Best solution for internal roof drainage into soil pipe

[Ambienz]

I am sure this can be done a lot better.

We have an extension and the drain from the extension roof comes into the house, then meets the 45 degree pipe seen in the photo, forms the large trap made up of several 82mm pieces and then exits to the main soil pipe to the right.

It was done so that there would be no smell coming out of the pipe and I guess this was the only configuration of piping that could be made to meet both ends and form a trap..

However obviously it means that a lot of water is constantly sitting in the trap and over time (being made of multiple pieces) it started leaking in a couple of places.


My questions are:

1. What is the better way of doing this? How can I best achieve the aim of draining the roof extension water with lowest risk of it leaking in the future?

2. If I just run the 82mm (gutter) pipe directly into the soil pipe and eliminate the trap, how much of the soil pipe will I smell?
From the 45 degree pipe in the picture, which ends where the white sheet is, the pipe goes up and then exits the property about 1 metre away.

3. What else should I be thinking about?


Thanks for your help.

D

 

[foxhole]

External pics?

 

[Ambienz]

The gutter drains into the corner of roof extension, under the soil pipe visible in the photo.

Internally it then runs behind a WC frame in upstairs bathroom and then down to meet the pipe in photo of original post.

 

[Ambienz]

Anyone got a better idea would love to hear it?

Thanks

 

[Hugh Jaleak]

Looks like solvent weld soil. done properly it should never leak, but that's another issue. Given it's internal and I presume hidden under normal circumstances, I'd replace that lot with a 110mm Trap, a Rodding access just above and connect up as requires. Then hopefully that will help tidy up and reduce the amount of pipework required.

 

[Ambienz]

Looks like solvent weld soil. done properly it should never leak, but that's another issue. Given it's internal and I presume hidden under normal circumstances, I'd replace that lot with a 110mm Trap, a Rodding access just above and connect up as requires. Then hopefully that will help tidy up and reduce the amount of pipework required.

Thank you for your reply.

Some more information upon further investigation.

There is an access pipe in the bathroom above that connects the gutter drain from above and the shower waste on the side. The leak is coming from the bottom joint between the access pipe and regular pipe that leads to the mess of piping below. I don't know if this is a cemented joint, but expect it should be as otherwise isn't there a risk of water escaping if the gasket gave way (as the larger diameter pipe is above rather than below)?

What is really confusing me is that this join is still leaking water this morning. There is no rain or water in the gutters and the shower has not been used for a week. I even turned the mains water off last night in case there was some other leak that was draining into the pipes from somewhere. This join is also about 1m above the trap section section so even if it leaks, there should not be water sitting in the pipe to leak from.




Is your suggestion to install one of these at the bottom and an 82mm to 110mm adapter above? A much more elegant solution. They all seem to be push fit rather than solvent. All the pipework is hidden behind a false wall with cupboards in front. In trying to fix I am concerned about creating a bullet proof solution as any leaks can go undetected for years and cause serious damage. These seem to be referred to as underground, and assuming there is a leak, it would leak into the surrounding soil, whereas I don't have this luxury.

Or are you referring to a different product?

Thanks again for your assistance