Approved Contractor: FAQs

What are approved contractor schemes?

For the purposes of the water fittings regulations/byelaws approved contractor schemes are voluntary organisations for plumbers and plumbing contractors set up in accordance with regulation 1(2) of the water fittings regulations/byelaws. Approved contractors are either approved by a water undertaker or an organisation appointed by a regulator.

There is no mandatory requirement for plumbers to join a scheme.

There are currently six approved contractor schemes, some operate nationally and others in defined areas.

Some schemes restrict membership to qualified plumbers who can certify all types of plumbing work in any premises, whilst others offer sector schemes open to plumbing contractors who can certify a limited scope of plumbing work


Water Industry Approved 

Approved by Regulator 

A Plus (Anglian Water) 

Association of Plumbing and Heating Contractors (APHC)

Water Industry Approved Plumbers’ Scheme (WIAPS) operated on behalf of 15 water undertakers 

Chartered Institute of Plumbing and Heating Engineering (CIPHE) 

Watermark (Severn Trent)

Scottish and Northern Ireland Plumbing Employers’ Federation (SNIPEF) 



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Uncontrolled if downloaded. This is informative, non-statutory guidance and intended for general guidance purposes only; it is subject to change.

Compliance with this information should not be relied upon as guaranteeing no enforcement action will be taken by water undertakers. Water Regs UK accepts no liability for loss, indirect or consequential loss arising from or in connection with this guidance document.

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