John Guest Speedfit Blue Stop Tap 25 X 22mm UGSTV2522 (Pack of 2)JG Speedfit cold water service stop tap MDPE x copper or PEX instantly shuts of water. Simply push the valve fully onto the pipe. To demount, pull the collet towards the body of the push fit fitting and pull the pipe to release. Simply push the JG Speedfit cold water service stop tap MDPE x copper or PEX fully onto the pipe. The connection is demountable, making it easy to work with in the ground when maintaining or altering an existing set up.