Skip to main content

Demolish Old Plumbing — Prepare the Installation Area

Intermediate16 hours

Part of project

How to Install and Level a Shower Pan Base · Step 1 of 9

Helpful?

In this video

First, remove any old paneling or wainscoting covering the work area using a drill or pry bar. Next, use a reciprocating saw or pipe cutters to sever the old water supply lines. Then, unscrew and detach the old washer outlet box from the wall studs. Finally, cut out the old PVC drainpipe assembly, including the standpipe and P-trap, to clear the space for the new installation.

Goal: Remove old plumbing fixtures

  • Ensure the water is shut off before cutting any supply lines.

Used in this video

  • Reciprocating Saw (brand: Milwaukee, Power Source: Battery-powered)Cutting old pipes and potentially paneling.
  • Drill/Driver (brand: Milwaukee, Power Source: Battery-powered)Removing screws from paneling and the old washer box.
  • Gloves (brand: MaxiFlex, Material: Nitrile coated fabric)Protecting hands during demolition.
106.0K views3.3K30 minutes
Oatey Co

24K subscribers

View Channel

FAQs

How difficult is it to install a shower pan for a DIYer, and what's the realistic time commitment?

This is an intermediate project, requiring precision and patience, especially with leveling and mortar work. While the estimated time is 16 hours, allow extra time for potential subfloor repairs or unexpected issues. Rushing can lead to costly mistakes, so take your time and don't skip steps.

Why is a mortar bed crucial for a new acrylic/fiberglass shower pan, and which type should I use?

A mortar bed provides essential solid support beneath the shower pan, preventing flex, squeaks, and potential cracking over time. It also allows you to precisely level the pan for proper drainage. The project specifically calls for Type S mortar, such as Greencore or Quikrete mortar mix.

What are the most critical steps to ensure my shower pan is perfectly level and drains correctly?

Accurate leveling begins with a solid, level subfloor. Dry-fit the pan multiple times, marking its position and checking it with a long level in all directions. When setting the pan into the mortar, continuously check for level and adjust the mortar bed as needed before the mortar begins to set.

What precautions should I take to prevent leaks around the drain assembly and where the pan meets the wall?

Ensure the drain fitting is properly installed and sealed according to its manufacturer's instructions, using plumber's putty or silicone caulk as recommended. Secure the pan's flanges to the wall studs precisely, and apply a waterproof sealant where the pan meets the wall before installing wall coverings to prevent moisture intrusion.

Demolish Old Plumbing — How to Install and Level a Shower Pan Base (Step 1, Video 1) | Stesso