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@opps - I will need to put the foam idea to the plumber - I do think noise is coming from pipes in a boxed section @Alec_t - I don't think I have a water tank with a float valve @denso 13 - Yes the main stopcock in the house was replaced Thanks everyone for your replies

Shower pressure is already borderline as had a pump on the shower when it was vented and now it's unvented shower not as good. Don't understand why all the noise from all the taps and toilets is located in one part of the house. Might have to investigate getting the arrestors you mentioned

thanks...if I reduce water pressure at mains will that affect the pressure of shower or is that controlled by the unvented cylinder?

I seem to have a problem with a banging sound in one upstairs room (bathroom). When the toilet is flushed and sink tap closed I get a banging sound in one corner. I also get the same sound in the same place when I flush a downstairs toilet. I also get same sound when I close a kitchen tap which...

I'm not judging my plumber based on a few posts on this forum My confidence in my plumber isn't high for a numbers of reasons 1) It took me a year of chasing to get him to complete the commissioning document. He didn't register the boiler with Vaillant so my 10yr warranty was worthless. And...

what do you think the problem might be?

thanks - some of my noisy radiators do not have TRVs ( bathrooms and Hallway where the Thermostat was originally fitted)

General question - is it reasonable to ask my installer if he balanced system after powerflush, new boiler, new cylinder and three new radiators? I'm putting together a list of things I want my installer to look at when I ask him to come back

Effort appreciated

Flow pipe warming up before the return on the boiler. The flow pipe connecting to HW cylinder (top pipe) is warm but not as warm as the flow pipe going into boiler although they are connected to same pipework.

Heating is on and right now top on is hot and bottom one cold. What's the best time to check which pipe gets warm first?

Cylinder connections https://www.dropbox.com/s/4xkennnxju5n5j8/2020-12-23%2023.23.36.jpg?raw=1 https://www.dropbox.com/s/ctvk0b4veujmp7d/2020-12-23%2023.23.57.jpg?raw=1

I will try again

two pics showing cylinder connections *** You can insert pics using copy and paste ***

posted a pic about hour ago but needs to approved before it's shown...will try to post it again *** You can insert pics using copy and paste ***

Hi Ian i think I have figured it out - the flow and return on the cylinder coil match up with the flow and return on the boiler

I've attached a picture of my HW cylinder - not sure where to look to check if flow and return to coil is reversed *** You can insert pics using copy and paste ***

no...the old system was perfectly installed and had no issues for 14 years. Unfortunately that plumber had retired so went for a new guy. The old plumber checked everything and his installation looked very impressive. Can't say the same about the new guy who took a year to complete the...

Credit to your Dad for being switched on enough to know what to look out for - Unfortunately I'm learning the hard way

I agree - I am concerned the installer didn't do the obvious checks despite having credentials and recommendations. I will give him the chance to put it right but my confidence is not high. On your point about the pump setting, I agree. It made no sense to me to put the pump speed higher so I...