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Certificate 042/97 Hepworth HEPvO hygienic self sealing plastic waste valve (August 2004 reissue)

Publication Year

2004

Document Status

Withdrawn

Abstract

A self-sealing valve designed to close the waste connection below a sanitary appliance to prevent the escape of foul sewer air back into the building. It eliminates negative pressure within a waste system by opening and allowing in fresh air until a state of equilibrium with the local atmospheric pressure is reached.

Document History

See also building certificates published by WIMLAS. 2nd issue.

Publisher Information

BRE Certification

Part of BRE Global Ltd, BRE Certification is now responsible for publication and issue of LPCB and WIMLAS documents and standards.

BRE Certification Limited
Bucknalls Lane
Garston
Watford
BREC
UK