hi all my first post here but have been learning so much. 2 weeks ago i didn't even know what an expansion tank was!!
anyway the situation. House 23 years old. had new boiler 18 months ago (open vented system with hot water tank in loft). when i was in loft i noticed that the small expansion tank had hot water in. did a bit of research and cleaned out tank. took all water out by hand and was a bit of sludge in bottom but not huge. cleaned out and refilled. managed at same time o shear off the old metal ballcock so replaced withba nice new plastic one.
the hot water was bothering me so after reading a few posts here have investigated further. took a magnet up with me but either the magnet wasn't strong enough or there was no build up in pipes. managed to feed something up the pipe that goes into the tank with a right hand bend in. managed to get past bend and wiggle about and no muck seemed to come out.
at this point waster was cold and water and ch off. switched on hw only and after about 15 minutes the water in exp tank got warm. was watching all this time and nothing was going in via the ballcock arm lever and nothing was going out via the overfeed tube so i have assumed that no water was going in. It seemed that the water was getting hot purely due to the copper pipe that i had previously checked . I followed pipe which went up across then down into bathroom below where hot water tank was.
I don't have any problems with cold spots in rads and last week with friends help changed one original radiator. bit of sludge but to my mind not much but don't know what to compare to really.
Initially i thought problem may have been from pump so turned down from 2 to 1 and also turned temp on water tank to 60. but if just when i was there the ch wasn't on then am i right in saying its not a problem with pump but elsewhere?
if anyone can point me into direction of what i can do about the hot water in exp tank i wd be grateful.
anyway the situation. House 23 years old. had new boiler 18 months ago (open vented system with hot water tank in loft). when i was in loft i noticed that the small expansion tank had hot water in. did a bit of research and cleaned out tank. took all water out by hand and was a bit of sludge in bottom but not huge. cleaned out and refilled. managed at same time o shear off the old metal ballcock so replaced withba nice new plastic one.
the hot water was bothering me so after reading a few posts here have investigated further. took a magnet up with me but either the magnet wasn't strong enough or there was no build up in pipes. managed to feed something up the pipe that goes into the tank with a right hand bend in. managed to get past bend and wiggle about and no muck seemed to come out.
at this point waster was cold and water and ch off. switched on hw only and after about 15 minutes the water in exp tank got warm. was watching all this time and nothing was going in via the ballcock arm lever and nothing was going out via the overfeed tube so i have assumed that no water was going in. It seemed that the water was getting hot purely due to the copper pipe that i had previously checked . I followed pipe which went up across then down into bathroom below where hot water tank was.
I don't have any problems with cold spots in rads and last week with friends help changed one original radiator. bit of sludge but to my mind not much but don't know what to compare to really.
Initially i thought problem may have been from pump so turned down from 2 to 1 and also turned temp on water tank to 60. but if just when i was there the ch wasn't on then am i right in saying its not a problem with pump but elsewhere?
if anyone can point me into direction of what i can do about the hot water in exp tank i wd be grateful.
