External soil pipe leaking at seal

[sundaybighouse]

Hi guys, I was about to start painting my external soil pipe when I noticed it was leaking. It looks like there is a silicone seal which has perished.

My questions are:

What is used to actually seal the joint between the coupling socket (not sure if thats the right term) and bottom part of the soil pipe?

How do I go about replacing the seal?

I have stopped using the upstairs bathroom in the hope that it will stop leaking so I can take out the seal and replace it. Is my thinking flawing here?

Any advice would be appreciated.

Thanks

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[looneyfitter]

That looks like cast pipe to me? Either way, just replace the coupling with a new one.

 

[looneyfitter]

Just had a thought, it the cast has perished badly, the other options are.

1) use a rubber band coupling high level (not sightly)
2) cut the cast out low level and renew it up in plastic.

 

[sundaybighouse]

Thanks looneyfitter,

I believe the coupler is plastic and I thought the soil pipe was clay. There is another coupler and brackets at the bottoms where are iron.

How easy is it to replace the coupling? I should say I am no diy expert to say the least.

Do I cut it out with a recip saw or something?

Thanks

 

[looneyfitter]

More than likey cast mate, Id cut it out from the fit a cast-plastic adapter then re-fit it in plastic. Pretty simple tbh. The easiest option is a band coupling but as said bud they dont look too nice.

 

[Nige F]

You can cut that socket off with a £6 disposable hand saw then use a fernco flexseal fitting as suggested by loonyfitter - not that unsightly in my opinion , if you position it with the screws @ the back

 

[sundaybighouse]

Yes looneyfitter you are right it is cast iron.

Thanks guys. I have a good understanding now.

I'll have a look at the flexseal fitting. If it looks ok, I'll go ahead.

Thanks again.

 

[xr4x4]

So they used a plastic coupling on cast and used tons of silicone, which is now failing.

 

[sundaybighouse]

Hi xr4x4, I think you referring to the original job.

Since I've moved in I have discovered loads of plumbing problems. It seems the problems all relate to a botched loft conversion. They had the soil pipe running level from the toilet, in fact it was practically going upwards. The pipes for the radiators and water supply are all over the place.

I dread when I'll find the next one!

Do you agree with looneyfitter and Nige F regarding the repair?

 

[xr4x4]

Hi xr4x4, I think you referring to the original job.

Since I've moved in I have discovered loads of plumbing problems. It seems the problems all relate to a botched loft conversion. They had the soil pipe running level from the toilet, in fact it was practically going upwards. The pipes for the radiators and water supply are all over the place.

I dread when I'll find the next one!

Do you agree with looneyfitter and Nige F regarding the repair?

Yup, sounds like a plan.

Silicone wasn't the way to do it!

 

[sundaybighouse]

Indeed not.

Thanks.

 

[looneyfitter]

Just thought on, you could also use a propper 4" cast coupling. Can't remember who make them but drain Center could order you one. Has two cast half's and a rubber band seal. This bolts over the seal. Would be slot easier for you that way and will look fine painted. See I I can find you a link

 

[looneyfitter]

Here you go mate. You want a ec002 mechanical one will be easier to fit for you. The pushfit is intended for cast but the mechanical ones fit just the same. The fernco one will also do the job and will be a stock item however they don't look the best. Your choice really.
http://www.ascinfo.co.uk/asccontent/12074\productuploads\productothers\acc_section3.pdf

Fernco one
http://www.fernco.com/plumbing/flexible-couplings

 

[sundaybighouse]

Thanks again looneyfitter.

I'm going with the fernco flex, it doesn't look that bad.

Can it be painted?

 

[looneyfitter]

Its rubber mate so as long as the paint is flexible, i can see why not.