{"product_id":"lavatherm-2-port-zone-valve-actuator-head-only-for-honeywell-v4043h1056","title":"LavaTherm 2 Port Zone Valve Actuator Head Only for Honeywell V4043H1056","description":"\u003cbody\u003e\n\n\n\n\n\u003cul\u003e\n\u003cli\u003eReplaces Honeywell V4043H: Direct replacement powerhead for a V4043H or V4043H1056 zone valve, and for the LavaTherm 2 port valve\u003c\/li\u003e\n\u003cli\u003eNo draining needed: The head fixes to the valve body with two screws, so a failed head is a same day fix rather than a full system drain down\u003c\/li\u003e\n\u003cli\u003eHead only, valve not included: Supplied with two fixing screws, for when the motor or switch has failed but the valve body is still sound\u003c\/li\u003e\n\u003cli\u003eStandard wiring: Runs from a 230 V AC supply and wires terminal for terminal into the existing wiring centre, with the auxiliary switch that fires the boiler and pump\u003c\/li\u003e\n\u003cli\u003eManual lever: Holds the valve open by hand for filling, venting or commissioning, then releases back to automatic operation\u003c\/li\u003e\n\u003cli\u003eFits 22 mm and 28 mm: One actuator covers both of the two port body sizes found in most UK domestic central heating systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThe LavaTherm 2 Port Motorised Valve Actuator Head is the electrical half of a two port zone valve, supplied on its own as a replacement part. In a typical failure the motor or the auxiliary switch gives up while the brass valve body in the pipework is still perfectly serviceable, so fitting a new head avoids draining the system and re-making the pipework.\u003c\/p\u003e\n\u003cp\u003ePlease note: this listing is for the actuator head only. The valve body is not included.\u003c\/p\u003e\n\u003cp\u003eThe head is secured to the valve body by two screws, and a pair of fixing screws is supplied in the box. With the electrical supply isolated, unscrew the old head and lift it away, seat the new head on the same spindle, screw it down and transfer the wiring across terminal for terminal. No water is lost and no joints are disturbed.\u003c\/p\u003e\n\u003cp\u003eThe head runs from a 230 V AC supply. When energised, the motor drives the valve open against its return spring; once fully open, an auxiliary switch makes and passes a switched live on to fire the boiler and run the pump. When the call for heat ends, the spring returns the valve to closed. A manual lever holds the valve open for filling, venting or commissioning.\u003c\/p\u003e\n\u003cp\u003eThis head is the direct replacement for the actuator on a Honeywell V4043H or V4043H1056 two port zone valve, and for the LavaTherm 2 port valve. It fits both 22 mm and 28 mm valve bodies, with the same spindle and screw fixing pattern and the same wiring as the original.\u003c\/p\u003e\n\u003cp\u003eA failed actuator head is one of the most common causes of a heating or hot water outage. Because this powerhead swaps over without draining the system and wires terminal for terminal into the existing wiring centre, it is the kind of repair that gets the heating back the same day the part arrives and can save an engineer call out.\u003c\/p\u003e\n\u003cp\u003eInstallation must comply with current wiring regulations.\u003c\/p\u003e\n\n\u003c\/body\u003e","brand":"LavaTherm","offers":[{"title":"Default Title","offer_id":58683975532928,"sku":"2200087","price":21.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/0629\/4936\/files\/353994c2-8d60-49d7-b258-de032ff9e9bc.jpg?v=1786529017","url":"https:\/\/www.lavastore.co.uk\/products\/lavatherm-2-port-zone-valve-actuator-head-only-for-honeywell-v4043h1056","provider":"Lavastore","version":"1.0","type":"link"}