Attic Central Heating Expansion Tank Overflowing

[stevetheplumber]

turn of the cold feed to the cylinder open hot taps try for 24 hours if that stops it the coils split

 

[Rickster123]

It's a 3 year old thread!

 

[tamz]

Probably ripped out and a combi stuck in under some eco scheme so there is a good chance that will be on its last legs too 😉

 

[Unregistered]

Hi - thanks for the replies even a few years on!

I guess I can share the "this is how it ended story".

So basically the coil in the immersion cylinder had a hole in. The pressure difference between outside and inside the coil caused the overflow in the central heating overflow tank in the loft. Managed to get a good price on a new cylinder and fitting from a local plumber. Once that was done the problem was solved!

The next major DIY drama was fence-gate later that year, when all my fencing blew down in the October 2013 storm, but that's another story for another forum!

Thanks for all the advice on this thread!

 

[Reg Man]

Glad we were of some help to you.

 

[Frog67]

Isolate the large tank from the mains and drain it by running hot and cold taps in the bath. Run boiler if little tank stops overflowing then suspect split coil. If it continues overflowing then suspect fault in heating circuit. Bleed a radiator and if the water is brown/black then you probably have a corroded system causing restricted flow around the system and making the water travel up the coldfeed and possibly vent pipe.

 

[PlumbBobBob]

Isolate the large tank from the mains and drain it by running hot and cold taps in the bath. Run boiler if little tank stops overflowing then suspect split coil. If it continues overflowing then suspect fault in heating circuit. Bleed a radiator and if the water is brown/black then you probably have a corroded system causing restricted flow around the system and making the water travel up the coldfeed and possibly vent pipe.

Frog67 read post 24 above

 

[Frog67]

Doh! cheers steveb and thanks for the welcome APPlumbing