15mm isolating valve is used to turn off the supply of water from any fitting so that essential repairs can be carried out. Screwdriver operated, brass, chrome plated isolating valve. Used in hot or cold water systems to isolate part of the system: avoids the need to drain down the whole system to carry out work. Compression fitting at each end. Available in singles and packs of 2,5,10 and 25 for bulk savings. WRAS Approved Sizes 8mm to 28. Max. Operating Pressure 8mm - 54mm = 25.0 Bar Max. Operating Temperature = 99°C.