How to connect rainwater downpipe into toilet soil pipe?

[harrypotter]

The house in question is quite old and has a combined drainage system.

There's a soil pipe from the toilet that runs beneath a roof eave where there's a raingutter downpipe. What fittings do I need to connect the rainwater downpipe to the toilet soil pipe?

Would something like a rear inlet bottle gulley be OK?

Though I'm not sure because I don't think the trap would be big enough to let the 'solids' through and might be prone to blockage.

Thanks.

 

[harrypotter]

Edit, I assume the solution is this, correct?

So all the sh*t going along the soil pipe doesn't have to go through the bottle gulley.

 

[^woody^]

A skill stack needs a rest bend at the bottom.

 

[harrypotter]

A skill stack needs a rest bend at the bottom.

Could you explain sorry

 

[^woody^]

Sorry I confused myself and you.

Yes that arrangement would be normal - either a bottle or a p trap.

There should be ventilated stack at the end of the run where the toilet is, else there is a risk that flushed water running past the new gully will pull the water trap out and let sewer smells out.

 

[harrypotter]

Sorry I confused myself and you.

Yes that arrangement would be normal - either a bottle or a p trap.

There should be ventilated stack at the end of the run where the toilet is, else there is a risk that flushed water running past the new gully will pull the water trap out and let sewer smells out.

lol no worries. So just to confirm the second picture is correct and the the first pic (bottle gulley inline with the soil pipe) is a stupid idea?

Yes, ventilated stack already in place