Leaking overflow pipe

[marlboro]

You may remember me posting a couple of weeks ago about my central heating pump not working.

This was changed and both heating and hot water now works.

Over the last few days though my overflow pipe has been steadily dripping.

I believe it is from the smaller of the 2 header tanks in the loft.

We had a play around with the ball cock but it still seems to be dripping.

Any ideas what could be causing the leak?

Is the pump speed too high?

Is the temperature on the boiler turned up to high?

Any help would again be greatly received.

Cheers.

 

[marlboro]

Update.

Checked the ball cock again and I think it's leaking at the joint.

Going to replace the ball cock and see if it that solves it.

 

[SafeGasInstall]

put pump on 2