Water in ground floor pipework.?

[mikehammer69]

Hi guys

I drained down my open-vented heating system over a year ago and removed some rads, the system is not being used.

I have the feed pipe from the feed and expansion tank fully closed .I checked a few times at one of the rad valves downstairs where the radiator has been removed and there's about 10 litres of water draining out each time ,this is about 6 months after checking previously.

The oil boiler is slightly above the level of the ground floor pipework and I have drained it at the drain outlet on boiler.

Where would this water be getting into the heating system?

Thanks for any advice

 

[terryplumb]

Do you have a hot water cylinder with a coil inside ? Could be perforated. And make sure no water ,not a drop ,is getting into the f&e tank.

 

[mikehammer69]

Hi thanks for your reply

I had thought about the coil leaking into the system

There's nowhere else it can get in apart from the tank and the coil is there?

 

[terryplumb]

Not really. Can you post pics of pipework around cylinder ? You may have isolation valves that can isolate feed and return to coil .

 

[mikehammer69]

Thanks

There's a valve on the bottom end of the coil which I have now turned off

 

[terryplumb]

Thanks

There's a valve on the bottom end of the coil which I have now turned off

Not gonna help much ,you need to isolate flow and return.