Omnipure VH1/4-JG 1/4" Quick Connect Valve HeadUse the Omnipure 1/4" John Guests Quick Connect Valve Head with any of the Omnipure Q-Series Water Filters. To install the Omnipure Q-Series head, simply insert your water supply tubing into the Omnipure Valve Head Quick Connect fittings.Mount the Q-Series 1/4" Quick Connect Valve Head with the Omnipure Q-Bracket.The valve head allows you to automatically turn off the water supply by twisting off the Omnipure Q-Series water filters. This makes changing the water filters quick and easy.