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Hello, wasn't sure the best place to put this but maybe someone on here could help or give some guidance. I am a 29 year old male and have recently completed my C&G level 2 diploma in plumbing and heating at college. I am very keen on learning further about plumbing and heating and am aware it...

Hi, I have a query regarding a honeywell 40003916-100 replacement zone valve head. It will be replacing a V4043H valve. The head has the 6th white wire which will not be needed as going on an S plan system. This is the first that I am changing and when carrying out a continuity test on the new...