Ensuite plumbing advice

[WillkommenBienvenue]

I would like to install a shower room in my Mum's upstairs bedroom. We don't need a loo in there, just a shower and basin. It's the only bathroom on the first floor and at the opposite end of the house to the toilet. Does anyone know whether this needs to be connected to the waste using a stack for ventilation? It's a cess pit system and it would join a 50mm pipe in the utility room which goes to a junction which then goes into the pit.

Or would I just be able to add it to the utility room pipe (washing machine only). It would probably have a power shower fitted so it would need to drain well.

Also, would it be able to go about 3m along one wall then another 4m along the outside of the house to the vertical drop?

Which country are you in?

I doubt there are any cess pits still in use in the UK.

There are septic tanks though.

which way do the joists run, in the landing and the upstairs rooms?

of course. Septic tank!

The shower would have to be raised and pipes run along the inside of the wall to the end, then outside, turning the corner to run under the bargeboard. The building is listed so can't touch the beams really.

I was thinking you could lift the floorboards and poke the waste pipe between the joists, if they run in the direction you need.

try this

Thanks, the main beam is 500 years old so don't want to mess with that. Ceiling's too low on the ground floor (there isn't one).