Leaking Overflow pipe

[dobber1]

My header tank overflow pipe has started to leak when the heating goes off. Is it the ball valve or could it be trapped air ? or are there any other reasons for this Any free advice welcomed…

 

[hiretools]

when you say started to leak where does it leak from ???? Also check the level in the header or f&e when leak occurs and see if it exceeds the level of the overflow pipe....

 

[AWheating]

check the water level in your tank, you made need to adjust the float valve, if its dripping/not shutting off then you may need to repair/replace the valve.

 

[REDSAW]

could be the pump also.

i may be free but i am not cheap!.

 

[WaterTight]

when the heating goes off though? would that be because it's then at it's hottest, has expanded most, pumped over most or whathaveyou? cos if it's a while after heating has gone off - i.e. cold you'd think it was ball-valve but that would generally leak all the time?

 

[AWheating]

it could be a number of things. Best to check the basics like float valve/water level first. If it tends to overflow when at max temp it could easily be the float needs adjusting to lower level in tank to give the tank more expansion volume. some times you find its a combination of factors.