JOHN GUEST PUSH FIT ASV3 - ISOLATION VALVE - 1/4" OUTLET
This is a John Guest ASV3 Isolation valve, it is a 15mm x 15mm continuous T fitting with a 1/4" lever operated outlet, it can be used to fit inline of a cold water supply pipe giving an outlet to accept a 1/4" pipe, be it copper or plastic, the on/off operation can be controlled by a small built in lever