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Unfortunately no one, including Gledhill, ever solved it….it just stopped and…..touching a lot of wood right now, hasn’t returned but I live in constant worry it will come back as it never got solved

Thanks, its so tight i cant get a decent picture of the back of the switchplate with the live in.....it all works im just curious as I would have expected to see a live in for both lights but i guess thats what the jump wire does. It is also all in 1mm....assume thats OK?

Hi All, I have had some wiring done in part of the house to add a second 2 gang switch to 2 separate upstairs lights (one a pendent over the stairs the other a string of LED downlights). The electrician said it easier for him to bring a new live down from the loft and install all new....great...

So.....7 months on and 3 weeks ago I finally got the plumber back and he changed the EV, set the precharge to 2.5bar and all was good.....until this morning when the dreaded noise came back!! Back to the drawing board, any further suggestions as no one, not the plumber, Gledhill or google seem...

Unfortunaely Gledhill dont seem to have an answer, the engineer I am using came on recomendation from Gledhill and has apparetly installed hundreds of similar systems.... The cold water water has a precharge of 4bar but the incoming main has an adjustable monoblock pressure reducing value with...

Thanks for all the help, really appreciate it. Combination PRV valve is set to 3 bar and it was the first thing that got changed.

pump pressure is set to 2bar with a 0.2bar differential, tried increasing the pressure to 3bar but made no difference. It’s 250L tank with a 1.4bar precharge. Pressure rarely fluctuates

Sounds like I need to get the plumber to tinker with the pressure balance. He was telling me everything was balanced as I have an accumulator tank with a mainsboost pump, the pump is set to maintain a pressure of 2bar…..see diagram below.

Downstream pressure is regulated by the accumleator tank which is set to 2bar….are you thinking drop the precharge in the EV to 2bar? I See the logic…

As an update on this one plumber finally came back 2 weeks ago. Fitted a shock arrestor…..did nothing to help. He demounted, drained and depressurised the EV, pumped it back to 3bar and refitted it…..Bingo no noise…..until yesterday when the noise returned….same pattern as before, makes the...

I reckon you might have hit the nail on the head there….prior to the new bathrooms there were no mixer taps and the shower feed passed through an old pump which I bet acted as a non-return valve….now we have 3 mixer showers and 5 mixer taps throughout the house none of which are fed off the...

Really appreciate the help here, plumber has promised me a call this afternoon! what would a balanced cold feed look like? When i stand right next to it with my hand on the EV it sounds like its come from in the EV tank but plumber tells me it could just be reverberating in there from water...

Thanks All, Still waiting on my plumber calling me back.....think he is ignoring me as he doesn't know how to solve it, no point in a warrunty if you cant fix the problem! In relation to the potential faulity mixer tap I tried isolating the ones i could, unfortuntly i cannot isolare the bath...

Thanks, I have queried trapped air on the water side as just before the noise there is a bubbling sound then 5-10 seconds after the tap is opened the reverberation starts, it is defiantly coming from EV tank but I have told as it’s a pressurised system there’s no way air could be on the “wrong”...

I know this has been raised before but no one has ever managed to answer and as I have exactly the same problem I am posting again…..my G3 qualified plumber and Gledhill seem baffled by it….they have re-pressurised the tank, changed the PRV, now they are on about installing a shock arrestor but...

Did you ever get to the bottom of this? We have exactly the same problem. Had an unvented system installed 2 years ago all ready for an extension to be builtand had no issues BUT then had the same plumber back to install the new bathrooms and kitchen plumbing and now have exactly what you...