A
action jackson
Evening all.
I'm a regular user of the tiling forum but have popped over here to see if someone can help me work out what the problem is with my hot water flow issue? I have already had a plumber in but he is struggling to work out the problem.
I live in a first floor flat and believe i have a mains pressure, vented hot water system with 2 x electric immersion heaters. I'm by no means an expert but i believe the system consists of a water cylinder with internal coil, a separate header tank, an expansion vessel and a thermostatic mixing valve.
The issue i have is that the hot water flow has dropped off dramatically in the last couple of weeks, making it un-useable for running a bath or having a shower. Another issue that may be related is the header tank in the cylinder is continually overflowing and running through the overflow pipe. I haven't experienced this in the last 7 yrs.
About 2 months ago i had a whirlpool bath fitted with a concealed dornbrachet mixer unit and thermostatic control for bath and shower. No problems were experienced when initially installed.
The pressure in the expansion vessel was checked on Friday and was zero psi. I have pumped up to 1 bar and so far the pressure has remained stable, although it hasn't fixed the problem.
I was advised that maybe the thermostatic mixer valve for the shower/bath could be letting mains pressure pass into the hot water circuit due to the in balance with hot and cold? Is this possible and would this cause the water level in the cylinder to rise?
I should also add that the tank was removed 3 weeks ago because i though we had a crack in the cylinder, but we couldn't find any problems with the cylinder (blanked off and filled outside with cold water for 24 hours). We now think that the leak was actually coming from the overflow pipe in the header section of the cylinder which has now been fixed.
Lastly i recall checking the header part of the cylinder a couple of years ago and noticed it was bone dry! I wasn't sure why but as everything was working i didn't worry about it. (a guy at work is ex plumber and couldn't understand why i had a header tank in the cylinder for this type of system) Now the water is brimming out the top and continually overflowing!
Any sugestions or checks to carry out would be much welcomed! :icon4:
:icon4:
I'm a regular user of the tiling forum but have popped over here to see if someone can help me work out what the problem is with my hot water flow issue? I have already had a plumber in but he is struggling to work out the problem.
I live in a first floor flat and believe i have a mains pressure, vented hot water system with 2 x electric immersion heaters. I'm by no means an expert but i believe the system consists of a water cylinder with internal coil, a separate header tank, an expansion vessel and a thermostatic mixing valve.
The issue i have is that the hot water flow has dropped off dramatically in the last couple of weeks, making it un-useable for running a bath or having a shower. Another issue that may be related is the header tank in the cylinder is continually overflowing and running through the overflow pipe. I haven't experienced this in the last 7 yrs.
About 2 months ago i had a whirlpool bath fitted with a concealed dornbrachet mixer unit and thermostatic control for bath and shower. No problems were experienced when initially installed.
The pressure in the expansion vessel was checked on Friday and was zero psi. I have pumped up to 1 bar and so far the pressure has remained stable, although it hasn't fixed the problem.
I was advised that maybe the thermostatic mixer valve for the shower/bath could be letting mains pressure pass into the hot water circuit due to the in balance with hot and cold? Is this possible and would this cause the water level in the cylinder to rise?
I should also add that the tank was removed 3 weeks ago because i though we had a crack in the cylinder, but we couldn't find any problems with the cylinder (blanked off and filled outside with cold water for 24 hours). We now think that the leak was actually coming from the overflow pipe in the header section of the cylinder which has now been fixed.
Lastly i recall checking the header part of the cylinder a couple of years ago and noticed it was bone dry! I wasn't sure why but as everything was working i didn't worry about it. (a guy at work is ex plumber and couldn't understand why i had a header tank in the cylinder for this type of system) Now the water is brimming out the top and continually overflowing!
Any sugestions or checks to carry out would be much welcomed! :icon4:
:icon4: