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thanks for all the advice, much appreciated. mark

3 mixers are served by mains pressure cold and vented hot. bases of cold and f&e tanks are level. cold tank only supplies hot cylinder. cheers

. i have posted this item elsewhere on this forum but a customer of mine is having problems. the cold water tank is overflowing. after changing ball valve i was called back as tank was overflowing again. cold water tank is back filling from cold feed to hot cylinder. house has three mixer taps...

thanks fellas. could i fit a check valve on hot feed from cold tank rather than on individual taps or is this a no no? i only ask cause bath mixer is a bitch to get to , means removing toilet and basin. regards, mark.

bases same level. also wouldnt the hot water be discoloured as it is clear.

but wouldnt the expansion tank overflow, not the cold water?

thanks for your help lads, heres another one for you. cold water tank is being back filled from feed to cylinder and tank keeps overflowing. it makes sense to me that hot and cold are crossing somewhere. house has three mixer taps and washing machine. my next step is to install check valves on...

hi tony. thanks for reply. i have been plumbing domestically for about 3 years. i am qualified to NVQ level 2, but as i am sure you know not everything is covered in coursework and most of what you do learn is learnt on the job so to speak. i have never come across this problem before and the...

thanks. i have come home for the evening, so im not sure about upstairs rads til tomorrow, but what bearing does this have? i think one of the upstairs rads was not getting warm from one side. thanks.

Hi. thanks for reply but is there any other way than powerflush? the discharge did not occur for first 4 times, only on last time. i also changed some lockshields for thermostats on last flush through. could they be a problem?thanks a million.

Hi. please advise me. i have drained the water from the heating side to change some radiators. i noticed water was black so i filled it back up and the water became clearer so i repeated 4 or 5 times. but now when i turn on heating water discharges from the vent in feed and expansion tank. can...