Horobin 450mm/18 Inch 1 Inch Outlet Drain Stoppers - [HO-73622]
Features:
All new drains and sewers laid in the UK must be subjected to an air pressure test in accordance with BS 8005
Tests should be carried out before back filling or placing bedding or surrounding concrete, manhole to manhole, by inserting drain plugs at each end of the pipe
Air is pumped in by hand bellows until the pressure of 100mm is indicated on the gauge
Provided the air pressure does not fall below 75mm in a 5 minute period, the drain is deemed to have passed the test
These test plugs have brass wingnut and caps.
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