DIY Doctor

Main navigation

Advice on Sewage System Under Slab Foundation

Postby devmanoj » Wed Apr 24, 2019 1:18 pm


What are the pros and cons of having the sewer pipework under the slab foundation? On our existing renovation work, the builder has changed the previously external sewer to an internal under the slab foundation one that runs along through living room and out to the garden. With tile flooring and underfloor heating, do you reckon it will be a hassle in case of possible future leaks/blockages? All the upstairs and downstairs bathrooms, utility and kitchen sink drainage will be connect to this pipework that runs under the living room slab foundation.
Any advice is much appreciated.

Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Wed Apr 24, 2019 12:27 pm


Simply Build It

Postby B4Less » Mon Apr 29, 2019 3:47 pm


Yes I would advise not to do this. It is always best to avoid any sewer piping to run under concrete flooring or footpaths as much as possible.

The last thing you want is a blocked pipe under your sitting room floor and no way to clear it. An AJ or manhole will not suffice as sometimes you do have to get down to a pipe to unblock it.

Although running the pipe under the floor is the quickest and cheapest way of doing it but its better to take it out of the house and run it around the perimeter.

Rank: Ganger
Progress to next rank:
Posts: 64
Joined: Thu Apr 04, 2019 12:36 pm
Location: 3rd Floor, 207 Regent Street, London, W1B 3HH

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics