vfrdave

@Conor did you get it cut up, don't leave us hanging

I have had confirmation this morning that the tap unit has no NRV internal on it. However I had an epiphany this morning, the bath tap unit is in the wall and just has copper blanking tails currently ie no cartridges or taps. In my mind this essentially is allowing the cold and hot water to flow wherever it wishes. I need to install the cartridges on the bath tap and see what testing reveals.

@Temp the only place I can check is beside the TS, after that all pipework is buried in the floor or walls.

One of these https://www.mrcentralheating.co.uk/compression-28mm-x-22mm-3-piece-reducer?utm_source=google_shopping&gclid=Cj0KCQjwoebsBRCHARIsAC3JP0LTI_8w014N-UAh3gnfPP7T-aPWfxyamypw8CibVng_vBHXt0K73IEaAnMNEALw_wcB

You reckon there is room for a compression t and a compression straight either side on the vertical, in place of the multibloc.

I have faith in your advice. Multibloc out and I will report back then.

Honest answer it isn't actually there yet so no concern when the multibloc comes out ?. So action list:- - Multibloc out probably need plumber as I have never soldered. This will hardly sort my bathroom woes. - should I put a nrv on each of those hot 22mm legs? - anything else?

Does the tank prv and tundish not need to connect to it?

That does make sense. So can I just replace the multibloc with a t piece essentially and some more copper? Kitchen is the furthest away and it wasn't too bad when testing yesterday. Fill loops for UFH, small rads circuit and then the boiler circuit.

Interesting cause I didn't think it was needed but there is a reference on the side of the TS saying something about 3bar max which made him insist that it was needed. Yes bathroom cold feeds definitely come off the multiblock.

TS from Trevor

Plumber fitted the TS. There is one of these TRV Multi-blocks ( pressure reducing valve and cold mains PRV combination valve with a balanced outlet for matched pressure reduced cold out to the mixer taps ) which is set at 3 bar, though I think I might want to change it for an adjustable one at some point. What do you mean by get to the ones that are U/S? Manufacturer literature is very poor for both it is more just diagram and measurements. This is the case cold feed comes off the mutibloc and then branches to each of the rooms (3 * bathroom & kitchen/utility). All seems to hinge on a problem in the bathroom, a nrv would sort the other rooms out but how do I sort the bathroom out.

@Nickfromwales any thoughts on this one, I appreciate you are a busy man but if you have 10mins. WhenI get the cartridges out is there anything to look for specifically or is it a case of dodgy tap gubbins.

Anyone know how to slacken these without damaging the chrome. They are only turned onto a few threads just no way to grip them easily

I think I am going to have to pull the tap unit out otherwise I will still really only get tepid water at that tap. An nrv on the hot would sort every other outlet. I just want to sense check my thoughts that the buried tap unit is the issue before I get the cold chisel out. The wall can be patched and tiled over for a nice splashback when we get the proper floating wood shelf for the sink in, Pinterest has alot to answer for. Unfortunately this the bathroom that will be completed to get us in, both ensuites not touched yet.

Nothing in ceilings all comes from the floor. The floor has lovely ufh in it so not easy. Bathroom floor is now tiled also so the wall it might have to be.

Correct my thinking but the only exposed 22mm I have is close to TS if I cut and shut it with a nrv it will only protect circuits to other rooms. I will still have the issue in the bathroom as it is a main 22mm reduced and branched to that room. I would need an nrv at the sink or replace the tap unit both needs digging in the wall.

@JSHarris @Adam E I think my problem is with the tap for the sink rather than the shower. Both however are buried in the wall with no exposed pipework at outlet. Only exposed pipework is close to TS and is the 22mm supplies for each of the various circuits. Sink tap is the easier one to dig out of the wall just not were I want to be when trying to get cleaned up to move in.

How do I get these off without damaging them any further

That is kind of where my stressed scatter brain thinking has got me too. Nearly sure it is the bathroom tap unit which conveniently is buried in the wall. Attempting to strip the tap cartridges out but can't get the thing split. This might help explain it dripping for a period after use. It hasn't much if any use as yet.

Not easily think it would be beyond my skill set.

Further update tested the kitchen with bathroom cold isolated and I get nice piping hot water for 5 mins +. If I throw the cold supply valve to the bathroom to on I run look warm after about a minute in the kitchen. Hot supply to bathroom is as cold as cold one so seems to be back feeding the cold to rest of house. I can only assume my tap is faulty or needs some sort of attention.

@PeterW On the incoming cold to the TS there is a 3 bar prv with a balanced cold to outlets. Outlet from the TS has a blending valve. Both of which are caleffi branded.

I have issues and need urgent help. My shower in bathroom has been tested and works fine on cold and nice piping hot water from thermal store, pressure could be better though. Plumbed sink in (waste only, tap already in wall) and tested the taps and I get cold and only look warm water. When I check shower it is now the same. If I turn cold supply to bathroom off:- - At the sink I get nice piping hot water. With the cold supply off the nice piping hot water also comes when only the cold tap is turned on (mixer tap). - At the shower I also now get nice piping hot water at the shower as well as cold if turned right down. - toilet when flushed is now refilling with warm water. If I restore the cold supply to bathroom:- - checking shower first it seems to be fine - flush the toilet it refills with cold water - run the sink at first it is fine then only look warm at best from warm tap. - retest the shower and can't get the piping hot water. It seems that the cold water is dominant in the bathroom but how is it stopping the hot water. Likewise with no cold water how does the toilet fill with hot. Could it be my basin tap is letting by and water to other outlets taking shortest path. Bathroom supplied via hot & cold 22mm balanced supplies and branched to outlets as needed. I have a bath tap also to match sink tap it is currently untested and just been tiled over!

@Onoff any big difference between SBR and ardex p 51?