainless Steel Dynamic Flexible Pipe Insertion Method
- Water and sewerage pipe fittings
- Airport facilities
- Water Supply Facilities
We will assemble pre-piping by bonding PVC pipes, PVC fittings, valves, etc. From material procurement to cutting, bonding, inspection, packaging, and shipping.
- Drainage and ventilation equipment
Introducing a water vest product for gas pipe end installation, as specified by the Ministry of Land, Infrastructure, Transport and Tourism!
- Piping and insulation
- Piping materials (plastic pipes)
Upgraded for high pressure! Mechanical pipe fittings featuring high-strength grip rings.
- Fittings
Standard for Wave Tubes: Independent Mountain Single Press Tube
- Bridge Construction
- Dam construction
- Airport facilities
A wide variety of connection types! A large selection of flexible pipes for plumbing that can be chosen based on installation location and purpose.
- Water and sewerage pipe fittings
- Tile work
Can be used when the drainage pipe is already installed within the concrete! Introducing the retrofitted type weep hole.
- Piping materials (plastic pipes)
- Flood prevention facilities, fire tanks, and flood control ponds
MB series dedicated to gas pipe installation! Connection piping is available for sizes 50A to 150A.
- Piping and insulation
- Piping materials (plastic pipes)
The low-cost realization of small slot and high opening rate strainers has been achieved.
- Sanitary fixtures
The coating film is seamless, forming a PVC film on the "inner and outer surfaces" of the steel pipe without any "joints" or pinholes.
- Piping Equipment