pinhole in HW cylinder coil?

[steved101]

ok just need a bit of help/putting right/assuring on this one, if possible for my research:

to check/test if a hw cylinder coil has a pinhole in it, you can do this by:

turning off the cold feed gate valve (service valve) to the cylinder. the flow out of the f & e overflow should immediately stop? is this correct? are there any other ways/things you should check?

if no gate valve fitted for some reason (bunging the cold feed hole inside the cold water tank should also do the same job).

thanks again, Steve.

 

[seco services]

yes both correct

 

[steved101]

thanks seco. sorry i double clicked and posted the same question twice. apologies for that.

 

[seco services]

you can always check your float valve in the cws tank as well that will be filling