Attic Tank Overflow

mloc123

Our attic water tank overflows slightly when the heating is on. The overflow pipe takes care of it and it drips out the side of the house.

My theory is, when the heating is on and the water in the cylinder heats and expands it expands up the feed pipe to the attic and raises the level in the attic just enough to overflow... opinions on this? would the heated water expand enough for this to happen?

The solution I guess is to reduce the level the ball cock allows the tank to fill? As it it fills within a few mm of the overflow pipe.

dpofloinn

Do you have a heating expansion tank (small tank)? if so it might be over filled so when the heated water expands it has no where to go except out the overflow.If this is the case check the tank when the system is cold bale out some water and adjust the ball valve accordingly.

mloc123

dpofloinn wrote: »

Do you have a heating expansion tank (small tank)? if so it might be over filled so when the heated water expands it has no where to go except out the overflow.If this is the case check the tank when the system is cold bale out some water and adjust the ball valve accordingly.

This was my first theory, I half emptied the expansion tank and tied the ball cock up to stop it refilling... but the overflow still happens, so I know it is the main water tank.

dpofloinn

Bit of a puzzle there alright I cant say i've ever seen that before you could drain down the cold water tank a little and bend down the the arm of the ball valve a little but be careful they can very easily snap.

corkgsxr

you can get expansion from your hot cylinder too.

ballcock id prob getting old. replace there cheap. and bend the arm down abit on the new one. gives ya abit more life to them

tiny timy

Just bend the ballcock bar a tad and that'll fix it.had the same problem myself and that done the trick.

corkgsxr

tiny timy wrote: »

Just bend the ballcock bar a tad and that'll fix it.had the same problem myself and that done the trick.

old ballcocks can snap easy.

tiny timy

corkgsxr wrote: »

old ballcocks can snap easy.

Nothing worse than your ballcock going snap! :-)

corkgsxr

tiny timy wrote: »

Nothing worse than your ballcock going snap! :-)

and a over flow wont be able for full flow.


can home from work last bad winter. out the back on the phone when suddenly overflow starts pouring. up i went ballcock flying water. (turns out nossle split so couldnt turn off) i ran outside to find the mains valve (none inside ffs) pavement frozen with half inch of ice. couldnt remember where it was, scraping fast as i could with a radiator bracket. found it but what a balls

aujopimur

corkgsxr wrote: »

old ballcocks can snap easy.

And new ones.

mloc123

corkgsxr wrote: »

old ballcocks can snap easy.

That is my fear. I might shut of the feed and half drain the tank before attempting it...

corkgsxr

mloc123 wrote: »

That is my fear. I might shut of the feed and half drain the tank before attempting it...

Just get a new one there about 8 quid