water coming from attic over-flow pipe

Cookiepus

Hello
we noticed water coming from attic over-flow pipe.
the pipe comes out through the roof and the water falls down into the backyard.
come out in big spurts for about a minute then stops.
Now or heatings not working
boiler comes on but radiators do not heat
What the hell is going on!
any advice appreciated
Cookie

biko

This happens when there is a problem with the stopcock for the inflow in the attic expansion tank.
Get up there and have a look. Maybe stopcock got snagged or came lose or something.

Cookiepus

Thanks Biko
i just went up there and had a look
i think i found the stopcock
i tried turning it but its tight
i didn't ty to force it because ive no idea what im doing!

Cookie

biko

Sorry my bad, it's not the stopcock I meant.
Open a toilet tank in your bathroom, the attic expansion tank works the same.
When water is low the floater ball will drop and let more water into the tank thorugh some intake hose.

The problem arise when the floater and arm isn't working properly, then the water won't stop coming into the tank and will then be routed by the overflow pipe outside so the tank doesn't overflow, ruining the attic floor.

What you need to do is to figure out why the floatball and arm doesn't stop water from coming in when the tank is full.

What I did was to duct tape 2 empty large coke bottles to the floatball, increasing the buoyancy.

Any plumber should be able to fix your issue in 15 mins but they're usually just below a hundred for call-out.

Cerco

I would look for a stuck zone valve.

esox28

Have you two tanks in the attic?

Does the water over flow all the time or just when heating is on?

Phoebas

Problem with the ballcock

Zane97

You might have a split in the hot water cylinder coil. If you have a 2nd small tank located in the attic which is higher than the bigger domestic water tank , then this might be the case. No rads heating isn't a good sign.

Is the water dis-coloured from the bathroom basin?

Dannymor

If the curculation pump and the boiler stat are faulty then the water will boil up to the header tank in the attic and over flow to the yard, also the rads wont heat up, you need to check the ballcock in the small tank in the attic

QBE

is the cylinder heating hot water. if so its pitching and a restriction (maybe airlock) on the rads circuit.

if both are not heating . f and e tank is is expanding in the tank. thats why it splurts out the overflow.