Repair drain - how please?

[Mutley56]

Dear all,
I need to repair this, which drains the water from the kitchen sink and dishwasher. The horizontal section of pipe ? clay ? seems to be too short to deliver the water into the drain and there is a void underneath it.

I think I need to remove the horizontal clay section and replace it with, possibly, plastic pipe on a bed of cement or pea shingle and cement around the top edge. Is that correct? If so what size replacement pipe do I need and would I put it on cement bed or pea shingle. There if a metal square grate that sits on top of the drain.

Thanks in advance for your advice.

Mutley56

 

[Nige F]

No need to touch the clay/ cement area - just make the plastic waste pipe longer and take it down into the gulley stopping above the water level - and fit a new plastic gulley grid with a cut out for the pipe

 

[Mutley56]

Thanks Nige F.

That‘s great advice. I was really overthinking things.

thanks again.

 

[Dereekoo]

Just mix a 3 to 1 mortar and trowel into gap/ space and shape to suit

 

[Mutley56]

Thanks Dereekoo.

I have a tub of blue circle ready mixed mortar powder I can use.

mutley56

 

[Mutley56]

just to confirm, What size pipe do I need for the extension? Solvent welded?

thanks. Mutley56

 

[Mr Chibs]

40mm solvent weld at a guess, looking at your photo.

I would also poke a rod into the 'void' to see how big the hole is, as the water leaking down there over the years could have made a large void by washing away the soil/fines.

 

[Mutley56]

Mr Chibs,

it was indeed 40mm pipe, thank you. I did the job this afternoon as needed the kitchen sink up and running again. I will address the back fill with mortar tomorrow if it stops raining.

mutley56

 

[Harry Bloomfield]

No need to touch the clay/ cement area - just make the plastic waste pipe longer and take it down into the gulley stopping above the water level - and fit a new plastic gulley grid with a cut out for the pipe

The water level in the gulley looks a bit high, might it be blocked?

 

[Mutley56]

Hi HB,
I now understand that this is a gulley. Water drains from the sink easily and the level in the gulley doesn’t change, and so I don’t think there’s a blockage.
thanks for comment though.
mutley56

 

[Deleted member 267285]

There’s a crack in that clay/earthenware too, perhaps use some of the cement for that too?

 

[Mutley56]

CBW,
Is that a matter of forcing some mortar into the cracks?
mutley56

 

[Deleted member 267285]

CBW,
Is that a matter of forcing some mortar into the cracks?
mutley56

I wouldn’t force it, just apply some and follow the shape of the pipe.

 

[Mutley56]

Chris,

forgive me, do you mean follow the shape of the cracks or cover the entire surface of the pipe?

 

[Deleted member 267285]

Just cover the cracks following the shape of the pipe, if that makes sense?