日本プラグ工業 List of Products and Services

We would like to introduce a construction example of the "Pump Chamber Type Manhole" using the "Super Plug System Method" handled by Nippon Plug Industry. With the new installation of the sewer system, the need for pump pressurization was eliminated, leading to the removal of the existing pump, backfilling the lower part, and constructing the invert. The construction results included the installation of super plugs on each pipe for water-stopping work, followed by the construction of the invert. 【Construction Example】 ■ Issues - Removal of the existing pump, backfilling the lower part, and constructing the invert. ■ Results - Installation of super plugs on each pipe for water-stopping work. - Exposing the bottom of the pump chamber type manhole and completing the invert. *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of "water stopping at the advancing reach section using the 'Super Plug System Method'" handled by Nippon Plug Industry. This project involved connecting a new pipe to an existing pump chamber manhole using the thrust method. The baffle plug was assembled inside the manhole and installed at the advancing reach section to stop the water. 【Construction Example】 ■Issue - Connecting a new pipe to an existing pump chamber manhole using the thrust method. ■Result - Assembled the baffle plug inside the manhole and installed it at the advancing reach section to stop the water. *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of "water stop at a depth of 25m in the stirring tank of a large purification center" using the "Super Plug System Method" handled by Nippon Plug Industry. Due to a malfunction of the solenoid valve in the pump machinery room, we removed the existing solenoid valve and installed a new one. To stop the water at the tip of the trumpet pipe located at a depth of 25m in the stirring tank, we designed the water stop main body, pressurizing machine, and monitoring tube based on construction design drawings and on-site survey data. 【Construction Example】 ■ Issues - Remove the existing solenoid valve and install a new solenoid valve - Stop the water at the tip of the trumpet pipe located at a depth of 25m in the stirring tank ■ Results - Designed the water stop main body, pressurizing machine, and monitoring tube based on building design drawings and on-site survey data - Successfully stopped the water and installed the new solenoid valve *For more details, please refer to the PDF materials or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of the "New Pipe Connection and Disassembly Transport Method" using our "Super Plug System Construction Method." This project involved connecting a new pipe to an existing manhole, where the existing pipe had a large diameter of Φ2100mm and the equipment intake was Φ900mm. We implemented a disassembly design to assemble the Super Plug and backflow prevention plug inside the manhole and connected the new pipe to the existing manhole. 【Construction Example】 ■ Challenges - Connecting a new pipe to an existing manhole - The existing pipe has a large diameter of Φ2100mm, and the equipment intake is Φ900mm ■ Results - Implemented a disassembly design to assemble the Super Plug and backflow prevention plug inside the manhole - Successfully connected the new pipe to the existing manhole *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of the "disassemblable super plug" (for on-site assembly) using the "super plug system construction method" that our company handles. This project involved connecting a new pipe to an existing manhole on the 5th basement level using a thrust method and constructing an invert. The construction result showed that the existing inflow pipe had a diameter of 2000mm, while the material entrance had a diameter of 900mm. Therefore, we used two disassemblable super plugs and a guide pipe to dewater the construction area. After that, we connected the new pipe with a diameter of 1500mm and completed the invert construction. 【Construction Example】 ■ Challenge - Connect a new pipe to the existing manhole on the 5th basement level using a thrust method and construct an invert. ■ Result - Used two disassemblable super plugs and a guide pipe to dewater the construction area. - Completed the connection of the new pipe with a diameter of 1500mm and the invert construction. *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce an example of construction using the "Super Plug System Method" handled by Nippon Plug Industry, specifically the 'BOX Plug'. This project involved replacing an aging open channel drainage system with a new drainage system. As a result of the construction, a BOX Super Plug was installed at the road-crossing box culvert section, and the flow of water was diverted through a bypass pipe to replace it with the new drainage system. 【Construction Example】 ■ Challenge - Replace the aging open channel drainage system with a new drainage system. ■ Result - Installed a BOX Super Plug at the road-crossing box culvert section. - Diverted the flow of water through a bypass pipe and replaced it with the new drainage system. *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of "insertion manholes (2 locations) flow path change" using our "Super Plug System Method." This project involved the relocation of a sewage pipe due to subway construction, where new insertion manholes were installed at existing pipes at various locations. A pipe jacking method was used to insert the new pipes, and the flow path was changed from the existing pipes to the new pipes. The construction results showed that the Super Plug System Method was adopted from the design stage, using super plugs to stop the water, installing the new insertion manholes, and changing the flow path. 【Construction Example】 ■ Challenges - Installation of new insertion manholes at existing pipes at various locations - Changing the flow path from existing pipes to new pipes ■ Results - Adoption of the Super Plug System Method from the design stage - Stopping the water using super plugs, installing new insertion manholes, and changing the flow path *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of connecting a new pipe to an existing manhole using the "Super Plug System Method" in the case of "multiple inflow pipes with elevation differences to an existing manhole." This project involved connecting a new pipe to an existing box-type manhole with a large flow rate, which has an upstream diameter of 1800mm, a downstream diameter of 2100mm, and inflow pipes with diameters of 1200mm and 600mm, and inverting it. The construction result achieved a watertight condition inside the box-type existing manhole using the Super Plug System Method, and the connection and inversion of the new pipe were successfully completed. 【Construction Example】 ■ Issues - Connect a new pipe to an existing box-type manhole with a large flow rate and invert it. - Multiple inflow pipes with elevation differences. ■ Results - Watertight condition inside the box-type existing manhole achieved using the Super Plug System Method. - Connection of the new pipe and construction of the inversion completed. *For more details, please refer to the PDF document or feel free to contact us.

