Would a check-valve fix my mixer problem?

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Hi

I'm getting some cross over of cold water into hot water at a shower mixer valve. The mixer valve is difficult and expensive to replace, so I was wondering, if I fitted a check valve to the hot and cold water inlets would that prevent the cold water from entering the hot water stuff?

Thanks
 
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yep a check valve on the hot will stop the cold crossing over.
 
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Err, isn't that what shower mixers are supposed to do?

What, exactly, do you mean by "cold water...entering the hot water stuff"?

Possible pre-emptive suggestions:
Pressure equalising valve
Flow restrictors to equalise flow rates
 
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Now I've reade your other post on this same subject, ignore the above.
Fit a check valve.
 
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