How Install Trap Floor Drain

Whether you're adding another shower to your home or just need to replace your existing shower plumbing, installing a shower trap drain into the floor is a necessary step. Trap floor drains will help increase the productivity of your drainage system and will help prevent clogging more so than the average drain. New pre-formed shower bases have simplified the process significantly; however, the process can still be difficult, especially if you are working with old plumbing.

Things You'll Need

• Pipes
• Pipe fittings
• Saw
• Subfloor material
• Cement
• Joist
• Silicone sealant

Instructions

1. Remove the existing shower base to expose the piping beneath. Using a saw, cut through the subfloor and remove it. Remove the existing piping and p-trap and discard the old pieces. Make note of the size and length of the existing piping so that you can buy replacement pipes that are the same width and length.

2. Install a new piece of subfloor over the shower base. Mark and cut a hole over the area where the p-trap will be set. Use a joist to cut the hole if possible. Make sure the drain line is sloping 1/4 of an inch for every foot of piping and that the p-trap hole falls directly above the shower drain hole.

3. Once the p-trap is in place, begin cementing the p-trap together with the existing parts of the piping. Hold the pieces together for 20 seconds to ensure that the cement is properly secured in place. Cement the p-trap/drain line connection after all the other pieces have been secured together.

4. After securing the cement, quickly plumb the new p-trap with a level before the joints set together to ensure that there are no blockages in your piping. Replace the shower base in its original position and use silicone sealer to seal the joints between the tiles and base.

References

• Rd.com: Installing Trap Floor Drain