Stop valve
The Illustrated Guide to Hot and Cold Water Services (BG 33/2014), written by Reginald Brown and published by BSRIA in 2014, it suggests that a stop valve or shut off valve as: ‘Located at the boundary of the property to isolate the water supply to the building and allow maintenance of the water meter. An additional stop valve is located inside the building where the mains water pipe enters the building to shut off the water supply in an emergency or for maintenance.’
--BSRIA
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