John Guest ASV3 - Angle Stop Valve 1/4" Water Feed Connector 15mm PUSH FIT This is a genuine John Guest ASV3 adapter and meets NSF (National Science Foundation) standards and is WRAS Approved fitting. This angle stop valve is used to obtain a 1/4" water feed from standard 15mm mains pipe. The valve connects inline with 15mm pipework using John Guest Speed Fittings, and tees off a 1/4" connection (to connect to water coolers, fridges, under sink filters, etc...). The valve has a built in one way check valve and a On / Off control for the 1/4" outlet for ease of use Acetal Angle Stop Valve 1/4" Water Feed Connector - John Guest ASV3 Push fits in-line with 15mm pipe to provide a 1/4" water feed Has a built in one way check valve and is a WRAS Approved fitting to NSF standard 15mm x 1/4" x 15mm Tee with flow control valve for 1/4" output Genuine John Guest part