Water seaping from waste stack

[kirky1176]

Hi All,

I'm looking for a little advice. I've noticed that where my outside waste stack meets the ground, a small amount of water is seeping out. As the stack reaches ground level, there appears to be some sort of joint. To the eye it looks fine but clearly something isn't right as water appears every day now.

Can anybody advise on how to investigate the problem further. Is it likely to be a leaking joint, or a blockage which is causing the problem.

Any thoughts/suggestions appreciated!

 

[seco services]

And the stack is plastic/cast ?

Give us a pic.

 

[kirky1176]

Its a bit of both. The house was extended before we moved in so looks like the lower part is the original cast iron and the upper part is plastic.

Just taken a selection of photos, see below.

//www.diynot.com/network/kirky1176/albums/

Thanks!

 

[Hugh Jaleak]

Looks like someone has grafted in a joint in plastic to add another W.C., top section above the porch roof is still cast iron. I'd ensure this is adequately supported, there is a lot of weight there!

As to leak, the collar on the clay pipe at the foot of the stack is cracked, chances there the clay is knackered. Long term solution is to excavate and expose the clay pipe and replace the damaged sections. Fernco couplings (similar to that used where iron and plastic are joined above ground) will adapt from different materials.

If you've any doubt about the integrity of the top section of cast, i'd remove the remainder and replace with plastic, top and bottom. You can then replace damaged drain in plastic and make one connection to the existing clayware.

A bloackage would usually cause other symptoms, water filling the pan when flushed and slowly subsiding, and I would suspect a lot more water leaking. Check manholes are running clear if in any doubt.