new member and advice needed

[beepalm]

Hi all, I am a newbie looking for some sound advice and reading through your website I feel as though I have come to the right place. Last week I had a new central heating system fitted, the old one was a gravity-fed, gas boiler hot water tank type. The new one is a mains-fed combi type, all new radiators were fitted and I am happy with the installation. I have two queries - one, the hot water tap in the bathroom and kitchen(I live in a bungalow) started "screaming" and when turned off quickly the pipes kind of reverberate. The engineer came but said he couldn't do anything as the pressure was too high, he turned the pressure down on the boiler just a smidgeon but it made no difference. Any ideas? Second, 3 of the radiators have been fitted with no backs on them - is this correct? Thanks for any advice.

 

[shorticus]

Sounds like water hammer caused by incorrectly/inadequately clipped pipework, if you have high water pressure it'll exasperate it.
What do you mean by no backs on your radiators?
Could you post a photo?

 

[PlumbBobBob]

sound like single radiators with fins at the back

 

[Reg Man]

So he did'nt fit a presssure reducing valve and expansion vessel on thr main input?

 

[fuzzy]

prv needed