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How to fit a bath waste into a new and old bath

By / February 9th, 2023 / There are currently 0 comments

If you’re plumbing in a new bath, you will eventually come to fit the bath waste. Or, if your old bath waste has corrosion or is leaking or damaged, you may find yourself in a situation where you need to replace it.

Fitting a bath waste into a new or freestanding bath is much easier than replacing an existing one, as new and freestanding baths have an easy access route underneath.  

However, the replacement process for fitted baths is straightforward once you can access the underneath.

This guide will explain everything you need to know to fit a bath waste for a new bath and how to replace an old one, including what tools you need, how to fit a pop-up bath waste, and more. 

Table of contents

What is a bath waste?

The bath waste is the component that drains the water from your bath to the wastewater pipe going to the outside drain. 

A bath waste component has two sections; bath waste and overflow waste. The bath waste part connects the bath drain and waste trap, and the overflow waste funnels water away at the top of the bath when there is too much.

What is a bath waste?

The tools you need to fit a bath waste

How to replace a bath waste

If you are replacing an old bath waste, the first thing you need to do is get access to underneath the bath. Then, you can start removing the old bath waste. 

  1. First, use a screwdriver to unscrew the waste cover plate in the bathtub and remove it. Then remove the large washer. 
  2. Next, remove the old overflow cover or rose and the overflow waste.
  3. Unscrew where the bath waste connects to the wastewater trap and remove any old sealant so the new bath waste can slot in and sit flat. 
  4. Then, follow the steps below.

How to fit a bath waste into a new bath

If installing a new bath waste, follow our easy step-by-step guide.

Step 1: Choose your new bath waste

First, choose your new bath waste. Here at Build & Plumb, we have various styles and designs to browse. Why not browse our bath waste collection for modern and stylish baths?

Step 2: Prepare 

If you have a new bath, peel back any masking cellophane where you’re working around the plug holes.

If you have a bath waste ready, lay out all the pieces from the box, ensuring you have all the necessary components and read the manufacturer’s instructions carefully. 

Step 3: Attach the overflow pipe and waste

Locate the overflow pipe and the overflow waste and attach them with the washers and rings specified by the manufacturer to ensure a water-tight seal and tighten the nut. To ensure no water leaks, add some silicone seal or plumber’s gold to join them, to make the joint extra secure. 

Step 4: Check the pipe length

You might find that the overflow pipe is too long. Measure the correct length between the overflow and bath waste plates. Ensure that the piping doesn’t stick up too high inside the waste and overflow plates, or it could develop mould and gunk and cause a blockage. Once you’ve determined the correct pipe length, cut the pipe to size with your pipe cutters.

Step 5: Locate and attach the sealing rings

Locate the sealing rings for the bath waste and overflow plates. Then, attach them to the bath drain and overflow hole opening with sealant or plumber’s gold and wipe any access with a wonder wipe. You can now fix the bath and overflow waste to the bath drain holes.

Step 6: Attach the bath waste

Locate the overflow rose and bath waste cover and attach them on the front of the bath to the bath waste using a screw and screwdriver. 

To finish fitting the bath waste, you need to attach the bath waste to a waste trap and the wastewater pipe underneath the bath. You can either use push-fit pipes or solvent and solvent-weld pipes.

We have also answered some of your frequently asked questions below to ensure your project runs smoothly.

Bath waste FAQs

How do you hook up a flexible bath waste pipe?

Hooking a flexible bath waste pipe is a simple step in the bath waste installation process. Simply use washers, rings, a nut and silicone sealant to attach the flexible bath waste pipe or overflow pipe to your bath and overflow waste.

How to fit a pop-up bath waste

How to fit a pop-up bath waste

A pop-up bath waste is no different to fitting a regular bath waste. Follow the steps above in our “how to fit bath waste” guide, and once you have screwed in the bath drain cover, there will be a section to slot in the pop-up plug cover.

Should you use silicone when fitting a bath waste?

Yes. However, some plumbers prefer to use plumber’s gold. Using sealant with washers, rubber seals, and nuts ensures there won’t be any water leaks. 

Are all bath waste holes the same size?

The standard bath waste hole is 40 mm (1&1/12 inch). Additionally, a typical trap and waste pipe leading out of the bath is also 40mm (1&1/12 inch).

Conclusion: Bath wastes at Build & Plumb

There you have it, a simple guide on how to fit a bath waste into your bath at home. 

At Build & Plumb, we aim to supply you with the knowledge and information to succeed at DIY and plumbing in your home. Why not browse our collection of waste fittings online today? With the right plumbing tools, you can complete any plumbing job in your home.

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