Where to get non-return / Check Valve Insert (3/4" 20mm)

SFK

Joined
23 Jul 2010
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Location
Oxfordshire
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United Kingdom
All,
For my thermostatic Bath taps I cannot find anyone supplying non-return / Check Valve inserts with o-ring and with an outer diameter of 3/4" / 20mm. It is the same thing that goes into the back of a bar shower, but has a larger outer diameter.

I need a new one as the plastic has failed on mine allowing cold water back into hot water side.

I have time looking with a combination of the above words, but not found anything in UK. The best I have found is this, but in USA and looks like a 1/2": http://www.partstown.com/antunes/rou2170127

Please can anyone assist in a possible suppliers or suggest better search words.

With thanks, SFK
s_Valve_cr.jpg
 
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Stick a couple of standard check valves on the hot and cold supplies,.
 
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Reactions: SFK
Picasso,
Thank you. Adding standard check valves is my next step if I cannot find these plastic bits. I was hoping (obviously naively) that I could be lazy and cheap and simply replace the plastic bits.
Thanks again, SFK
 
Why is it backflowing, are your hot and cold supplies to the shower not from a balanced supply? If the hot supply is LP then is there one in the hot side you could swap over?
 
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Madrab,
My flow rate is low, and the hot and cold flow rates are a little un-balanced (I presumed from the flow resistance of the boiler heating plates).

Last year my shower started getting cooler, and it was suggested that "Possibly a mixer is passing between the hot and cold". I found it was actually my Bath Mixer that was passing between the hot and cold and was affecting my shower. As a quick fix I left the Bath Tap thermostat on 'hot' as this stopped back flow. Read more: //www.diynot.com/diy/threads/h...ks-worcester-r25-r30-he.447865/#ixzz4J6JNqtRt

Today I had some time so had a look and found that the I found that the Bath Mixer had a failed check valve on the hot side and soon to fail on cold side. So started my failed search of a simple replacement.

Good suggestion to remove from cold side and put on hot, but I think both are failing (weak plastic).

sfk
 

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