Hi
I've got a open/vented system in my 1990's two story house.
There are two tanks in the attic, one large cold water tank, and one smaller c/h expansion tank. Both tanks are fed by 15mm cold mains via a ball valve.
The overflow pipe from the smaller tank drips (slowly, but regularly - enough to soak the doormat beneath it).
Anyway, I assumed that the ballcock/valve from was getting old and needed replacing. I just went up to have a look and was disappointed to find that whilst the valve is old and rusty, its not dripping, or 'spraying'. It seems to operated on/off just fine.
What I did notice though, I that the water in the C/H tank was hot - and I havn't yet turned on the C/H this year (saving pennies as long as we can!). I can only conclude that hot water is coming on via the hot water cylinder overflow (cylinder in airing cupboard on the 1st floor). However the water in the tank was a good two inches below the height of the overflow pipe that it is dripping from. Im a bit perplexed by that.
None the less, if the hot water cyl is overheating, and overflowing into the C/H Expansion tank, and then dripping from the overflow into the garden, what's my next step to identify the cause?
Do I look at the thermostat on the Cylinder?
Cheers in advance if anyone can help
Tom
I've got a open/vented system in my 1990's two story house.
There are two tanks in the attic, one large cold water tank, and one smaller c/h expansion tank. Both tanks are fed by 15mm cold mains via a ball valve.
The overflow pipe from the smaller tank drips (slowly, but regularly - enough to soak the doormat beneath it).
Anyway, I assumed that the ballcock/valve from was getting old and needed replacing. I just went up to have a look and was disappointed to find that whilst the valve is old and rusty, its not dripping, or 'spraying'. It seems to operated on/off just fine.
What I did notice though, I that the water in the C/H tank was hot - and I havn't yet turned on the C/H this year (saving pennies as long as we can!). I can only conclude that hot water is coming on via the hot water cylinder overflow (cylinder in airing cupboard on the 1st floor). However the water in the tank was a good two inches below the height of the overflow pipe that it is dripping from. Im a bit perplexed by that.
None the less, if the hot water cyl is overheating, and overflowing into the C/H Expansion tank, and then dripping from the overflow into the garden, what's my next step to identify the cause?
Do I look at the thermostat on the Cylinder?
Cheers in advance if anyone can help
Tom