Laying Water Pipes In Concrete Floor

Posted 7 years ago wwaswas.

Laying water pipes in concrete floor.

Layout for the fresh water supply system. Using the dimensions on the floor plan measure from the outside of the foundation walls or slab. Running drainpipe through joists calls for meticulous work. The plumbing trenches are typically dug at the same time as the slab footings if any.

My house has concrete floors on the ground floor and the rad and central heating pipes run between the wall and plasterboard via 10mm microbore piping. Before the concrete trucks come the contractor fills in the area over the network of plumbing pipes and drain lines with compacted sand. These roughing plans plumbing rough in plans will give you all the dimensions of the fixtures their minimum height from the floor and distance from the wall and the location of the holes in the wall and floor for the supply lines and waste pipes. We kept the softener in its original location under where the sink had been by the rising main and the builder s plumber ran three copper pipes for hot hard cold and soft cold pipes to the new sink location about two metres away.

The holes must follow a straight line across the floor and must ascend or descend so the pipe will be sloped 1 4 inch per foot. We had a kitchen extension built in 1993 with copper pipes buried in the concrete floor. Once the trenches are dug you can add the sewer pipes and stub outs pipes that sit above the slab floor that eventually connect the sink toilet bathtub or shower and any other drains to the system. Repairs after the fact are costly and difficult and require cutting into the slab with a plunge cut concrete saw and a jackhammer to remove sections of the concrete to access the pipes.

If joists are 16 inches on center and pipes run across them at a right angle holes should differ in height by about 3 8 inch.