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Which kind of valves do I need to prevent backflow issues with the plumbing in my home? Thanks
 
Where in your home is it happening, you have to paint the picture for us to help you.
 
The water supply in my home is contaminated due to backflow issues so I am trying to find out how to prevent this and was told that two types of valves need to installed in the bathroom pipework so I am trying to do a bit of research on this.
 
Clean water supply comes in and waste water goes out.
1 Are you in the UK?
2 Where does your water supply come from?
3 Where does your waste water go to?
 
right i think i know where you coming from

anything that mixes hot and cold

showers, mono style taps etc

to stop this you need to install a single or double check valve just before the valve/tap
 
right i think i know where you coming from

anything that mixes hot and cold

showers, mono style taps etc

to stop this you need to install a single or double check valve just before the valve/tap
Glad you are Shaun, thinking my crystal ball needs a service.

Bobby Joe, is this a new problem? Would rather cure the cause rather than the problem myself.
 
This is exactly right:

right i think i know where you coming from

anything that mixes hot and cold

showers, mono style taps etc

to stop this you need to install a single or double check valve just before the valve/tap
 
This is exactly right:

right i think i know where you coming from

anything that mixes hot and cold

showers, mono style taps etc

to stop this you need to install a single or double check valve just before the valve/tap

normally happens with lets say a shower with no check valves internally

mains cold and tank hot, the more powerful mains pressure will push back up into the hot cylinder and then back into the tank supplying the hot cylinder and cause it to overflow
 
Thank you Shaun, I was trying to figure out what happens if there are no single/double check valves installed. The cold water is fed via the mains and the hot water via a tank, are there dangers from not having the valves in place?
 
Thank you Shaun, I was trying to figure out what happens if there are no single/double check valves installed. The cold water is fed via the mains and the hot water via a tank, are there dangers from not having the valves in place?

yes cross contamination and could be much worse
 
Got thrown a curve ball when you said contaminated. Not a word I would of used for hot and cold water problem.
 
Got thrown a curve ball when you said contaminated. Not a word I would of used for hot and cold water problem.
Sorry I know I wasn't making much sense as I was trying to understand the situation myself and used whatever words came out of my head to best describe it.
 
If you use water which is cross contaminating is this likely to damage your health?

yes and no needs sorting tho

can you explain any more as it sounds like you have had a problem or a plumber out
 
Sorry I know I wasn't making much sense as I was trying to understand the situation myself and used whatever words came out of my head to best describe it.
No worries, bit like talking to a customer via a phone call, just takes longer via a forum.
 
Got thrown a curve ball when you said contaminated. Not a word I would of used for hot and cold water problem.

sorry had my commercial hse hat on :D
 
Long story but I moved into a flat and within months had come out in a rash, over time my skin worsened (looked like burns) as did my health yet no one could figure out what the issue was. I moved out for a while back to a friends house and my health improved then I returned back to my flat and the same situation occurred, countless visits to skin specialists. The landlord and I had agreed to low rent for a fixed period of time as long as I took care of fixing things which I agreed to as he spends a lot of time abroad, I didn't think there would any issues as he had the place refurbished and the bathroom had a new suite installed.

There was a leak last month and I had a reliable/verified plumber come out, he checked everything and noticed that in the bathroom the plumbing was incorrect and mentioned the words "cross contamination". I told him about my skin etc.. and he said this was most likely the cause, I contacted the landlord who said that "he couldn't remember who carried out the work for the bathroom" and that no one else had a issue with it but then again the flat was empty after refurbishment and along came stupid me.
This is the reason I am trying to find out what causes cross contamination, the health implications and how to fix it.
 
Long story but I moved into a flat and within months had come out in a rash, over time my skin worsened (looked like burns) as did my health yet no one could figure out what the issue was. I moved out for a while back to a friends house and my health improved then I returned back to my flat and the same situation occurred, countless visits to skin specialists. The landlord and I had agreed to low rent for a fixed period of time as long as I took care of fixing things which I agreed to as he spends a lot of time abroad, I didn't think there would any issues as he had the place refurbished and the bathroom had a new suite installed.

There was a leak last month and I had a reliable/verified plumber come out, he checked everything and noticed that in the bathroom the plumbing was incorrect and mentioned the words "cross contamination". I told him about my skin etc.. and he said this was most likely the cause, I contacted the landlord who said that "he couldn't remember who carried out the work for the bathroom" and that no one else had a issue with it but then again the flat was empty after refurbishment and along came stupid me.
This is the reason I am trying to find out what causes cross contamination, the health implications and how to fix it.

tbh its your landlords responsibility to sort / fix things

do you have a combi boiler or a cylinder?
 
A combi boiler and just before I moved in there was a cylinder, which is why the landlord decided to fit a new bathroom suite.
 
A combi boiler and just before I moved in there was a cylinder, which is why the landlord decided to fit a new bathroom suite.

as its a combi boiler you wont have cross contamination, and shouldn't need to fit check valves

as its equal pressures
 
The only time you may get cold going into the hot supply, and that would be only if the particular shower you have supposed to have check valves. Then you would be questioning the temperature of your water. Even this would not cause contamination to your water.
 
Run the cold a little before brushing your teeth if you are worried .
Check it is cold !
( Drinking what comes out of an old copper/soldered cylinder more of a worry ! )
 
Just out of interest, a few questions.

1. Does anybody else in your family come out in a rash?

2. Do you have a water softerner?

3. Where does you water come from?
(E.g.. mains or other supply).
 
Legionnaires' disease - Wikipedia
Doesnt sound like it though?
Could it be a dead leg or possibly some other household on the same supply eg next door with an unvented system
And a pumped hot mains cold w/o check valves?
Hi everyonebtw,sorry for my twopenneth, just interested as ive come across aa similar problem with a stuart turner single impeller hunting due to lack of check valves....
 
Is your toilet cistern fill valve set correctly.
I ask because I have seen a video of a toilet cistern that had been flushed.

It then filled up over the height of fill valve, then the water was being sucked back out of cistern.

They turned on the kitchen tap, and it was blue from the cistern block, other neighbours were reporting blue water as well.

A plumber who works for WRAS came to our college and played this video, the water came in then it went back out.
 
Could be a dead leg as diptin said, the muck will collect then at some point it is pulled into the system and out the tap.
 
normally happens with lets say a shower with no check valves internally

mains cold and tank hot, the more powerful mains pressure will push back up into the hot cylinder and then back into the tank supplying the hot cylinder and cause it to overflow
What contamination issue is that then.
 
It's more likely the chlorine content in your water is high. buy a good quality shower head with a chlorine filter
 
Only a view I know, but I feel its best to call the water board and get one of their senior guys out to make sure everything in the hse is properly installed vis-a-vis back-flow protection, dead legs etc. Basically, with it affecting his health, he needs the whole system to be given the clean bill of health he needs to carry on living there.
 
Only a view I know, but I feel its best to call the water board and get one of their senior guys out to make sure everything in the hse is properly installed vis-a-vis back-flow protection, dead legs etc. Basically, with it affecting his health, he needs the whole system to be given the clean bill of health he needs to carry on living there.
Good point they can easily check the water too see just what the problem is...
 
In the other and first thread on this he said it was to do with the hot side of the water and somehow proved this.
Just mention this as we seem to be looking at the cold side of things now
 
Diagnosing a rash , is often about a change in surroundings washing powder ,dusty carpets,rough towels ( and even just the stress of moving ) .
I difinitly have an adversion to some Bio washing powders and pollen
, my father gets his from Glass fibre loft insulation .
Wishing Bobby Joe - an easy fix ( finding it is the problem )
 
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