Thanks for your help but I think I have managed to confuse things! When I said that the overflow 'always drips when the hot water is on' I meant when the HW is being heated...not when the actual taps are on...sorry!! Turning on the taps always stops the dripping, until the tank has filled...
Hi...first post to this site (and I'm just a girl!) so please go easy!
The overflow pipe from large header tank in our loft always drips when the hot water is being heated-never when just the CH is on. Turning on the HW taps fixes the drip till the tank fills up, then it starts again! It just...