Hi guys, Here at Isovalve we design and manufacture plumbing fittings that can save you time, money and they look great! The Isovalve range is designed to be used within the pre-pipe stage of a house as the test plug (they can also be retro-fitted to older properties), once the builder has finished gibbing, tiling, painting etc. the protective sleeve is removed from the plug and the flange is placed over to look good! then you simply screw in the necessary nipple for what it's attaching to (we also do 10mm nipples for european tapware) and turn it on. SIMPLE!!! On top of that, the Isovalve has great adjustment for regulating the flow of water coming through, so if you have 20 litres of water cascading through a tap you can throttle it down to whatever is more appropriate. Saving you water and energy costs as well as avoiding having water splash all over you every time you turn the tap on. Sound interested???