View Full Version : Poly Slip-Joint Washer: Which Direction?

06-03-2007, 11:26 AM
Which direction should a poly slip-joint washer be installed: pointing (up) toward the tailpiece or pointing (down) in the direction of water flow?

- Bernie

06-03-2007, 12:06 PM
In the direction of water flow. The threaded nut screws on and drives the slip nut tight between the pipe and fitting making a water tight seal.

06-03-2007, 12:17 PM
This is true for any conical washer, sleeve, seal or ferrule: The flat end always faces the nut.

06-03-2007, 12:41 PM
Front/back or up/down with a slip washer means nothing because we don't know if you are looking at it correctly. The flat side goes against the slip nut so it can push the beveled side into the joint between the pipe and the fitting.

06-04-2007, 05:00 PM
Thanks, everyone. That's what I thought. The slip-joint I bought that morning had the slip washer upside down and I just wanted to be sure before installing it.

- Bernie