Solder the Joint — Solder the Joints
Part of project
How to Install an Air Chamber to Prevent Water Hammer · Step 5 of 6
In this video
Place a heat-resistant mat behind the joint for protection. Using a propane torch, heat the copper pipe just behind the fitting first for a few seconds. Then, move the flame to heat the fitting itself. Once hot enough, touch the lead-free solder to the seam of the joint, opposite the flame. The heat will draw the solder into the joint, filling it completely. Move the solder around the joint to ensure full coverage.
Goal: Create a Watertight Solder Joint
- When the flux starts to bubble and smoke, the joint is nearly ready for solder. When the solder melts on contact without the flame, the temperature is correct.
- Do not overheat the joint, as this can burn the flux and prevent the solder from adhering properly.
Used in this video
- Propane Torch (brand: Bernzomatic, Tool Type: Power Tools, Power Source: Gas) — Heating the copper pipe and fitting to melt the solder.
- Heat-Resistant Mat (Tool Type: Safety Equipment) — Protecting surrounding surfaces from the torch flame.
- Lead-Free Solder (Material Type: Solder Material, Solder Material: Lead-free solder) — The metal alloy that melts to join the pipe and fitting.
644K subscribers
FAQs
This project is rated 'beginner.' What's the biggest challenge, and what unexpected costs should I budget for?
The biggest challenge for beginners is often the soldering, which requires a steady hand and practice. Beyond the listed materials, budget for essential safety gear like a fire extinguisher or bucket of water, heat-resistant gloves, and proper eye protection. The total material and basic tool cost could range from $50-$150 if you need to purchase all soldering equipment.
What are the essential safety precautions I must take, especially when using a torch for soldering?
Always have a fire extinguisher or a bucket of water nearby when soldering, and ensure the work area is well-ventilated to avoid inhaling fumes. Wear appropriate eye protection and heat-resistant gloves to prevent burns. Before cutting any pipes, confirm the main water supply is completely off and the pipes are fully drained to prevent unexpected sprays or electrical hazards.
If I'm not comfortable with soldering, are there alternative connection methods for installing the air chamber?
Yes, if soldering isn't your preference, you can use push-fit fittings, like SharkBite, which don't require heat or special tools beyond a pipe cutter. These fittings create a secure, watertight seal by simply pushing the pipe into the fitting. While often more expensive than traditional copper fittings, they offer a beginner-friendly alternative for quick installation.
What's the most common reason a newly installed air chamber might not stop water hammer, and how do I fix it?
The most common reason is an insufficient air cushion or the chamber being too short. Ensure the air chamber is installed vertically with the capped end pointing upwards, allowing air to be trapped effectively. If water hammer returns, the air cushion may have depleted; you can recharge it by shutting off the main water supply and draining the system to refill the chamber with air.
Solder the Joint — Solder the Joints
Part of project
How to Install an Air Chamber to Prevent Water Hammer · Step 5 of 6
In this video
Place a heat-resistant mat behind the joint for protection. Using a propane torch, heat the copper pipe just behind the fitting first for a few seconds. Then, move the flame to heat the fitting itself. Once hot enough, touch the lead-free solder to the seam of the joint, opposite the flame. The heat will draw the solder into the joint, filling it completely. Move the solder around the joint to ensure full coverage.
Goal: Create a Watertight Solder Joint
- When the flux starts to bubble and smoke, the joint is nearly ready for solder. When the solder melts on contact without the flame, the temperature is correct.
- Do not overheat the joint, as this can burn the flux and prevent the solder from adhering properly.
Used in this video
- Propane Torch (brand: Bernzomatic, Tool Type: Power Tools, Power Source: Gas) — Heating the copper pipe and fitting to melt the solder.
- Heat-Resistant Mat (Tool Type: Safety Equipment) — Protecting surrounding surfaces from the torch flame.
- Lead-Free Solder (Material Type: Solder Material, Solder Material: Lead-free solder) — The metal alloy that melts to join the pipe and fitting.
Frequently Asked Questions
This project is rated 'beginner.' What's the biggest challenge, and what unexpected costs should I budget for?
The biggest challenge for beginners is often the soldering, which requires a steady hand and practice. Beyond the listed materials, budget for essential safety gear like a fire extinguisher or bucket of water, heat-resistant gloves, and proper eye protection. The total material and basic tool cost could range from $50-$150 if you need to purchase all soldering equipment.
What are the essential safety precautions I must take, especially when using a torch for soldering?
Always have a fire extinguisher or a bucket of water nearby when soldering, and ensure the work area is well-ventilated to avoid inhaling fumes. Wear appropriate eye protection and heat-resistant gloves to prevent burns. Before cutting any pipes, confirm the main water supply is completely off and the pipes are fully drained to prevent unexpected sprays or electrical hazards.
If I'm not comfortable with soldering, are there alternative connection methods for installing the air chamber?
Yes, if soldering isn't your preference, you can use push-fit fittings, like SharkBite, which don't require heat or special tools beyond a pipe cutter. These fittings create a secure, watertight seal by simply pushing the pipe into the fitting. While often more expensive than traditional copper fittings, they offer a beginner-friendly alternative for quick installation.
What's the most common reason a newly installed air chamber might not stop water hammer, and how do I fix it?
The most common reason is an insufficient air cushion or the chamber being too short. Ensure the air chamber is installed vertically with the capped end pointing upwards, allowing air to be trapped effectively. If water hammer returns, the air cushion may have depleted; you can recharge it by shutting off the main water supply and draining the system to refill the chamber with air.