Hercules Pressure Reducing / Regulating Water Valve 22mm or 15mm connections Connection size 22mm and 15mm* (*using reducing inserts included) Pressure gauge reading: 0-10 Bar/ 160psi Suitable for water temperatures of up to 65C Inlet Pressure up to 16Bar / Outlet pressure fully adjustable between 1bar & 6 Bar Pressure gauge connection: 1/4" BSP/ Factory Pre-set at 3Bar