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Flush System and Check for Leaks — Restore Water and Check for Leaks

Beginner4 hours

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How to Install an Air Chamber to Prevent Water Hammer · Step 6 of 6

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In this video

After soldering all connections and allowing them to cool, turn the main water supply back on. Let water run through the open valve body for about 15 seconds to flush out any debris, such as solder flux or copper shavings. While the water is on, carefully inspect all the new joints for any signs of leaks. Once flushing is complete and you've confirmed there are no leaks, turn the water supply off. Reinsert the cartridge, making sure the 'HC' marking is at the top, and secure it by reinserting the retainer clip.

Goal: Clear debris and verify connections

  • If you find a leak, you will need to drain the system, clean the joint, and re-solder it.
  • Make sure the notch on the end of the cartridge is facing up when you reinstall it.

Used in this video

  • Pliers (Tool Type: Pliers) · optionalAssisting with reinserting the retainer clip if needed.
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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.

Flush System and Check for Leaks — How to Install an Air Chamber to Prevent Water Hammer (Step 6, Video 2) | Stesso