Hot water from cold tap help

[Marydene]

Hi I am getting hot water through the cold tap, could this be a TMV problem? TIA

 

[Aquarius]

Mary,

It could be a couple of things. How hot is the water? You could have a hot pipe under a cold pipe, you could have a mixer tap, that’s getting hot water into it. Any work done recently?

 

[Chuck]

Hi I am getting hot water through the cold tap, could this be a TMV problem?

Look for any device (shower, TMV, mixer tap) that mixes hot and cold water. Check the temperature of both inlet pipes (a finger will do). Run the tap-that-should-be-cold until it's coming out hot. Recheck the mixing devices, if one now has both inlet pipes hot that's the culprit. It needs fixing and non-return valves (NRVs) fitted.

 

[Marydene]

Look for any device (shower, TMV, mixer tap) that mixes hot and cold water. Check the temperature of both inlet pipes (a finger will do). Run the tap-that-should-be-cold until it's coming out hot. Recheck the mixing devices, if one now has both inlet pipes hot that's the culprit. It needs fixing and non-return valves (NRVs) fitted.
Thanks for your reply, the cold water is getting up to 45 degrees Centigrade. There is a TMV which I have replaced but hasn't solved the problem. I don't have NRV's fitted. It seems from your reply I should try that next. It's not a new installation this problem has occurred recently.

Look for any device (shower, TMV, mixer tap) that mixes hot and cold water. Check the temperature of both inlet pipes (a finger will do). Run the tap-that-should-be-cold until it's coming out hot. Recheck the mixing devices, if one now has both inlet pipes hot that's the culprit. It needs fixing and non-return valves (NRVs) fitted.

Many thanks for your reply, the water is quite hot certainly as hot as the hot tap. I have changed the TMV but this hasn't solved the problem. From your reply I think fitting NRV's is the next thing to do. It's not a new installation this problem had only occurred recently. Thanks for your advice.
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Mary,

It could be a couple of things. How hot is the water? You could have a hot pipe under a cold pipe, you could have a mixer tap, that’s getting hot water into it. Any work done recently?

Hi Thanks for your advice, it's not a new installation but problem that had just occurred. The water is coming out just as hot as the hot tap but in waves of hit then cooler then warm again. I don't have NRV's fitted. I've been advised to fit them do I will try that next. Thanks for your help