I FIITED A NEW BALLCOCK IN TANK BUT THE TANK IS STILL FILLING TO OVERFLOW CAN THE TANK BACK FILL FROM THE SYSTEM ANYHOW? I THOUGHT WATER ONLY CAME IN TO TANK FROM SUPPLY
could be the cold feed into the house crossing over in the back of a mixer tap and pussing up through the system and into the water tank, you havent stated which tank.
Baz, June 2008
water can backfill on both tanks.
f/e can backfill from a split coil in cylinder.
cws tank can backfill from the cylinder caused by cold mains entering into hot gravity.
what tank is backfilling need more info.
hi-spec plumbing & heating, May 2008
its a feed and expansion tank so yes it will rise when heating on for example. you may have the float set too high so it overflows when expansion occurs
