Attention: Please take a moment to consider our terms and conditions before posting.
Any plumbers on here?

robroy
Posts: 4,426
Quick question. I have a combi boiler and don’t have an issue all over my house with the water and heat. However, in the main bathroom upstairs the bath just does not run hot and is luke warm at best, the water also comes out cloudy for most of the time. The rest of the house is fine.
I believe the pipes up stairs are old compared to the new extension and boiler.
Not sure why it’s cloudy.
cheers
Not sure why it’s cloudy.
cheers
0
Comments
-
The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy
0 -
Big_Bad_World said:The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy0 -
robroy said:Big_Bad_World said:The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy0 -
robroy said:Big_Bad_World said:The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy
It just meant if I wanted to have a bath I'd have to start running it three days before. ;-)0 -
robroy said:Big_Bad_World said:The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy
Believe this is an American site (continued use of faucet is the give-away) but covers some potential solutions if not the TMV:
https://homeguides.sfgate.com/would-cause-bathroom-not-hot-water-tub-only-91662.html
0 -
Thanks all, I’ve tried the tap on half open and it’s still warm. Just annoying when trying to run a bath for the toddler0
-
Big_Bad_World said:The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy4 -
AddicksAddict said:Big_Bad_World said:The water from combi boilers is heated directly from the mains, so the only time the water is released to the atmosphere is when it comes out of the tap. This means that during heating, the calcium bi-carbonate present in the water changes to calcium carbonate. This causes the creation of Carbon Dioxide which close up is seen as millions of bubbles, this is not sediment it's merely cosmetic. If you run some hot water into a glass and let it cool it will slowly clear. This phenomenon is more apparent in hard water areas and from models with perhaps slower and/or lower flow rates.
https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy2 -
Quick question how come a bricklayer can lay bricks but a plumber cannot lay plumbs?.1
-
Indianaaddick said:Quick question how come a bricklayer can lay bricks but a plumber cannot lay plumbs?.3
- Sponsored links:
-
To answer the original question.Probably.0
-
Can be alot of things, domestic heat exchanger in boiler , flow rate to high for boiler model , are the taps thermostatic ? , you will find the bath is normally the issue as bigger taps = more flow plus we tend to run longer than a sink so we notice.
This week i went yo a job that had same issue and 6 other visits from various work buddies, they all missed the problem. It was the shower mixer, cold water backing through the hot and cooling it down. Just try to turn any mixers in your house to fully hot and then try the bath. Easy test. My hunch would be the heat exchanger tho. Good luck2 -
I once called my plumber Neil a "plumber". He got all tetchy and explained he was a "heating, ventilation and air conditioning engineer" not a "plumber".0