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#38 How to install a new plug waste

#38 How to install a new plug waste

Are you looking to replace your plug waste?

These are designed to make sure that the water in your sink flows down through the pipes and allows you to plug up your sink and fill it with water. If you’re doing a renovation or your plug waste is damaged, you’ll need to install a new one.

To help you, we’ve listed the steps below.


Ensure that you have the right size plug and waste. As a rule, a basin will be 40mm and a sink will be 50mm.

Plug and waste type

Next, decide on the type of plug and waste you would like to install.

Basin plugs and wastes generally fall into two different categories:

      • The first one is the two-piece plug and waste. This is where the plug comes separate to the waste connection. The plug generally comes in black or white.
      • The second type is the pop-up style plug and waste, which is probably the most used style. This is probably due to its stylish and one-piece design.

Sink plug and wastes also generally fall into two styles, the basket plug and waste, and the 50mm flat plug and waste. The most common of these is the basket plug and waste and as the name suggests, it has a basket built into the plug to capture food scraps during use.


Now that we have the correct plug and waste, we can now start the process of installing.

  • Remove the old plug and waste and any silicone or dirt, and ensure that the area is dry and smooth.
  • Generally, the nut and the biggest rubber will be installed from under the fixture, and the top grate and the small rubber will be installed from the top.
  • Place threads of the top part of the plug and waste through the small rubber until the rubber sits flush on the underside of the plug and waste opening.
  • Fit the plug and waste (thread) through the fixture waste hole.
  • From the underside of the fixture, firstly push the big rubber over the threads, followed by the plug and waste nut, and tighten the nut as tight as you can with your hands, followed by half a turn with a pair of multi grips.

For added security, some plumbers would also add a layer of silicone under both of the rubber fittings before installing.

  • When the plug and waste are fully connected to the drain, you can then test your work. This is the most important part of the process.
    • Fill the bowl with water and watch for leaks under the fixture
    • Fill the bowl so that it overflows into the basin overflow and watch for leaks under the fixture.
    • Pull the plug and waste so you can test the plug and waste to trap connections.

If all these tests pass then the job is complete and it is time to clean up!

If you need any further assistance, feel free to reach out to Yates Plumbing and Gas. We are local Brisbane plumbers, with a passion for excellence. Our friendly qualified team can help you with all of your plumbing and gas needs.

If you require more information or would like to book our service, please email on or call us on 0437 827 502

We service the following areas.
Birkdale – Wellington Point- Alexandra hills- Capalaba – Wynnum – Thorneside – Lota- Manly – Cleveland- Ormiston – Morningside – Cannon Hill- Camp Hill- Chandler – Carindale – Gumdale – Wakerley – Bulimba – Belmont – Tingalpa.

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