Cracked clay drain pipe repair

RebelButtMunch · 29-06-2021 02:51PM #1

Hi

Ive an old footpath at the side of my house. The downstairs bathroom sink, and washing machine empties via a pvc pipe into a drain/shore. When I look down that shore, it looks like the clay is cracked, and dropped and a lot of the waste water is going into the gap, rather than down the pipe.

Can I use expanding foam to plug the gaps in that? Or something else?
I think I'll also try and make the pvc pipe longer so it bypasses the gap.

I've had a camera down there and the rest of the pipe is fine

Thanks!

kadman · 29-06-2021 03:55PM

Expanding foam is completely useless in this type of situation.

if you can insert a piece of pipe to by pass the problem, then thats fine.

But you must make sure your inserted piece causes no obstruction, or ridges where you connect them.

Otherwise it will make matters worse.

If its clay, can you repair the crack with cement or something similar.

can you get easy access.

RebelButtMunch · 29-06-2021 04:46PM

kadman wrote: »

Expanding foam is completely useless in this type of situation.

if you can insert a piece of pipe to by pass the problem, then thats fine.

But you must make sure your inserted piece causes no obstruction, or ridges where you connect them.

Otherwise it will make matters worse.

If its clay, can you repair the crack with cement or something similar.

can you get easy access.

Yeah, it's broken just under the path where the drain cover is. I reckon I'd get in there with some cement on a spatula

RebelButtMunch · 29-06-2021 04:51PM

Pic

kadman · 29-06-2021 06:54PM

Give it a good cleanup, dry it, and apply your cement.

Maybe you could use some fast setting material like liquid metal from a motor factor,

or maybe fire cement could be used. Good thing is you can get access to it.

whizbang · 01-07-2021 12:51AM

I think there's way too much movement in the existing material to use fire cement, or any cement for that..

I used leftover tile adhesive for a similar job, its still perfect years later.

K.Flyer · 02-07-2021 11:28AM

JetCem is the answer for that. I've used it in a far worse situation before and it's lasted fine.
Thoroughly clean the area, remove any old sealants and make up some JetCem and fill the gaps with it, but smooth it off as quick as possible.
Make up a small (a mug full) first as it goes hard quite quickly, so just make small amounts at a time so as not to waste it.
Make sure not to run water over it for as long as possible, but I'd give it a minimum of an hour. It will be hard within a few minutes, but the longer it's left the better.

RebelButtMunch · 05-07-2021 04:41PM

Update: Thanks folks. JetCem worked great. I made up small batches and kept adding more after it set.

Cracked clay drain pipe repair

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