OHN GUEST PART NO: CI3212U7S This John Guest fitting will allow you to fit 3/8"" pipe onto a standard 7/16" (11mm) drinking tap fitment. The push fit connector makes life extremely easy especially if working in confined spaces. It does will remove the need for the nut and collet. Suitable for drinking water purification systems, water conditioners, ice makers, drinks coolers and RO Units. This Fits all Taps Vyair Water Filter Taps and most others. It is suitable for use with both hot an cold liquids.