How to put a washer on a PVC pipe

Written by c.l. rease
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There are two washers common to PVC plumbing. A flanged washer often sits where the PVC pipe connects to the sink drain basin of a kitchen sink and the tapered slip washer that seals the connections between the down tube coming from the sink and the connections of the P-trap. The tapered washer is the more common of the two as it is used on all sinks using a removable P-trap. If you install the slip washer improperly, the joint will not seal allowing water to leak from the connections.

Skill level:
Moderately Easy

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Things you need

  • Clean rags
  • Drain assembly kit

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Instructions

  1. 1

    Wipe the PVC pipe with a clean rag to remove light dirt from the pipe's surface.

  2. 2

    Place the flanged washer onto the top of the flanged down tube, with the down turned edge resting inside of the PVC pipe.

  3. 3

    Secure the down tube to the base of the sink per the drain kit installation instructions.

  4. 4

    Slide the slip nut onto the down tube, with the threaded inner section of the nut facing the bottom of the sink cabinet.

  5. 5

    Hold the slip washer in your hand, with the tapered side of the slip washer facing down.

  6. 6

    Place the slip washer at the base of the down tube, ensuring that the thicker end of the slip washer facing toward the pipe.

  7. 7

    Push the slip washer onto the PVC pipe and slide it one-inch up from the pipe's bottom edge.

  8. 8

    Repeat the procedure to install the slip washers at each PVC connection.

  9. 9

    Connect the PVC pipe as described in the assembly instructions.

  10. 10

    Turn on the water and check each slip connection for signs of water leaks. If you find a leak, undo the connection that leaks and ensure that the slip washer is installed properly, with the taper of the washer facing toward the connection.

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