Trap Below Floor Or Below Joists

Beams in the floor require joist hangers.

Trap below floor or below joists. The p trap is an important component of sink plumbing that prevents toxic sewer gases from leaking into the home. In new construction you should readily be able to site a bathtub so its drain falls between joists rather than on top of a floor joist below. Beams under the floor joists allow the floor joists to go over. I have a trap from a first floor bathroom that is a few inches lower that the floor joist in the basement in which i plan on installing drywall on the ceiling.

If your home is more than 20 years old your floor joists are most likely solid wood 2x8s 2x10s or 2x12s. I have my p trap below the kitchen floor. If i install a trap inside the house proper a running trap freezing will not be an issue. I have added a pedestal sink to a first floor bathroom unfinished basement below and i need figure out where to put the trap.

There is a way to raise that tub trap and do so in a code compliant way without using a dry horizontal vent below the flood level of the bath tub. The issue here is that the trap would be more than 24 inches. Sometimes bathtub retrofits don t work out so. The floor joists are 2 x 10s and the joist cavity is insulated.

How far does a p trap have to be below a sink. I have heard that s traps are illegal so the only other option is to put a p trap just below the floor accessible from the basement. Chris cudmore aug 15 12 at 12 44. Attach the rim joists.

This may be an option if everything is located appropriately. Is this a common problem. How can i raise the trap so i don t have to install a soffit around the trap. As is stands i have a hole in the floor for directly below the sink.

Cantilevers allow the floor to be framed out past the foundation. The notching and boring rules of thumb for solid lumber are shown in fig. The length of the tailpiece that. Problem is the p trap almost touches the bottom of the joist cavity and is likely to freeze being very close to the exterior of the house.

Follow the rules to keep your floor solid. Trap is below floor joist. Cut and install the floor joists between the rim joists. The photo marked attachment 48110 shows the vent pipe turning upwards through the floor i suggest removing that elbow and replace it with a vertical ty aim the ty branch at the tub drain.