Skip to main content

Test System for Leaks (Pre-Drywall) — Inspect and Test for Leaks

Beginner

Part of project

How to Solder Copper Pipes for a Permanent, Watertight Joint · Step 9 of 9

Helpful?

In this video

Before installing drywall, turn on the water supply to test the system. Use a wrench to turn the valves on and off, checking for proper operation. Carefully inspect all connections, including where the PEX lines enter the valves and all solvent-welded drain joints, for any signs of water leakage. Tighten any compression fittings if necessary.

Goal: Verify all plumbing connections are watertight before closing the wall.

  • Check for leaks before you install drywall.

Used in this video

  • Pipe Wrench (Tool Type: Plumbing Tools, Power Source: Manual)Operating the valves and tightening connections if needed.
2.1K views410 minutes
The Plumbers Plunger

201K subscribers

View Channel

FAQs

What are the most critical safety precautions I must take when soldering copper pipes?

Always work in a well-ventilated area to dissipate fumes and keep a fire extinguisher or bucket of water nearby. Ensure no flammable materials are close to your workspace, as the torch flame can be intense. Wear safety gloves and eye protection to guard against heat, hot solder splashes, and open flames.

My solder isn't flowing smoothly into the joint; it's just beading up on the outside. What's wrong?

This usually indicates the pipe isn't hot enough or isn't evenly heated around the entire joint. The copper must reach the proper soldering temperature for capillary action to draw the solder in – the solder should melt when touched to the hot pipe, not directly by the torch flame. Also, ensure your pipes and fittings were thoroughly cleaned and properly fluxed, as contaminants prevent proper solder flow.

Why is meticulous cleaning and deburring of the pipes and fittings so crucial before soldering?

Meticulous cleaning and deburring are vital because solder needs clean, bare copper to adhere properly. Any dirt, corrosion, or burrs will prevent the solder from flowing completely into the joint via capillary action, leading to weak spots and potential leaks. This step ensures the solder creates a strong, permanent, and watertight seal.

The project lists a few torch options. Which type of propane torch is best for a beginner trying to solder copper pipes?

For a beginner, the Flame King Multi-Purpose Propane Torch with a Wide Pencil Head (YSNAX1-003) is often easier to control. Its broader, less intense flame heats the joint more gently and evenly, reducing the risk of overheating the copper. The High Intensity torch provides a faster, more focused heat, which can be challenging for those new to soldering.

Test System for Leaks (Pre-Drywall) — How to Solder Copper Pipes for a Permanent, Watertight Joint (Step 9, Video 3) | Stesso