Plumbing Under The Floor

Using the dimensions on the floor plan measure from the outside of the foundation walls or slab.

Plumbing under the 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. The two major plumbing codes in the united states is the ipc international plumbing code and the upc. Signs of under sink plumbing trouble. So before you can do any real planning you have to find that line.

Here s how to connect the plumbing under your bathroom sink. 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. The photo below shows a sink drain hot water line and cold water line at a stud wall on the outer edge of the floor slab. Take your floor plan and measuring tape and check the location of every pipe.

How to cut a concrete floor for new plumbing. From there the pipe runs under the floor and out to the city sewage system under the street. But it may run at an angle rather than straight out to the street. Supply leaks under the kitchen sink or bath vanity can go unnoticed for a long time since they re usually at the back of the cabinet.

Diameter vertical pipe that runs into the basement floor. The plumbing trenches are typically dug at the same time as the slab footings if any. 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. The center of the lav s drain is located 18 approximately above the finished floor.

During new construction the builder installs drain lines and stubs that will connect to future plumbing fixtures before he pours the slab on grade.