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Mend Ballcock Tank Loft Overflow

CENTRAL HEATING TANK IN LOFT OVERFILLING WHY?

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

STEWART
May 2008
BallcockHeating, Home Heating SystemsTank Loft Overflow
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

iain
May 2008

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Ballcock Overflowing: Central Heating Tank Help