How To Run A Vent Under Concrete Floor

Anchor the drainpipe with straps.

How to run a vent under concrete floor.

This is best implemented if a fixture rests close to the stack and the top floor of your home allowing the stack to serve as a vent. Home had a slab with oil furnace vents prebuilt into foundation early 1950 s after heavy rain. By david crosby issue 156. The true vent is aligned vertically and attaches to your drain line through the roof.

True vents also have no water running through them. Trimming concrete that is not level with the existing floor. It may be possible to simplify supply runs by moving a vent pipe over a few inches. It can also run under.

Cut a smaller opening in the ceiling for the vent pipe. Hvac ductwork in floor slabs. Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories. If you must run drainpipes across a floor carefully calculate the amount of vertical space available.

Pipe that supplies air to. How to run plumbing under concrete. With a slab on grade foundation there are no floor joists in which to run plumbing pipes. The vent stack is usually a 3 in.

Guide the vent pipe up through the hole and into the attic or room above and slip its lower end into the fitting at the floor. Drain and vent lines must be positioned precisely so you should install them before the supply pipes. Considerations cutting through a concrete floor should be a last resort. For a 1 1 2 inch vent pipe a 2 1 2 inch hole is sufficient.

Plumbing under a concrete floor layout is critical when the pipes are cast in stone. Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as. Once the concrete is out you can dig in the remaining trench to remove the sand or soil before running the new plumbing. Everything must be buried in the dirt prior to pouring the concrete.