Beach Hut
Brighton Bhuna Boy
I am sure a plumber with 45 years experience will come up with a respectable answer shortly
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[Help] Plumbing problem - over flow pipe issue when hose attached to cold water supply.
- Thread starter METALMICKY
- Start date
BensGrandad
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Beach Hut
Brighton Bhuna Boy
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You're a very naughty boy
Baldseagull
Well-known member
The cold mains pressure water is flowing back up the hot pipe, through the hotwater tank into the coldwater storage tank which is overflowing out of the warning pipe. Regardless of whether you wish to fill a paddling pool or not, you should get non return valves fitted to your kitchen tap supplies. But for now, it should only happen if both hot and cold side are turned on, so just turn the cold on.
LowKarate
New member
I am not a plumber.
Hopefully that clarifies sufficiently.
Hopefully that clarifies sufficiently.
Saltydog
New member
Have you checked the plug?
METALMICKY
Well-known member
- Jan 30, 2004
- 6,058
- Thread starter
- #27
Thank you for the few sensible suggestions. However, the standard of the jokes ones was poor although the swimming pool ones made me laugh. As for " have you tried turning it off and off again " is 30 seconds of your life you won't get back :+
LamieRobertson
Not awoke
which seem to follow quite a lot of your posts
As suggested in post #24, did you have the hot and cold open on the kitchen mixer when using the hose?
Gazwag
5 millionth post poster
Westdene Wonder
New member
Now you have explained the situation in these simple words its obvious you are spot on
Cheshire Cat
The most curious thing..
Forget the paddling pool, and just dump the toddlers in the bath until they stop grizzling.
Bold Seagull
strong and stable with me, or...
You must be Hove Actually if you were trying to fill the paddling pool with cold AND hot water!!??
Baldseagull
Well-known member
If the hot side is closed, the mains can't flow back up the hot pipe.
Two questions to clarify
If you were to not fit a hose to the kitchen tap but just let it run cold to waste for the same time would the over flow then leak?
Am I right in assuming your heating hot water system has a storage hot water cylinder in an airing cupboard?
Or have you a combi boiler and no hot water cylinder?
My thoughts are the mono block tap is letting by between cold and hot, the cold water being mains pressure overcomes the hot water pressure which in this case is not mains pressure, therefore the hot is feed via a hot water storage cylinder which in turn is topped up via a header tank in the loft.
The cold water under mains pressure is forcing water back up the pipe to the hot water cylinder, now we have two possibilities at this point the water could be coming out of a safety valve fitted to the hot water cyclinder or the heating coil in the hot water cylinder which in turn forces the water back up the hot water top up then onto the tank in the loft which fills until it reaches its overflow level, answer non return valve needs to be fitted to the outgoing pipe from hot water cylinder plus tap in kitchen Probably has a ceramic seat that's worn and needs replacing and finally fit an outside tap or you do have a combi boiler and its internal mixing valve is letting by and water is coming out of the boiler safety valve
If you were to not fit a hose to the kitchen tap but just let it run cold to waste for the same time would the over flow then leak?
Am I right in assuming your heating hot water system has a storage hot water cylinder in an airing cupboard?
Or have you a combi boiler and no hot water cylinder?
My thoughts are the mono block tap is letting by between cold and hot, the cold water being mains pressure overcomes the hot water pressure which in this case is not mains pressure, therefore the hot is feed via a hot water storage cylinder which in turn is topped up via a header tank in the loft.
The cold water under mains pressure is forcing water back up the pipe to the hot water cylinder, now we have two possibilities at this point the water could be coming out of a safety valve fitted to the hot water cyclinder or the heating coil in the hot water cylinder which in turn forces the water back up the hot water top up then onto the tank in the loft which fills until it reaches its overflow level, answer non return valve needs to be fitted to the outgoing pipe from hot water cylinder plus tap in kitchen Probably has a ceramic seat that's worn and needs replacing and finally fit an outside tap or you do have a combi boiler and its internal mixing valve is letting by and water is coming out of the boiler safety valve
Last edited:
METALMICKY
Well-known member
- Jan 30, 2004
- 6,058
- Thread starter
- #36
Thanks Blue 3. Very helpful response. In answer to your first question with the tap just running nothing will come from the overflow.
Your description of my set up is spot on. Hot water cylinder in airing cupboard and tank in loft.
So am I correct in saying that the other stuff you describe will also need to be done and just biting the bullet and getting an outside tap fitted is not the whole story.
Cheers
Your description of my set up is spot on. Hot water cylinder in airing cupboard and tank in loft.
So am I correct in saying that the other stuff you describe will also need to be done and just biting the bullet and getting an outside tap fitted is not the whole story.
Cheers
LamieRobertson
Not awoke
Don’t done of those hose valves stop water coming out ..erm this maybe entirely irrelevant in which case i’m Blaming too much sun
Metal Micky glad I was able to be of assistance just confirm There is a requirement for a separation between hot and cold water ultimately to ensure no non potable water enters the water distribution system the thought is if cold water can force its way from cold to hot then in certain circumstances it could force its way hot to cold so to answer your question yes mixer tap needs to be repaired or preferably replaced with integral none return valves already fitted, non return valve should be fitted to any outside tap and finally the hot water cyclinder outflow needs a non return valve belts and braces
Justice
Dangerous Idiot
This reminds me of many of my customers hours spent self diagnosing something they know nothing about. I know the problem most of the time before I've arrived and 9-10 it's a simple fix. Call a professional that why we are here.