You'll probably find one with a plastic or metal slip nut under your kitchen or bathroom sink. A rubber or PVC washer sits beneath the metal slip nut. As the slip nut is tightened, the washer compresses, providing a leak-proof seal.

Installing Slip Joint Washers In Plumbing


Slip joints are commonly found under kitchen and bathroom sinks because they are employed as part of a P-trap. Slip joint fittings are most commonly used to connect the drains in a double bowl sink. Plastic or metal slide nuts are available, each with its own set of benefits and drawbacks. Plastic slip nuts' threads can become stripped over time, whereas metal slip nuts can corrode and fracture.

Slip joint washers are commonly tapered on one end. This permits the washer to better fit into the joint, resulting in a better seal. Because slip joints are frequently used with P-traps, slip joint washers are also referred to as P-trap washers. P-trap washers can be utilized with a variety of pipe materials, including PVC and brass.


Sink leaks can be prevented by using slip joints. Plastic or metal slip nuts with a washer beneath them are used. The washer is squeezed when the slip nut is tightened, providing a seal that prevents leaking.

How To Install Slip Joint Washers In Plumbing

To install a slide joint washer, follow these steps:

  • Fırst, get the pipe ready. Make sure it's the correct length before you cut it. Any burrs on the pipe's end should be removed with a cloth or towel.
  • Second, the slip nut is then slipped onto the pipe. Make sure the threads face the end of the pipe you've prepared when you slide it. Make sure that the threads on the sink basket strainer's tailpiece are facing the self-seating end of the tailpiece before sliding another slip nut on.
  • Third, the slide joint washer is then slid onto the pipe. Make sure the slip joint washer's thicker edge faces the slip nut and the washer fits securely against the pipe. Make sure the washer is about 2 inches away from the pipe's edge to give it enough room to glide into the threaded fitting.
  • Fourth, the slip joint must be tightened. Do the following to tighten the slip joint:

By putting the pipe into the threaded fitting, you can ensure that it will fit into the flared fitting.

Continue pressing the pipe until the washer is in the threaded fitting if the fitting isn't flared.

Now press the slip joint washer into place, making that the tapered end is snug against the thread fitting and straight.

Finally, put the slip joint nut over the slip joint washer and tighten by hand until the threads are secure.

  • Fifht, checking for leaks. Tighten any other slip joint before checking. Turn on the water and look for any leaks.

If there are leaks, tighten the slip joint using pliers until the leak stops, or crank the slip joint nut a quarter turn.

If the leakage does not stop, loosen the nut and double-check that the slip joint washer on the tapered end was not placed backwards against the slip nut.

Re-tighten the washer onto the threads, being careful not to overtighten it.

How To Use Slip Joint Washers?

Slip joint washers can be utilized in a variety of applications. They are necessary in the plumbing industry to prevent leaks. Wall drains, floor drains, p-traps, and pipelines can all be plumb with slip joint washers. You should think about the size of your appliances before buying a washer.

It's also important to choose the sort of washer. Rubber washers, simple washers, and spring washers, for example, are commonly used in drains. To utilize slip joint washers, you'll need to buy slip joint nuts, which will assist you to tighten them into position to achieve their purpose.