CEA 4001 - Test Valves

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e) any pipe which cannot be drained through another drain valve, with the exception of
drop pipes to single sprinklers in a wet installation.
The valves shall be fitted at the lower end of the pipework and sized as specified in Table 27. The
outlet shall be not more than 3m above the floor and shall be fitted with a brass plug.
Table 27: Minimum size of drain valves
Valve principally draining
Minimum diameter d of
valve and pipe
mm
LH installation
40
OH or HHP or HHS installation
50
Subsidiary installation
50
A zone
50
Trapped distribution pipes
dia ≤50
50 <dia≤80
dia >80
20
32
50
Trapped range pipes
dia ≤50
dia >50
20
25
Trapped pipework between dry or subsidiary alarm valve and a
subsidiary
stop valve installed for testing Purposes
15
13.5 Test valves
13.5.1 Alarm and pump start test valves
15mm test valves shall be provided, as appropriate, to test:
a) the hydraulic alarm and any electric alarm pressure switch by drawing water from
the immediate downstream side of:
- a wet alarm valve, and any downstream main stop valves;
- an alternate alarm valve;
- a pre-action alarm valve;
b) the hydraulic alarm and any electric alarm pressure switch by drawing water downstream of
the main water supply stop valve and from the upstream side of:
- an alternate alarm valve;
- a dry pipe alarm valve;
- a pre-action alarm valve;