Expansion tank overflowing.

[pete66]

Hi, some advice please.
The expansion in the loft is constantly overflowing, I've replaced the ballcock and valve but still no good.
I bail out the water back down to a few inches from the bottom, 24 hours later the tank is full and overflowing again.

any advise would be much appreciated.
thanks, Pete.

 

[ShaunCorbs]

any recent works eg new shower taps etc?

 

[Unregistered]

Hi Shaun, we have recently had fitted a new bath, but this problem has been going on for over a year and is gradually getting worse.

pete.

 

[ShaunCorbs]

Hi Shaun, we have recently had fitted a new bath, but this problem has been going on for over a year and is gradually getting worse.

pete.

is it on the big tank (for your hot water) or is it on the little tank (for heating)

 

[plumben]

Why did you remove nearly all the water from the tank, dose the ball valve shut off

 

[pete66]

Small tank in the loft, pretty sure it's the expansion tank.
Pete.

 

[ShaunCorbs]

Small tank in the loft, pretty sure it's the expansion tank.
Pete.

heating and anything changed new pump etc?

 

[pete66]

Yes, the valve shuts off, just wanted to see how fast it refilled.
Pete.

 

[Sparkgap]

Pinhole in HW cylinder coil?

 

[jtsplumbing]

Could have a problem with your hot water cylinder is the top of the expansion tank lower than the water level in the big tank ?

 

[lucas121]

Pinhole in HW cylinder coil?

I'd hedge my bets on this.

 

[spanner]

Is the heating working as normal. Meaning which ever way you want to turn on or off it works as normal...?
And as for the water tank" overflowing " . This is constantly occurring??