Plumbing Under Concrete Basement Floor

A concrete slab foundation is constructed by pouring concrete a mixture of gravel or broken stone sand cement and water within a mold to cure.

Plumbing under concrete basement floor.

For the purpose of clarity let us take the three types of houses discussed in this book the house with basement the house without basement and the house with a poured concrete slab floor and show how the plumbing installation should be done for each one. First locate the main stack the large 3 or 4 in. Plumbing design installation for homes with basements. Rising groundwater causes hydrostatic pressure and that causes soil to push on your basement walls and floor.

From there the pipe runs under the floor and out to the city sewage system under the street. How to run plumbing under concrete. The concrete slab is often placed on a layer of sand for drainage or to act as a cushion. Once the concrete is out you can dig in the remaining trench to remove the sand or soil before running the new plumbing.

At this point you will no longer see the horizontal drainpipes and the main sewer line but you will see the stubs that extend vertically out of the sand. Houses built on a slab lack crawlspaces and there is no space under the floor. So before you can do any real planning you have to find that line. If your basement is in the way and there are structural deficiencies or cracks in the concrete then your basement becomes the path of least resistance and the groundwater goes there.

Plumbing is one of the rough in elements of construction and is generally hidden by the finished elements such as walls floors and roofs. Diameter vertical pipe that runs into the basement floor. It can also run under. But it may run at an angle rather than straight out to the street.

Considerations cutting through a concrete floor should be a last resort.