**Mains Pressure Reducer 3/4 inch [19mm]** Tap Pressure Reducers are threaded 3/4 Inch (19mm) adapters that fit straight onto a garden tap and reduce the tap pressure. They are ideal for autopot smart valves and top up float valves, so your don't have to fiddle with valves to get the right flow. Pressure Reducer Specifications Use for an inlet pressure of up to 15 PSI (8.0 to 10.0 bar mains water pressure is normal) Outlet flow pressure is 3 PSI (2.0 bar or 20Kpa). Water flow reduces from 30 litres per minute to around 0.4 lpm