Bristan Calico Bar Mixer Shower Non-Return Valves where ?

[wanleg]

Hi,

I thought I originally had a boiler problem but turned out my Bristan Calico bar mixer shower valve is passing cold water into the hot water circuit.

I phoned Bristan to ask about this and the guy on customer support told me that the non-return valve on the hot side of the mixer must be either faulty or stuck open. He advise me to remove the valve and have a look.

I have removed the valve and stripped everything I can see out of the body but can't see what I would think to be a non-return valve....anyone know where this is likely to be or what it is likely to look like ?

Cheers

 

[Whitespirit66]

Not sure about the internals of your valve. May be easier to fit a non-return valve to the hot pipe supplying the shower, if you can access it.

http://www.screwfix.com/prods/14639/Plumbing/Pegler-Brassware/Pegler-Single-Check-Valve-15mm

 

[wanleg]

well I stripped down the valve yesterday and could not see any non-return valve...and when I reassembled and tested the shower did not seem to be passing cold water into the hot circuit any more but the shower itself just doesn't get hot enough even on the highest setting...I even put the water temp. up on the boiler this morning by 5 degrees and that seemed to make no noticeable difference....I'm going to call Bristan again tomorrow but does this sound like a faulty cartridge ?

 

[seco services]

the instructions for your valve don't show any nrv's.
now you have stripped it down you may need to reset the max temp.

follow the instructions in the manual.

 

[wanleg]

now you have stripped it down you may need to reset the max temp.

follow the instructions in the manual.

I had a look again tonight....I tested with the cartridge screwed all the way in and out but the temp. did not change...I also check the service valve on the hot and it's fully open

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