[Case Study] Office Building Tea Room

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last updated：Jan 05, 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, it was not possible to take up space for underfloor piping, and drilling holes in the floor was also not an option, which limited the layout. During the installation of the equipment, each inflow pipe was individually piped, using the connection points of the pump unit in four locations. The piping route utilized the ceiling, with the discharge pipe raised 3 meters and run 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 allocate 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 numerous connection fixtures - Each inflow pipe is individually piped, using the connection points of four pump units - The piping route utilizes the ceiling, with a discharge pipe rising 3m and running 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 +150mm *For more details, please download the PDF or feel free to contact us.