Problems with new boiler part II

[Klactol]

Evening all! Thanks to all who offered advice about my new boiler (thread started 4 days ago). To summarise, my new Baxi Duo Tec boiler is making a loud banging/vibrating noise when I use the shower/hot water. My fitter, Transco and Baxi engineer all think it is because I live in a low pressure area - 18 mbar at the meter, 16/17 at the boiler. Baxi instruction booklet says preferred gas supply for the boiler is 20 mbar.

It's now been suggested to me by a plumber that it could be a water pressure problem rather than a gas supply problem? He suggested that my water pressure could be too high, hence the banging when I run hot water - it doesn't happen when my central heating is on.

Obviously this means nothing to me -does this sound feasible? Is it worth reducing my water pressure to give it a try?

Any advice will be gratefully received.

 

[Bartdude]

Has the water pressure been measured?

 

[Klactol]

Sorry if I sound thick, but how would I know? Should my fitter have measured it when fitting the boiler? Or is it worth asking him to come back to measure it?

 

[Puddle]

If transco and baxi say its down to low gas pressure it probably is,however if installer thinks water pressure to blame,for the sake of a few quid ,ask him to fit a pressure reducing valve and see how it goes,if it works,maybe pay for part and he can give the 1/2 labour to fit it ,just as quick as checking it.Is the plumber local, he should know his area,s services

imho