How do I find a hidden water leak?

Hidden water leaks can cause thousands in damage if not caught early, but there are several ways to detect them before they become major problems.

Start by checking your water meter - this is the most reliable method. Turn off all water in your home, then check if the meter is still moving. If it is, you have a leak somewhere in your system. Write down the meter reading, wait an hour without using any water, then check again. Any change indicates a leak.

Look for visible signs throughout your home. Water stains on ceilings or walls, especially if they're growing or changing color, often indicate leaks behind drywall. Check for soft spots in flooring, particularly around toilets, under sinks, and near water heaters. Musty odors or unexplained mold growth are also red flags. Don't forget to inspect your toilet - add food coloring to the tank and see if it appears in the bowl without flushing.

Outside your home, walk your property looking for unusually green or soggy patches of grass, which could indicate underground pipe leaks. Check your water heater, washing machine connections, and the area around your foundation. In Ottawa's freeze-thaw climate, foundation cracks can develop that allow water intrusion, which homeowners sometimes mistake for plumbing leaks.

Professional leak detection becomes necessary when you suspect a leak but can't locate it. Licensed plumbers use specialized equipment like electronic leak detectors, thermal imaging cameras, and acoustic listening devices to pinpoint leaks behind walls or underground without destructive digging. This typically costs $200-$400 in Ottawa but can save thousands in unnecessary damage.

Time is critical with hidden leaks - even small ones can cause significant structural damage and mold growth over time. If you've confirmed a leak exists but can't find it, or if you're seeing signs of water damage, contact a professional immediately. For urgent leak detection in Ottawa, Ottawa Pro Plumbing offers emergency service to help prevent costly water damage to your home.