Water service pipe management and installation

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Acceptance of applications for installation work and design reviews

We accept applications for installation work from applicants (made through the agency of plumbing contractors designated by the Tokyo Metropolitan Government) and check the appropriateness of design reviews.

On-site inspection of service pipe installation or removal work

We check the appropriateness of on-site inspections of the installation or removal of service pipes that branch off from the distribution main.

Acceptance of completion notifications and completion inspections

We accept completion notifications for water service installation work and check the appropriateness of completion inspections.

Replacement of expired meters

We provide administration and supervision for the replacement of meters that have exceeded their certified service life (8 years) in accordance with the Measurement Act.

Electronic application help desk operations for water service pipe installation work

We respond to users who contact us to ask for advice or make inquiries in relation to electronic applications for water service pipe installation work or electronic inspections of water pipeline management charts. We also provide instructions on how to submit electronic applications.

Point of contact: Electronic Application Help Desk for Water Service Pipe Installation Phone: 03-5305-5946 (hours: 08:30–17:15, except for Saturdays, Sundays, and public holidays)

On July 1, 2024, we expanded the function of the electronic application for water service pipe installation. See here for details

Make an appointment to visit the office (browse or receive certified copies of water service related documents)

We take advance appointments for issuing and browsing of completed water supply system drawings via the water supply system drawing browsing and issuing appointment form. Reception: Service pipe construction offices (23 wards), service stations (Tama area) Make an appointment here

Instructions for making electronic applications at reception

Service pipe construction office and service station reception staff provide instructions for making electronic applications. See here for details

Period: From July 1, 2023
Locations: Service pipe construction offices (23 wards), service stations (*six stations)

If you wish to receive instructions for making electronic applications from reception staff, please contact the service pipe construction office or service station you wish to visit.
*Login ID and password required for electronic application. Obtain an ID and password before visiting.

Inspection of water supply facilities equipped with water tanks

Inspection of water supply facilities equipped with water tanks (entrusted by the Tokyo Metropolitan Government Bureau of Waterworks)

Inspection overview: The Bureau of Waterworks Tokyo Metropolitan Government has been conducting surveys on the management of water supply facilities equipped with water tanks to promote more appropriate management of such facilities. We have been entrusted to undertake inspections of water supply facilities equipped with water tanks since 2004. This service is related to the provision of advice and information to installers (owners) and administrators commissioned by installers (hereinafter referred to as “installers, etc.”) concerning appropriate management and switching to the direct water supply system. Link: Appropriate management of water supply facilities equipped with water tanks (Website of the Bureau of Waterworks Tokyo Metropolitan Government)

What are water supply facilities equipped with water tanks? The term “water supply facilities equipped with water tanks” refers collectively to water supply facilities that are situated further downstream than the water tanks installed in commercial buildings, apartment buildings, and other buildings. One advantage of the water supply system that makes use of water tanks is that users can use the water left in their water tanks in the event of a disaster or an interruption to supply. At the same time, however, hygiene issues (turbidity, odor, etc.) may be present if regular inspections and cleaning are not carried out properly. Appropriate management must be carried out on a daily basis. Although the Bureau of Waterworks Tokyo Metropolitan Government is responsible for the quality of water until it reaches the water tanks, the installers, etc. are responsible for managing the quality of the water once it reaches these tanks.

On-site inspection details

（1）Inspection costs *We will visit the site after receiving consent from the installer and coordinating the schedule.

（2）Duration of inspection: About 30 minutes

（3） Target of inspection: Water supply facilities equipped with water tanks in the Tokyo metropolitan water supply area *Not a legal inspection and therefore not mandatory.

（4）Inspection details: (i) Inspection of facilities: Check the appearance and interior of the water tank facilities. (ii) Simplified water-quality inspection: Inspect the water at the direct connection plug and in the water tank to compare their residual chlorine, turbidity, and color levels. (iii) Capacity inspection: Check how much water is replaced each day.

Other inspection-related matters: The Bureau of Waterworks Tokyo Metropolitan Government has been conducting postcard and telephone surveys on the management of water supply facilities equipped with water tanks to promote more appropriate management of such facilities.

To customers considering switching to the direct water supply system

To customers considering switching to the direct water supply system If you are considering switching from water supply facilities equipped with water tanks to the direct water supply system, please see the following page for information. Link:To customers considering switching from water supply facilities equipped with water tanks to the direct water supply system (Tokyo Metropolitan Government Bureau of Waterworks website)

Inquiries about water tank inspections

Water Service Installation Section, Contact Point Service Division, Customer Service Department Phone:03-5805-3822 Hours: 9:00 a.m. to 5:00 p.m. (weekdays)

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