probably a silly question...

[Post and beam]

I need to make a penetration out through the Utility wall for the sink and washing machine waste water. Is there any regulation on the height above floor level it needs to be please?

 

 

[Marvin]

NEVER a silly question, unless you don't ask it...

 

 

Yes and no. Above external DPC or below. Never through DPC (assuming masonry external wall)

 

As long as there is a fall of at least 1 in 40 on any horizontal pipework inside and outside towards what it drains into.

 

My recommendations: Make all bends after first one from sink swept bends (first one swept or elbow) and where the pipe comes out of the wall the first swept bend silicone on so it can be removed if required in the future.

 

Good luck.

 

M

Edited February 10 by Marvin
further thought

[Post and beam]

Thanks Marvin, much appreciated.

[Nick Laslett]

16 minutes ago, Marvin said:

NEVER a silly question, unless you don't ask it...

I thought I’d just underline that point. 🙂

 

Questions might get ignored, but you will regret not asking. The whole premise of the forum is a place where people can discuss the topic of house building. Remember there are 1000’s of members here, all on their own unique journeys. Just try and pay back the community when you have areas where you feel well informed. 
 

10am is usually teabreak time for me. I often think it is the best time to post.