Drainage Consultants Call: 0207 536 2778

Sewer Adoption

Call 0207 536 2778

Sewer Adoption involves the transfer of responsibility to a Water Authority undertaker of a developer constructed sewer. The Water Industry Act, Section 104 allows developers to enter in to a sewer adoption agreement.

The WRc Plc publication Sewers for Adoption 6th edition sets out the procedure, design criteria, standard details and the specification that the works must be built to. It is normal policy that the provisions of Sewers for Adoption 6th Edition (SfA) should be applied uniformly throughout UK.

On new developments, any prospectively adoptable sewers should be put forward to us for inclusion in a Water Industry Act 1991, section 104 agreements. Our submissions ensure that the prospective public sewers are designed and constructed to acceptable standards.

The Section 104 sewer adoption process is as follows:

  • We submit to Water Authority the drawings to SFA6, before work begins on site.
  • Water Authority give technical approval to acceptable prospectively adoptable sewers.
  • We oversee a formal agreement with Water Authority and then begin building the sewer(s).
  • Having a section 104 agreement with Water Authority assist developers with marketing the properties.
  • We ensure that an agreement is in place within 13-15 Weeks of the first submission of drawings.
  • Arrange all standard fees as set out in SFA6 and a discuss the bond, usually 10%, that may be required.
  • Our Team monitor the works on site and signs off air testing, etc.
  • We supply drawings showing the sewers as-built.
  • When the sewers are built and a majority of premises are occupied, we will request a joint inspection.
  • If the sewers are found to be satisfactory, then the maintenance period- usually 3 to 12 months- begins.
  • A joint final inspection is arranged just before the end of the maintenance period.
  • After any remedial works are completed, Water Authority will arrange vesting (adoption) of the sewers.
  • Once vested, the sewers are public sewers and the Water Authority are responsible for their maintenance and repair.

    Sewer Adoption

    Call 0207 536 2778

Costs & Fees