Office Building Tea Room | Case Study on the Adoption of Pressurized Drainage Pump Units

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last updated：Jan 29, 2026

Introducing a case that completely overcomes layout restrictions with no underfloor piping space and no drilling allowed!

We would like to introduce a case where the "Zarai NPBW (ZA-100NPBW)" was installed in the tea room of an office building. In this case, there was a challenge of wanting to set up a tea room for a tenant on the first floor, but due to the OA floor, there was no space for underfloor piping, and it was also not possible to drill holes in the floor, which limited the layout. During the installation of the equipment, each inflow pipe was individually piped, using the connection points of four pump units. The piping route utilized the ceiling, with a discharge pipe rising 3 meters and running horizontally in the ceiling to connect to the existing drainage pipe. 【Case Overview (Partial)】 ■ Installation Location: Office Building Tea Room ■ Model: Zarai NPBW (ZA-100NPBW) ■ Connected Equipment: 2 sinks, coffee machine, water heater, ice maker *For more details, please download the PDF or feel free to contact us.

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【Summary of Other Cases】 ■Issues <Requests> - Unable to create space for underfloor piping - Unable to make holes in the floor, which limited the layout ■Proposed Content <Key Points in Design and Construction> - Adopted a mixed drainage NPBW due to the large number of connection fittings - Each inflow pipe is individually piped, using the connection points of four pump units - The piping route utilizes the ceiling, with a discharge pipe raised 3m and run horizontally in the ceiling to connect to the existing drainage pipe - The water heater is wall-mounted, and the hopper section for indirect drainage has been secured at the pump top plus 150mm *For more details, please download the PDF or feel free to contact us.