Header/expansion tank filling with hot water

[seco services]

Right I have isolator valves either side of the pump. I take it then if I replace the isolator vale on the 'out' side of the pump with a non-return valve then it would stop this back flow and if I needed to replace/repair the pump then the non-return valve would stop the water coming out when I take it off.

i would still fit the isolation valve.

Regarding the bath tap no it's not pumped. Because the tap is lower than the shower head it seems to run OK albeit a bit weak. It would take a long time to fill the bath though.

whats this bit then about the pipes split from the bath ?
(where the isolation valves are (compression fittings) just after they split from the bath feeds,)

Don't bother trying to fix the mixer then

that would be a better solution if you can strip it down as the non returns means the mixer will have to be disconnected in the wall and come out to free the valve.

what make/model mixer is it ?

Is this a common problem?

quite common.
but then its not ideal to have you mixer on mains cold pumped hot.
work better on equal pressures.

whats the height distance from your head to the base of the cws in the loft ?

 

[Ziderman]

The pipes come up from the floor under the bath split towards the bath (with isolators) and off to the shower, (with isolators) via the pump (with it's own isolators).

I have no idea what make the mixer is, Hudson and something (Reed?)rings a bell. I know it had to go on upside down though, can't remember why, something to do with the slide rail it came with.

Is there one you can get that does both jobs, it would save me a huge amount of effort.

 

[seco services]

The pipes come up from the floor under the bath split towards the bath (with isolators) and off to the shower, (with isolators) via the pump (with it's own isolators).

sharing the same supply from the cylinder

I have no idea what make the mixer is, Hudson and something (Reed?)rings a bell. I know it had to go on upside down though, can't remember why, something to do with the slide rail it came with.

hudson reed good shower.

Is there one you can get that does both jobs, it would save me a huge amount of effort.

no

 

[Ziderman]

My wife managed to find the manual that came with the mixer, the non-return valve look as though I should be able to get to them as they are either side of the mixer controls.

I am reluctant to peel the cover plate off the wall until I know whether they are likely to be jammed in which case I could free or knackered which would involve replacing them.

 

[seco services]

yes on either side but you can't useally get them out without removing mixer but once you have undone the hot/cold pite it should come out.

 

[Ziderman]

There appears to be screws which I could access if I remove the plate but I can't find any further information on what might have happened or how to fix it.

At least I've isolated the problem, just need to find a way round it. Seems a shame to fit more non-return valves if they are already there.

 

[seco services]

what name is on the shower manual ?

 

[Ziderman]

There isn't one. Wish I had a working scanner!

The A3004 seems to be coined by a number of comapnies including Hudson Reed, Ultra, Mitre, Monet, Rialto etc.

I have a phone number so I think I'll give them a bell tomorrow and see if they think I can access the bits and re-seat, reset the valves.

Really appreciate all the help you've given me today.

Top work!

 

[seco services]

has it got two controls on it vertically placed ?

 

[Ziderman]

Yes.

And there are what look like (from the install diagram) two grub screws either side listed as non-return valve housings

 

[seco services]

Yes.

And there are what look like (from the install diagram) two grub screws either side listed as non-return valve housings

yes sounds about right but can't picture haven't worked on a hudson reed for ages and their manuals are a bugger to get hold of.
as you say shame you haven't got your scanner.

have a look through this manual is it the same body as yours ?

HUDSON REED

 

[Ziderman]

Yep, identical.

 

[Ziderman]

Actually, mine doesn't have the 'with invertor' bit

 

[Ziderman]

I have been sent a set of the non-return valve from the mixer supplier and I have chopped away some tiles so I can reach the non-return valves housings.

They appear as penny shaped screws but have a scooped notch rather than one that would logically take a flat blade screwdriver. There is not enough of a shoulder to get grips on them and I have bent three coind trying to undo them.

Is there a specialist tool for gettin these off or am I going to have to call in the pro's?

Thanks in advance.

Image added to my library of the mixer, not sure how to drop it into the post though.