ᐅ Drainage Question – Wastewater Pipe into Rainwater Pipe

Hello.
I have a general question. We have a combined sewer system, meaning that rainwater and wastewater are discharged into the main sewer. Wastewater and rainwater are separated up to the inspection chamber and from there combined into the main sewer.

Now we have the following idea. In our utility room, due to the gas heating system, controlled residential ventilation, and fireplace, condensate forms, so currently a wastewater pipe is planned. Unfortunately, all other wastewater pipes are on the opposite side of the house. Directly adjacent to the utility room, only the rainwater pipe from the roof drainage is present in the garden. I hope I have explained this clearly enough, although I don’t yet have any plans available...

Is it permissible, possible, and reasonable to connect the wastewater pipe of the utility room to the rainwater pipe directly adjacent to it in the garden? Otherwise, the wastewater pipe for the condensate would have to be routed completely under the house (without a basement) to the other side of the house.

Maybe someone here has an opinion on this.

I wouldn’t worry about the legality at all and just go ahead ;-)

Is there by any chance a guest toilet next to the utility room? Then you could also direct the "wastewater" into the toilet tank. That works very well too...

nordanney schrieb:
I wouldn’t even worry about the legality, just go ahead and do it ;-)

Is there by any chance a guest toilet next to the utility room? Then you could also route the "wastewater" into the toilet cistern. That works really well...

I want it to be done officially and according to regulations. It also has to be included in the drainage plan for the building permit / planning permission.

As mentioned before, all other wastewater pipes are on the opposite side of the house, including the guest toilet, etc. Personally, I’m not keen on having a wastewater pipe installed all the way under the concrete slab of the house just because of minor condensation water. In the end, all the water ends up in the combined sewer system anyway.

Does anyone else have an opinion on this?

Rainwater is rainwater. Anything else is not rainwater. The only option is to install a wastewater pipe around the house. Beforehand, make sure to check with the local authority regarding drainage. If the person there is reasonable, they will probably smile just because of the inquiry... and allow you to dig.

Are we really only talking about the condensate drainage from the heating system? It goes from our utility room through the wall into the pipe that comes from the gutter.

Nordlys schrieb:
Are we really only talking about the condensate drainage from the heating system? It goes out of our utility room through the wall into the pipe coming from the gutter.

Yes, only condensate from the heating system/fireplace and the mechanical ventilation system.