Underground works

When the mainlaying process has been completed, properties are connected to it via a service pipe.

As a developer, you are responsible for laying the service pipe from the property to the boundary – this is called the supply pipe.

Supply pipe arrangement

Cambridge Water is responsible for laying the service pipe from the water main to the highway boundary, up to and including the boundary stopcock and the meter – this is called the communication pipe.

The estimated costs for laying the communication pipe will be included with our proposal. These costs are payable in advance.


All supply pipes must comply with the Water Supply (Water Fittings) Regulations 1999 and the Water Industry Act 1991. In summary these require that for each new connection:-

·         There is a separate supply pipe to each property or separately occupied part of the building(s) on the premises.

 ·         All supply pipes comply with the Water Supply (Water Fittings) Regulations 1999. These prevent the waste, misuse, undue consumption, contamination or erroneous measurement of drinking water.

 ·         All supply pipes have been so installed as to enable us to fit a water meter and chamber, generally at the boundary of the property to be served.

Copies of the regulations can be obtained here or by visiting our offices at 90 Fulbourn Road, Cambridge.

Once the supply pipes have been laid please notify Cambridge Water by completing the Work Order and Underground Regulations Inspection Request form.

At the same time you will need to send us payment for undertaking the work to lay the communication pipes

Within five working days of receiving the Work Order and Underground Regulations Inspection Request form and your payment, we will visit your site to check that the supply pipes comply with the regulations.

Where breaches of the regulations are found, Cambridge Water will require them to be remedied as soon as practicable before a connection can be made. It is a criminal offence to breach the regulations and offenders may face prosecution.

If, at any time, breaches to the regulations pose a risk to health, the water supply to the premises may be disconnected immediately to protect the health of occupants or others fed from the same public supply.

Communication pipes

Within 21 days of a successful inspection of your supply pipe, our contractor will carry out work to connect the supply pipes to the water main by installing the communication pipes.

Please note the new main will need to be in commission before new connections off it can be made.

Once the work has been completed an invoice itemising the actual cost of the work will be issued.

The cost of the work will be based on the length of service pipe laid and will be calculated using the charges current at the time the work was carried out. Please note our charges are reviewed on 1 April each year.

The relevant water and sewerage infrastructure charges will also be added to this final bill. Payment should be made within 14 days.