Secretary Of State Listing is required for products
and materials designed for the collection, treatment or distribution of drinking water, and is controlled by
the Drinking Water Inspectorate Committee on Products and Processes for Use in Public Water Supply
(DWI CPP).
Typically DWI CPP Regulation 31 approval will involve:
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1. WRAS/BS6920 - Tests of Effect on Water Quality.
2. Specific Analytes based upon product formulation and method of manufacture.
[Regulation 31 Protocol] |
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The approvals process is as follows:
- Application for Approval
to DWI
- DWI CPP assess
application
- DWI CPP inform Wqc of
test requirements (confidential)
- Wqc provide a quotation
for testing
- Wqc undertake testing
and produce test report
- DWI CPP review the test
report
- DWI CPP makes a
recommendation for approval of the product to the Secretary of State, if
appropriate
- DWI issues an approvals letter and the
product is incorporated into the list of "Approved Products and
Processes"
LINK -
[Approved Products List]
Unlike the Water Regulations Advisory Scheme
(WRAS) Tests of Effect on Water Quality, which are voluntary for products used in domestic building water systems,
all products used by water supply companies in
connection with public drinking water have to be assessed against the
appropriate requirements of Regulation 31.
Classes of Product/Application.
Regulation
31 applies to four basic product groups.
- Full Secretary of State Approval. This is applicable to products such as pipes, pipe linings and other applications where there will be a large surface area of the product exposed to
water.
- Products with only a small surface area contact with water, e.g. valves, meters, pumps etc. Normally the only testing required for these products is
WRAS/BS 6920.
- Traditional materials which have been used by the water industry for many years.
e.g. bitumen and cement mortar linings for water pipes. Acceptance of these materials is now being phased out.
- Materials approved before
1989 (now being phased out).
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