Plumbing Under Concrete Basement Floor

The concrete slab is often placed on a layer of sand for drainage or to act as a cushion.

Plumbing under concrete basement floor.

Considerations cutting through a concrete floor should be a last resort. Houses built on a slab lack crawlspaces and there is no space under the floor. Plumbing is one of the rough in elements of construction and is generally hidden by the finished elements such as walls floors and roofs. Plumbing design installation for homes with basements.

But it may run at an angle rather than straight out to the street. 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. Homes with this a concrete slab foundation rest atop this rock solid block. 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.

First locate the main stack the large 3 or 4 in. Rising groundwater causes hydrostatic pressure and that causes soil to push on your basement walls and floor. 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.

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. So before you can do any real planning you have to find that line. From there the pipe runs under the floor and out to the city sewage system under the street. There is no crawlspace or basement beneath which means the plumbing is under the slab foundation.

Diameter vertical pipe that runs into the basement floor.