Toilet waste into rainwater run off shore??

DonnieCorko

Hi all,

I am looking at a house where the bathroom is at the very back of the house, and the bedrooms are at the front on the ground floor.

I am wondering if its possible to build an en-suite in the front bedroom, and drain the wastewater into the shore that the rain goes into via the rainwater pipe. I understand that you cant feed the waste directly into that run-off pipe but can you dig into the underground pipe and feed the toilet waste into that? Is that an expensive task?

Thanks

DonnieCorko

Bump

microgirl

Not a plumber but JFC no! Rain water is "grey water" and toilet waste is "black water". Sewage. They are two entirely different systems.

Do not, for the love of all that's holy, disgorge your pee and poop into the fecking rainwater system!

It's also probably highly illegal. And another reason why folk shouldn't DIY this kind of thing.

1874

Dear God, No!!! How this can even be asked!!?

Furze99

Absolutely not!

mickdw

Put the ensuite on outside wall and simply run the toilet ppipe around and connect to system at the rear.

Furze99

https://www.boards.ie/discussion/comment/122302197#Comment_122302197

Would you have the gradient? I've seen a system where the toilet has a macerator or something like that and a pump which discharges via a smaller diameter pipe to a soil stack pipe.

mickdw

Ah you should. You can actually run the toilet pipe straight out through wall from back of toilet into soil and vent pipe externally and keep the pipe run as high as possible then to allow falls to rear.

SuperBowserWorld

We don't have separate pipes in Ireland for sewage and rain water. It all goes into the sewage system to water treatment plant. Right ?

mickdw

Some old developments on public sewers may have everything going into one pipe but certainly they should be seperate and when going to private septic tank, have to be kept apart.

blackbox

It depends.

If the rainwater is directed to the sewerage system, then you should be ok. This may the case with older builds.

If they are separate systems you definitely should not direct toilets or washbasin waste to the rainwater system.

SuperBowserWorld

I'm still a bit confused. There is only one public pipe system in Ireland for sewage and rain water. I definitely don't think councils separate them and maintain separate networks.

We do have a rain collection barrel on one downpipe though. Probably should add more. Will do when the drought kicks in. 🐫

Sleeper12

https://www.boards.ie/discussion/comment/122302336#Comment_122302336

Under building regulations and local bylaws each dwelling must have separate rainwater & sewage pipes.

All councils do indeed have two separate systems. Rainwater can go directly to the sea. Sewage obviously has to be treated at a treatment plant.

standardg60

https://www.boards.ie/discussion/comment/122302600#Comment_122302600

There are separate storm drains and sewers in developments from at least the seventies.

DonnieCorko

I checked and there isn't separate rainwater/foul drains in this location, so it does indeed flow into the same drains. However, the guy from DCC drainage department said that you can't do it to the rain water drain at the front of the property, it must be to the read, presumably for aesthetic reasons.

standardg60

https://www.boards.ie/discussion/comment/122302156#Comment_122302156

Just to clarify, grey water is what comes from sinks, washing machines, showers etc. and goes to the sewer with toilet waste.

Rainwater is generally referred to as just that, surface water or storm water.

SuperBowserWorld

https://www.boards.ie/discussion/comment/122302664#Comment_122302664

https://www.boards.ie/discussion/comment/122302667#Comment_122302667

Ok thanks. Good to know.

standardg60

https://www.boards.ie/discussion/comment/122302703#Comment_122302703

If they're all the one then I wouldn't see an issue once the connection is done underground, no need for a vent pipe on the ground floor.