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
Ignite a propane torch and heat the joint, focusing the flame on the brass fitting rather than the copper pipe. When the flux starts to bubble and smoke, touch the end of the solder to the seam where the pipe meets the fitting. The heat from the fitting should melt the solder and draw it into the joint. Move the solder around the entire seam to ensure a complete seal. Once done, turn off the torch and use a wet rag to wipe away any excess flux.
Goal: Create a watertight solder joint
- The crackling sound indicates residual water boiling off inside the pipe. Ensure all water is gone before applying solder for a successful joint.
- Wear safety glasses and protect the tub surround from the flame with a heat shield or wet rags.
- Heat the fitting, not the solder directly. If the joint is hot enough, it will melt the solder and capillary action will pull it into the gap for a strong bond.
Used in this video
- Propane Torch — Heating the pipe and fitting for soldering
- Rag — Wiping away excess flux after soldering
- Heat Shield · optional — Protecting the wall and tub surround from the torch flame
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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
Ignite a propane torch and heat the joint, focusing the flame on the brass fitting rather than the copper pipe. When the flux starts to bubble and smoke, touch the end of the solder to the seam where the pipe meets the fitting. The heat from the fitting should melt the solder and draw it into the joint. Move the solder around the entire seam to ensure a complete seal. Once done, turn off the torch and use a wet rag to wipe away any excess flux.
Goal: Create a watertight solder joint
- The crackling sound indicates residual water boiling off inside the pipe. Ensure all water is gone before applying solder for a successful joint.
- Wear safety glasses and protect the tub surround from the flame with a heat shield or wet rags.
- Heat the fitting, not the solder directly. If the joint is hot enough, it will melt the solder and capillary action will pull it into the gap for a strong bond.
Used in this video
- Propane Torch — Heating the pipe and fitting for soldering
- Rag — Wiping away excess flux after soldering
- Heat Shield · optional — Protecting the wall and tub surround from the torch flame
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.