Broken clay gully/trap - What to replace it with?

[IgamOgam]

Son-In-Law is renovating the patio area at the back of his house and restoring the surface to be at the correct level (2 bricks down from DPC I believe) by removing all the additional layers that have been added over time. He may (or may not) have damaged this clay gully/trap that would have been installed when the estate was built sometime in the 1960s. The gully/trap appears to have a vertical outlet into a 90 degree bend connected into the soil/waste system.

Ignore the plastic pipe, it's a temporary bodge to take waste water from the kitchen sink and washing machine into a nearby inspection hatch/chamber.

Can anyone shed any light on the make/model of the gully/trap and how we might best replace it, and what with. The vertical outlet from the gully/trap is cemented into the collar of 90 degree bend, so is probably going to be tricky to remove without causing further damage, so and advice on how to do so would also be greatly appreciated. I've attached a sketch of the rough dimensions of the gully/trap

 

[blup]

Time for a new gully, a roddable bottle trap type seems the best option. Laying a new patio is the ideal opportunity to get the levels right. Clay to plastic connectors are available

 

[IgamOgam]

Time for a new gully, a roddable bottle trap type seems the best option. Laying a new patio is the ideal opportunity to get the levels right. Clay to plastic connectors are available

Yes. I'm also thinking a bottle gully with a square/rectangular grille and a 90 degree bend into the collar of the clay pipe. Just a question of whether I can make the dimensions work, whether I can separate the existing components without breaking anything else, and whether there is a 90 degree fitting that is suitable to fit into the collar of the clay pipe. More googling to do and a visit to some local builders merchants here in Newport tomorrow.

 

[noseall]

Yes. I'm also thinking a bottle gully with a square/rectangular grille and a 90 degree bend into the collar of the clay pipe. Just a question of whether I can make the dimensions work, whether I can separate the existing components without breaking anything else, and whether there is a 90 degree fitting that is suitable to fit into the collar of the clay pipe. More googling to do and a visit to some local builders merchants here in Newport tomorrow.

Piece of cake...

 

[IgamOgam]

We seem to be making progress. After trying several other combinations of fittings, it looks like we can get everything to line up. I've had to cut away part of the clay pipe collar in order to fit the 90 degree drain adaptor. A straight drain adaptor with a 90 degree bend would push the bottle gully way too high for the intended finished surface level.

Plan tomorrow is to make a concrete pad for the bottle gully and then cut a short piece of 110mm pipe to connect the 90 degree McAlpine Drain Connector to the 90 degree bend from the bottle gully.

Any recommendations for suitable material for filling the collar of the clay pipe? Cement, Silicone, Soudal, Nothing, Something Else?

 

[noseall]

We seem to be making progress. After trying several other combinations of fittings, it looks like we can get everything to line up. I've had to cut away part of the clay pipe collar in order to fit the 90 degree drain adaptor. A straight drain adaptor with a 90 degree bend would push the bottle gully way too high for the intended finished surface level.

Plan tomorrow is to make a concrete pad for the bottle gully and then cut a short piece of 110mm pipe to connect the 90 degree McAlpine Drain Connector to the 90 degree bend from the bottle gully.

Any recommendations for suitable material for filling the collar of the clay pipe? Cement, Silicone, Soudal, Nothing, Something Else?

Sharp sand and cement 3:1

Be careful as it will be a brittle connection, unlike the more flexible Fernco coupler shown above. Make sure you have it all connected up and rigid before mortaring.

 

[ree]

OP,
I dont know how far along with your job you are but best practice would have been to dig out down to the horizontal drain - cut it & then. replace with plastic back to the bottle gulley.
FWIW: how far away is the manhole - have you opened it?
Ground level should be 150mm below the DPC -if needed, you will now have an opportunity to set the new guly as a 150mm below DPC benchmark?

 

[Ivor Windybottom]

90 degree elbows are blockages waiting to happen. You now have three of them! That is definitely not roddable, it's a right botch job.

You need to dig out then cut into a horizontal length of pipe. Point your gully at it and use whatever 15, 30 and 45 degree couplers you need.

You need to use a rubber adaptor with clamp around the clay pipe - definitely not sealant of any brand.

Do it right.

 

[IgamOgam]

The nearby inspection hatch/chamber I referred to previously is only a foot or so off to the left on my second photo. It's quite shallow and takes the soil from the bathroom via external cast iron pipework at the rear corner of the house.

The clay pipe taking the waste from the kitchen/washing machine disappears off underground in the direction of the neighbours garden, which appears to have been completely concreted over at some point in the past.

I suspect that both bathroom and kitchen pipe runs meet up somewhere nearby, but there is no sign of an inspection chamber for where these pipe runs might meet up (unless under the concrete in the neighbours garden!).

It's far from an ideal situation, but with several other bodges by the previous owner to deal with, I really, really don't want to touch any clay pipework that I don't have to. The previous clay gully didn't appear to be roddable either, so I'm not sure we are any worse off than before.

We are setting the top of the gully 5mm below intended finished surface level, which will be 150mm below DPC, and 10mm off from wall so we can get a bead of sloping cement all around.

We'll take photos as we go along so if we have to revisit it in future we know what to expect.

Not great I know, but it is what it is.

Hmmm. Looking at it again, and bearing in mind the above comments about 90 degree bends, it looks like I might be able to swap the first 90 degree bend for a 45 degree bend and rotate the bottle gully accordingly. I'll go back to the builders merchants Monday.