Clapper
The Loss Prevention Certification Board (LPCB part of BRE Global) sets the standards needed to ensure that fire and security products and services perform effectively. LPCB’s Loss Prevention Standards (LPS) are applied in fire and security sectors around the world.
LPS 1040 - 2.3, Requirements and testing procedures for the LPCB approval and listing of wet alarm valve sets, published by BRE Global in 2014, defines a clapper or clapper assembly as: ‘The main movable sealing element of the valve which prevents reverse flow of water.’
[edit] Related articles on Designing Buildings Wiki
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