• Civil Engineering Method
• Water Supply Facilities
• Sewerage facilities

We would like to introduce a construction example of "changing the flow path when the intersection angle between existing and new pipes is small" using the "Super Plug System Method" that our company handles. A new manhole was installed on the existing pipe with a diameter of 1200mm, and it was connected to a new pipe with a diameter of 1200mm, changing the flow path from the existing pipe to the new pipe. As a result of the construction, we performed water-stopping work using the Super Plug System Method, laid the new pipe, and set up a manhole with an invert, thereby changing the flow path. 【Construction Example】 ■ Issues - A new manhole was installed on the existing pipe with a diameter of 1200mm, and it was connected to a new pipe with a diameter of 1200mm. - The flow path was changed from the existing pipe to the new pipe. ■ Results - Water-stopping work was performed using the Super Plug System Method. - The new pipe was laid, and a manhole with an invert was set up, changing the flow path. *For more details, please refer to the PDF document or feel free to contact us.

• Water Supply Facilities
• Sewerage facilities
• Civil Engineering Method

We would like to introduce a construction example of "BOX culvert new pipe connection and flow path change" using the "Super Plug System Method" handled by Nippon Plug Industry. This project involved constructing and connecting a new BOX culvert to an existing BOX culvert and changing the flow path. The construction utilized the Super Plug System Method, diverting the flow upstream of the existing BOX culvert to a temporary waterway, drying out the area necessary for the connection, and then constructing and connecting the new BOX culvert. 【Construction Example】 ■ Issues - Construct and connect a new BOX culvert to the existing BOX culvert and change the flow path. ■ Results - Divert the flow upstream of the existing BOX culvert to a temporary waterway. - Dry out the area necessary for the connection. - Construct and connect the new BOX culvert, changing the flow path. *For more details, please refer to the PDF document or feel free to contact us.

• Sewerage facilities
• Water Supply Facilities
• Special Construction Method

The "Super Plug System Construction Method" is a patented method developed for the purpose of sewer construction, including the installation of insertion manholes, changes to pipeline flow paths, and the renewal and restoration of pipelines. This method utilizes a super plug that corresponds to the type of sewer construction and systematizes the construction process. There are also versions available for water supply construction. Additionally, the super plug can be designed to fit the site, allowing for use in various cross-sections such as circular, oval, rectangular, elliptical, and square shapes. 【Features】 ■ Provides a work environment without water at the construction site for sewer work ■ Allows temporary water stoppage during the switching of the water conveyance pipe with a super plug installed upstream ■ Compatible with large-diameter sewer pipes and large box culverts *For more details, please download the PDF or feel free to contact us.

• Civil Engineering Method
• Water Supply Facilities
• Sewerage facilities