Plumbing Under Slab Floor

During the plumbing slab construction the pipes are buried in gravel or sand beneath the slab and are obviously difficult to access.

Plumbing under slab floor.

And that s the method of venting we re using to plumb this bathroom. Plumbing is one of the rough in elements of construction and is generally hidden by the finished elements such as walls floors and roofs. Have your plumber ready to come right away after the fill is spread and compacted under the slab. It can also run under sidewalks stoops patios and decks.

This page covers checking the sewer and water pipes in a slab. Don t ignore this because water leakage under a concrete foundation can cause additional problems. That s when each plumbing fixture has its own vent which is called an individual vent. Below are a some under slab plumbing diagrams that are relatively common.

Let s start with sizing individual plumbing vents. Main sewer line the main sewer line runs beneath the future slab on a gravity flow system. These plumbing sewer pipes should be checked anytime there had been significant foundation movement or foundation repair. Today im going to share with you how i replace old cast iron drain pipes under a concrete slab in a 1958 home.

In the ipc toilet vents are 1 5 in the upc it s 2 inches. See our pages checking over the concrete slab drain pipes and plumbing in the walls for other items to review and check. The minimum toilet vent size depends on your plumbing code. Because the plumber has no access for installing pipes below the concrete preliminary plumbing takes place before the foundation contractor pours the slab.