Optimum 22mm Valve Mid Position 3 Port Motorised Central Heating / Boiler System Control Vacuum Model_V15 HBN43N550B/03

HBN43N550B/03

DA29-10105J

HB676G8S1W/05

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Optimum 22mm Valve Mid Position 3 Port Motorised Central Heating / Boiler System Control Vacuum Model_V15 HBN43N550B/03Optimum 22mm Central Heating Boiler 3 Port Mid Position Valve Brand new, genuine original Optimum 3 port spring return mid position valve with 22mm compression fittings and 220 240V AC switched output. This is for use on fully pumped systems which when correctly wired with an appropriate room thermostat, cylinder thermostat and programmer will control the water flow from the boiler to either to hot water only, heating only, or to both simultaneously.