This started a couple of weeks ago but I've been away and this morning was the first chance I've had to investigate.
One of the 2 overflow pipes has been dripping onto the patio of a morning, starting soon after the heating/hotwater comes on and stopping soon after the timer ends.
It's coming from the smaller of the two tanks in the loft... I've lifted the lid to have a look inside in this picture...
and inside looks like this...
I was expecting the problem to be the float valve, as I had to replace the float valve in the bigger tank last summer when it started constantly dripping, leading to a constant overflow drip.
This time, it's the small tank (heating/hot water expansion tank?) and it's not the float valve - that turns off completely - but rather the pipe coming into the tank from above is pumping hot water into the tank when the heating/hot water system is on. The water in the tank was quite warm and causing condensation on the outside of the cold water tank next to it.
I have a memory of looking inside this tank when I replaced the other float valve and the water level was nowhere near the top/overflow then (last summer).
We've lived here for over 3y and it has only started this behaviour in the last couple of weeks.
Before I call a plumber out... any idea what's causing it?
Thanks for any advice
One of the 2 overflow pipes has been dripping onto the patio of a morning, starting soon after the heating/hotwater comes on and stopping soon after the timer ends.
It's coming from the smaller of the two tanks in the loft... I've lifted the lid to have a look inside in this picture...
and inside looks like this...
I was expecting the problem to be the float valve, as I had to replace the float valve in the bigger tank last summer when it started constantly dripping, leading to a constant overflow drip.
This time, it's the small tank (heating/hot water expansion tank?) and it's not the float valve - that turns off completely - but rather the pipe coming into the tank from above is pumping hot water into the tank when the heating/hot water system is on. The water in the tank was quite warm and causing condensation on the outside of the cold water tank next to it.
I have a memory of looking inside this tank when I replaced the other float valve and the water level was nowhere near the top/overflow then (last summer).
We've lived here for over 3y and it has only started this behaviour in the last couple of weeks.
Before I call a plumber out... any idea what's causing it?
Thanks for any advice