How to Install a Bathtub Trap


Installing a trap for a bathtub requires a little planning. If you have one in place the change over can be quite simple, provided you have the access and the tools.

Things You'll Need

  • pipe saw
  • 1 1/2 inch pvc or abs pipe
  • pipe dope
  • p-trap
  • glue
  • cleaner
  • trap adapter
  • 1 1/2 inch pvc or abs coupling
  • Most times the trap is accessible from the back wall in the adjacent room from the bathroom, Sometimes the tub wall is against a closet and you will need to cut a hole in the closet wall for access, Sometimes the trap is accessible from the basement. After you have figured out where the trap is you will be ready to replace it.

  • To replace a trap that already exists you will want to cut it out. Cut the horizontal pipe that leads to the branch drain. this is right after the exit of the trap leading into the main.

  • Remove trap You can use this as a model and cut pipe to fit into the new trap, Or you can make all your measurements from scratch.

  • Attach the pipe to the trap adapter, by gluing both pieces together, Next glue the u shape part to the pipe you just glued to the trap adapter, install this onto the trip lever coming down from the tub, Now take the piece you cut for the horizontal pipe glue this to the j shape end of the trap and glue these to the branch run of the drain, Now glue the rest of the trap together.

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