[Case Study] Private Residence Basement

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last updated：Jan 05, 2026

Introducing a case of installing a low-cost toilet in a personal home basement!

We would like to introduce a case where "Sewage 160NA (OZ160-100NA)" was installed in the basement of a private residence. In this case, we received a request to install a toilet in the basement at a low cost. Since it is for residential use, we selected a product with quiet operation. Additionally, because the wastewater would be pumped to the existing drainage pipes on the upper floor, a sewage tank was not necessary. A toilet with a drainage center of 155mm was chosen to be installed behind the toilet. 【Case Overview (Partial)】 ■ Installation Location: Private Residence, Basement ■ Model: Sewage 160NA (OZ160-100NA) ■ Connected Fixtures: Toilet (flush volume 6L, wall drainage, drainage center 155mm) and washbasin *For more details, please download the PDF or feel free to contact us.

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【Summary of Other Cases】 ■Challenges <Requests> - We want to install a toilet in the basement of a private residence at a low cost. ■Proposal Details <Key Points in Design and Construction> - Since it is for residential use, we selected a sewage pump with a quieter operating noise than the 120NA, specifically the 160NA. - A sewage tank is unnecessary as the drainage will be pumped to the existing drainage pipe on the upper floor. - We requested a toilet with a drainage center of 155mm to be installed at the back of the toilet. - A maintenance access size of 900mm square (minimum required dimension of 600mm square or more) was provided. *For more details, please download the PDF or feel free to contact us.