22mm Automatic Bypass Valve — Adjustable Differential Pressure Boiler Bypass TRV Heating Systems instant hot water tap dual thermostat

dual thermostat

IP67 ingress protection for durability and safe screed embedding

air control with floor limit

5mm length rare-earth magnet in a stainless steel housing removes magnetite sludge

travertine

22mm Automatic Bypass Valve — Adjustable Differential Pressure Boiler Bypass TRV Heating Systems instant hot water tap dual thermostatThe Tower ABBV1 is a 22mm angled automatic differential bypass valve for sealed central heating systems, designed to maintain a minimum flow rate through the boiler whenever thermostatic radiator valves (TRVs) or zone valves close down. Installed in a loop between the heating flow and return, the ABBV1 opens automatically when system differential pressure rises to the set point routing water through the bypass and preventing the pump from circulating