Open the cold valve, then the hot valve. Leave them open for 30 seconds to let the cold pressure clear the hot line. When to Call a Pro
Banging or "glugging" sounds (water hammer) behind the walls. Method 1: The "Two-Tap" Hose Trick (Most Effective) how to clear an airlock in hot water system
If you're experiencing any of the following symptoms, it's possible that you have an airlock in your hot water system: Open the cold valve, then the hot valve
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