I asked a specific question about 3pvs. Have you got anything to contribute or are you just intentionally wasting bandwidth?
(Why is that everytime someone posts something on this forum it starts an inquisition? It's only a central heating system, not quantum physics.)
Your know-it-all attitude and arrogance are astounding considering you have come to the forum for advice. Concerning a heating system YOU can't seem to diagnose or fix. Without help.
And you won't be receiving any more of mine, you obnoxious little man.....
Bolshy I feel that your comments to the OP are not really constructive but completely up to you how you respond to any comment on here, but please leave it to us to sort out the OPs problem as it is so easy for a post on here to get Hi-Jacked with people slagging each other off , cheers for your input