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Final question I hope.... can you get a 2 port zone valve that's just 3 wire or is using standard 5 wire OK this has worked fine in the present set up I need a honeywell or equivalent see link http://www.toolstation.com/shop/Heating/Motorised+Valves/2+Port+Motorised+Valve+22mm/d230/sd3232/p85125...

No need for pics you've spot on basically the system works as so... if the controller is on hot water only, then the pump and the boiler are controlled via cylinder stat and if the controller is set to heating and hot water then its controlled via room stat obviously the cylinder needs to heat...

First post so hoping someone can help I need to change the diverting valve on my system but have become some what confused as to what plan my system is I assumed it was C Plan but investigating I found that only the the live and neutral were connected as in a W Plan but if it was a W Plan it...