Yes, hidden water leaks can persist for weeks or months without your knowledge. Slow leaks frequently occur inside finished walls, beneath subfloors, underground in main supply lines, or behind shower tile enclosures where they remain completely invisible. Common warning signs of a hidden leak include unexplained spikes in your monthly municipal water bill, damp or warped drywall, peeling wallpaper, musty mildew odors, or the sound of running water when all household faucets are turned off. Verification: Monitor your water meter dial when all taps are closed to check for hidden continuous flow.
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