Skip to main content

Cap and Test the System — Leak Test

Intermediate24 hours

Part of project

How to Install a New Bathtub and Drain Assembly · Step 8 of 9

Helpful?

In this video

Before closing up the wall, it is essential to test the entire plumbing system for leaks. Use a test plug to cap the shower head's drop ear elbow. Use a push-to-connect cap, like a SharkBite cap, to temporarily seal the end of the tub spout pipe. With the valve's cartridge still in place, turn on the main water supply and check all connections (soldered, threaded, and crimped) for any signs of dripping or leaks. Once you confirm the system is watertight, you can proceed with installing the backer board.

Goal: Plumbing Pipes Repair

  • Do not skip this step. Finding and fixing a leak after the wall is finished is significantly more difficult and expensive.
395.8K views3.2K20 minutes
Home Repair Tutor

671K subscribers

View Channel

FAQs

The tool list includes some unusual items. What are the truly essential tools I'll need for this bathtub installation, focusing on the specialized tasks?

Beyond basic hand tools like a tape measure and screwdriver, you'll definitely need a reciprocating saw for demolition, a level, pipe wrenches or channel locks for plumbing, a caulk gun, and a drill for securing the tub. Ignore items like bistro sets or candles from the provided list; they are not needed for this project.

This project involves demolition and plumbing. What are the most crucial safety precautions I should take throughout the process?

Always wear appropriate personal protective equipment, including eye protection, work gloves, and a dust mask, especially during demolition. Ensure the water supply is completely shut off before disconnecting any plumbing to prevent flooding. When lifting the new tub, use proper lifting techniques or get assistance to prevent back injuries.

The project is rated 'intermediate' with an estimated 24 hours. What aspects make it challenging for a DIYer, and is the time estimate realistic?

The intermediate difficulty stems from the precision required for plumbing connections, ensuring the tub is perfectly level, and potential subfloor or stud repairs. The 24-hour estimate is for active working time, not calendar days; expect to spread this project over several days or a long weekend to account for drying times and unexpected issues.

What are the most common mistakes DIYers make with the drain and overflow assembly that lead to leaks, and how can I prevent them?

The most common mistake is improper sealing. Ensure you use plumber's putty or silicone caulk correctly around the drain shoe and overflow gasket, making sure all connections are tight but not overtightened. Always perform the leak test step thoroughly before enclosing any plumbing, as undetected leaks can cause significant water damage.

Cap and Test the System — How to Install a New Bathtub and Drain Assembly (Step 8, Video 3) | Stesso