Split hot water cylinder coil

[Meady]

A friend of mines f+e tank is constantly dripping even when the boiler is off so the pump isn't running.

Before contacting me he has already changed the ball valve, which didn't stop it and isolated the mains to the f+e tank but it was still constantly dripping.

I have told him to isolate the mains to the cold water storage tank and run the cold tap to drain it, he has done this and the dripping has stopped. Am I right in saying the coil in the cylinder has had it and he needs a new cylinder.

Cheers

 

[Aquarius]

Would it not be the cold water storage tank vent that would be dripping if this is the case? Which part is dripping? The vent pipe, the float valve, the overflow?

 

[Meady]

The overflow out of the facia sorry.

 

[Aquarius]

It could be a cheap tap, with unbalanced supplies?

 

[Jim Goodenough]

Before contacting me he has already changed the ball valve, which didn't stop it and isolated the mains to the f+e tank but it was still constantly dripping.

I have told him to isolate the mains to the cold water storage tank and run the cold tap to drain it, he has done this and the dripping has stopped. Am I right in saying the coil in the cylinder has had it and he needs a new cylinder.

Is the f&e tank lower than the cold water storage tank?

 

[Meady]

Both tanks are on the same base, so the bottom is the same level.

 

[Jim Goodenough]

Both tanks are on the same base, so the bottom is the same level.

Ok, therefore water level in cold water storage when full and generally is higher than f&e which is normally static, so likely to be spilt coil if as you mention supply has been valved off/ballvalve replaced and not letting by.

 

[mfgs]

As above, sounds like a split coil to me.

 

[Meady]

Thought that was the case, just wanted to double check.

Cheers for the help.

 

[king of pipes]

Quite possible the hotwater would usually be discoloured ? if this is the case due to contamination of the heating water leeching into the domestic supply . Kop