Arrestors should be installed within six feet of the problem valve/tap May be installed at any angle Mini Resters with a male 1/2" thread are simply fitted with Female 1/2" x 15mm Iron Tee Mini Resters with a Hose Tee Connection install directly on Washing Machine Supply Valves or directly to Washing Machines Designed for residential use For Single Application Installation Manufacturer Stock Code:PPFWAT367065 Diameter:15 mm Sub-Category:Heating Control Accessories Brand:Thomas Dudley Category:Spares and Accessories