How To Remove Old Bathtub Drain Pipe

How To Remove an Old Bathtub Drain Pipe

Removing an old bathtub drain pipe can seem daunting, but with the right tools and a methodical approach, it's a manageable DIY project. This article provides a step-by-step guide to safely and effectively remove a bathtub drain pipe, preparing you for a new drain installation or other plumbing work.

1. Gather Necessary Tools and Materials

Before beginning any plumbing project, assembling the necessary tools and materials ensures a smooth and efficient process. For removing a bathtub drain pipe, you'll need:

Safety glasses and work gloves
Drain remover wrench (also known as a drum or spud wrench)
Pliers (channel-lock and slip-joint)
Screwdriver (flathead and/or Phillips)
Putty knife
Penetrating oil (such as WD-40)
Bucket or container
Old towels or rags
Optional: Reciprocating saw with metal-cutting blade (for difficult removals)

Having these items readily available will prevent interruptions and streamline the removal process.

2. Prepare the Work Area

Preparing the workspace is crucial for safety and efficiency. First, turn off the water supply to the bathtub. This can usually be accomplished by locating the shut-off valves behind the access panel for your bathtub plumbing. Once the water is off, drain any remaining water in the tub. Place old towels or rags around the work area to protect the bathtub surface and absorb any spills. A bucket placed beneath the drain opening will catch debris and wastewater.

3. Remove the Drain Stopper

Bathtub drain stoppers come in various designs. The most common types include push-and-pull, lift-and-turn, and trip-lever. Consult your bathtub's manufacturer instructions for the specific removal procedure for your stopper type. Generally, removing the stopper involves unscrewing a visible nut, lifting out the stopper assembly, or releasing a retaining clip. Once the stopper is removed, clean any debris or hair from the drain opening.

4. Loosen the Drain Flange

The drain flange is the metal ring visible inside the bathtub, connected to the drain pipe. Over time, this flange can become corroded and difficult to remove. Apply penetrating oil to the threads of the drain flange and allow it to sit for several minutes to help break down any rust or buildup. Then, use the drain remover wrench to grip the crossbars inside the drain flange and turn it counterclockwise. If the flange is particularly stubborn, applying steady pressure and multiple applications of penetrating oil may be necessary.

5. Disconnect the Drain Pipe

Once the drain flange is loose, it can be unscrewed by hand. Beneath the flange, you'll find the drain pipe, typically connected to a P-trap assembly. The connection point may be a threaded fitting or a slip-nut connection. If it's a threaded connection, use pliers to carefully loosen and disconnect the pipe. For a slip-nut connection, loosen the nut and slide it away from the pipe fitting. Be prepared for water to spill out as you disconnect the drain pipe, and have your bucket ready to catch it.

6. Remove the Overflow Drain (if applicable)

Some bathtubs have an overflow drain, a separate pipe connected near the top of the tub designed to prevent overflows. If your bathtub has an overflow drain, access the connection behind the tub wall or through the access panel. The overflow drain is typically connected to the main drain pipe with a slip-nut or threaded fitting. Disconnect the overflow drain pipe using the appropriate method.

7. Address Stubborn Drain Pipes

In some cases, the drain pipe might be severely corroded or seized, making removal with standard tools difficult. If this occurs, a reciprocating saw with a metal-cutting blade can be used to carefully cut through the drain pipe below the tub. Ensure the saw blade is appropriate for cutting metal and take necessary safety precautions when operating power tools.

Once the old drain pipe is removed, the opening should be thoroughly cleaned to prepare for the installation of a new drain assembly. This involves removing any remaining sealant, debris, and rust. Proper preparation is essential for a successful and leak-free installation of the new drain pipe.