Yokohama City Drainage Equipment Handbook

The sewage system plays a major role in improving the living environment, controlling flooding, and conservation water quality in public water bodies.

Even if sewerage facilities are maintained, they cannot fulfill their role as sewerage unless drainage facilities that allow sewage to flow into public sewers are complete.

Drainage equipment is an important facility that can achieve the purpose of the sewer only if it is quickly and accurately maintained together with the public sewer.
Therefore, it is important that drainage facilities be properly designed and constructed according to the technical standards stipulated by laws and regulations, and that proper maintenance is performed.

When we are going to establish new drainage facilities, we submit "drainage facilities (wash toilet remodeling) plan confirmation application" beforehand, and the plan is installation of drainage facilities including the Sewerage Law and the Yokohama City Sewerage Ordinance You must receive confirmation from the mayor that it conforms to laws and regulations about structure and structure.

When applying for drainage equipment plan confirmation, please read the "Yokohama City Drainage Equipment Handbook (2017 Revised Edition)" carefully and make an appropriate design.

In addition, please refer to Resources and Waste Recycling Bureau business waste measures section (Phone: 045-671-2547) about thing about septic tank.

We publish "Yokohama-shi drainage equipment handbook" on homepage at any time from "2017 revised edition".
(We do not create or sell handbooks in booklet format.)

When the Internet is not available, you can read and copy the one printed at the Yokohama City Citizen Information Center (City Hall 3F) and use it.

Collective download (PDF: 3,466KB) Revised version for 2017
Cover, Table of Contents, Chapters 1 to 5, Related Laws and Regulations

• Cover, Table of Contents (PDF: 147KB)
• Chapter 1 Outline of laws and regulations related to drainage construction
• (Part 1) （PDF：358KB）
• (Part 2) （PDF：272KB）
• Chapter 2 Administrative Office of Drainage Equipment (PDF: 463KB)
• Chapter 3 Technical Standards for Drainage Equipment
• (Part 1) （PDF：466KB）
• (Part 2) （PDF：631KB）
• (Part 3) （PDF：917KB）
• (Part 4) （PDF：572KB）
• (Part 5) （PDF：257KB）
• (Part 6) （PDF：205KB）
• Chapter 4 Underground Drainage Tank (PDF: 944KB)
• Chapter 5 Handling related laws and regulations on subsidies and lending of flush toilet equipment funds (PDF: 981KB)
• Revised version of past handbooks
• Collective download (PDF: 3,045KB)Revised version of FY2006 (Revised in April 2015)

About application for confirmation of drainage plan

• Public Works Office, each district

About "Yokohama-shi drainage equipment handbook (2017 revised version)"

• Sewerage River Bureau Sewerage Pipeline Department Sewer Management Division (Phone) 045-671-2829