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-55%Honeywell Straight Bypass Valv...A simple means of ensuring adequate flow through boilers which require a bypas... A simple means of ensuring adequate flow through boilers which require a bypass. moreDetails
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Honeywell Home Honeywell Diff ...This automatic bypass and differential pressure valve from Honeywell Home is b... This automatic bypass and differential pressure valve from Honeywell Home is brilliant for maintaining constant differential pressure in your heating system. It minimises flow noise when thermostatic radiator valves are closing. The boiler return... moreDetails
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Honeywell Home Honeywell 22mm ...This straight bypass valve lets you control water flow in the heating circuit ... This straight bypass valve lets you control water flow in the heating circuit depending on the water pressure across it. It is also ideal for maintaining a minimum flow rate through the boiler, as well as reducing circulation pressure when there are... moreDetails
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Honeywell Home Honeywell Tampe...For domestic wet central heating systems, this Honeywell Tamper Proof Room The... For domestic wet central heating systems, this Honeywell Tamper Proof Room Thermostat is a mains voltage room thermostat that provides automatic temperature control. It is often utilised for directly switching a circulating pump or boiler, or operating... moreDetails
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Honeywell Straight Auto By-Pas...Honeywell DU144A1001 Straight Auto By-Pass Valve 22mm controls the flow of wat... Honeywell DU144A1001 Straight Auto By-Pass Valve 22mm controls the flow of water through a bypass circuit which is installed between flow and return pipework, typically at or near the boiler. Building Regulations advice states that if a bypass is... moreDetails
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Honeywell Home Du145 Auto By-P...The Honeywell Home DU145 automatic bypass valve controls the flow of water thr... The Honeywell Home DU145 automatic bypass valve controls the flow of water through a bypass circuit which is fitted between flow and return pipework, typically at or near the boiler. Building Regulation advice states that if a bypass is installed, an... moreDetails
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Honeywell Differential By-Pass...Honeywell DU145-3/4B Differential By-Pass Valve 22mm controls the flow of wate... Honeywell DU145-3/4B Differential By-Pass Valve 22mm controls the flow of water through a bypass circuit which is installed between flow and return pipework, typically at or near the boiler. Building Regulation advice states that if a bypass is... moreDetails
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Honeywell Home V4043/V4044/V40...* Motor open * Spring return action * Manual lever for filling and draining th... * Motor open * Spring return action * Manual lever for filling and draining the system * Powerhead replaceable without draining down * Potential free end switch for electrical control of pump and/or boiler * Quiet operation, minimal power consumption... moreDetails
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22mm 2 Port Zone Valve V4043H1...Is a selection of two port valves and has a wide range of applications in dome... Is a selection of two port valves and has a wide range of applications in domestic central heating systems. The V4043H normally closed models have end switches for electrical control of boiler and pump. The normally open model is particularly... moreDetails
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Honeywell Home 2 Port Motorize...The V4043 series of two port Motorised Valves has a wide range of flow control... The V4043 series of two port Motorised Valves has a wide range of flow control applications in domestic and light commercial central heating systems. The V4043H normally closed models have end switches for electrical control of pump and/or boiler. The... moreDetails
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