WIAPS
Plumbing and water · Water industry approved plumber scheme
WIAPS is the Water Industry Approved Plumbers’ Scheme. It approves plumbers against specified qualification, knowledge and business requirements; it is one route associated with the wider WaterSafe register.
Checked Official sources below.
What it covers and whether it is required
WIAPS approval relates to water fittings compliance, not a statutory licence for every plumbing activity. Some work still needs advance notification to the water supplier; check the exemption and certification rules for the particular job.
Joining requirements and costs
WIAPS requires a recognised plumbing-related qualification, water regulations knowledge and public liability insurance. Its published approved-plumber criteria specify at least £2 million public liability cover. Applicants submit qualification and business evidence for review.
Check the current fees with WIAPS before applying. Ask whether the quotation includes application, assessment, renewal and any per-job charges. Use published fees or ask for a written quotation.
What it means for homeowners
Check current approved status and retain the plumber’s compliance documentation. WIAPS says approved plumbers must put right work that contravenes the applicable water fittings requirements. This is not the same as a blanket guarantee for unrelated work.
How to check a claim
Official member, card or certificate check: WIAPS.
Match the record to the named person or contracting business. Check the current scope, not just a logo on a van or an old certificate. If the public record does not show the detail you need, ask the body to confirm it before appointing the business.
Where the scheme applies
WIAPS says its approved installer groups are recognised by all UK water suppliers. Check notification and certification requirements for the actual work in England, Wales, Scotland or Northern Ireland.
Common questions
Is WIAPS the same organisation as WaterSafe?
No. WIAPS is an approved contractor scheme, while WaterSafe brings participating schemes together in a wider register.
How do I check WIAPS status?
Use the official verification service linked in this guide. Match the person or legal business name, current status and relevant work category. For a guarantee, check the document issued for your contract as well.
Official sources
Sources checked November 2026. Scheme rules can change; confirm current requirements before applying or signing a contract.