Tony
Could I ask some more questions about direction of flow when fitting new zone valves?
My new one is a Siemens 2 port model 2PZV-V22 which is same as the new one I fitted a couple of years ago purchased from Wickes.
Before I tighten gland nuts I would like to confirm which way round the two valves should be fitted?
Instructions with the new Siemens valves say they are for Wickes brand valves not Siemens so is a tad ambiguous!
Wickes Instructions say Port A = water in .... Port B = water out
Daft question: Water in from what? ... Water out to what?
I am assuming direction of flow arrow on pump which is between boiler and zone valves indicates direction of flow through pump? Which then flows to the two zone valves (which both branch from the same single pump pipe).
Is flow sequence Boiler / Pump / Zone valves (In Port A on both valves) then (Out Port B on both valves) Pipework then goes up through ceiling to either hot water tank or upstairs radiators for Central Heating ?
Sorry if this seems a silly query but duff old valve which leaked was fitted with ports reversed to above scenario! Although it is a THC valve (Tower Heating Components) of Tonbridge Kent which is reversed to the new Siemens valves in terms of the 'A' & 'B' embossed on the valve bodies!
I now have doubt in my mind which way to fit valves? Or does it not matter? There is no arrow on either make of valve body I can see?
Thanks
James
