Hi all - hope you can help. We appear to have an airlock in the hot and cold water system. Water does not come out of either the hot or cold taps. İ have run maıns water through each tap and everything seems ok for a while then the problem reoccurs and water will not come out of either tap. The cold water tank in the loft is full up. Any suggestıons please? Thank you. PS. A shower pump runs off the bath taps to feed a power shower - I don't know if this is relevant?
Airlock in water system
- Thread starter carlsbergy
- Start date
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Could be the shower pump, sounds like a terrible installation. The pump should have it's own dedicated cold feed coming from the loft tank, and a dedicated hot feed off the hot water cylinder either as a Surrey or an Essex Flange.
Try running mains to the hot and cold again to clear the airlock (give it a good long flush to make sure, but be careful not to overflow the loft tank) then carry on as normal for longer a day or two longer than it normally takes for the problem to reoccur but without using the shower (you have a bath so you can still get clean...) if everything seems OK use the shower and see if the problem returns, if it does then this is what is causing it.
It may also be that the shower pump is draining the loft tank, in which case it's undersized and needs upgrading. Move the pump feeds to the correct positions at the same time.
Try running mains to the hot and cold again to clear the airlock (give it a good long flush to make sure, but be careful not to overflow the loft tank) then carry on as normal for longer a day or two longer than it normally takes for the problem to reoccur but without using the shower (you have a bath so you can still get clean...) if everything seems OK use the shower and see if the problem returns, if it does then this is what is causing it.
It may also be that the shower pump is draining the loft tank, in which case it's undersized and needs upgrading. Move the pump feeds to the correct positions at the same time.
Thanks for response, agree shower pump is incorrectly installed.
C
charliechaplinspants
Are you saying that you have an airlock in your cold water mains?
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No Charlie, the airlock is in the low pressure system
C
charliechaplinspants
From his cold taps, isn`t that mains pressure, how can a mains fed tap be airlocked? I`m not trying to be clever, it`s a genuine question.
No, I understand from his description that he has low pressure hot and cold systems in his bathroom, and that he has run a mains feed from somewhere else to back-feed the taps to try to clear the airlock. You are quite correct that a mains tap wouldn't airlock.
C
charliechaplinspants
Right, got it, his bathroom cold supply is tank fed, thanks, not unusual for low pressure mains supplies years ago, I believe.
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