If you’re a DIYer running pipes, we’ll help you navigate plumbing through the trickiest spots.
In a new building, or an addition where the framing is exposed, this is easy.
Replacing finished surfaces after plumbing (especially patching walls) usually takes several days.
Credit: Jim Franco
Learn how to navigate tricky spots through walls and floors with these instructions.
Remove the wall surface up to the ceiling.
Prep for New Pipe
Cut a hole allowing some wiggle room for the new pipe.
Cut away a 10-inch by 2-foot section of flooring.
Assemble and Place Drainpipe
Assemble the approved fittings onto the top of the drainpipe.
Take special care that they face the right direction.
The drainpipe should be longer than needed.
you could cut it to size later from below.
Slip the pipe down through the hole.
Guide and Attach Pipes
Anchor the drainpipe with straps.
Cut a smaller opening in the ceiling for the vent pipe.
For a 112-inch vent pipe, a 212-inch hole is sufficient.
Running drainpipe through joists calls for meticulous work.
Vent pipes might run level, although some codes call for a slight slope toward the main drain.
All drain lines must be sloped.
For a precise slope, strike a level line on the studs and measure down 14-inch per running foot.
Note that codes might also call for fireproof caulking in walls.
To keep pipes from rattling, line the holes with felt or use wood shims.
If notches are needed, make them as small as possible, as they weaken the framing member.
you might also use metal plates to protect pipes from nails.
Tips for Running Pipe Through a Floor
Tips for Running Pipe Through a Wall
