How to Prevent Bathroom Water Leaks
(Before They Cause Damage)
Bathrooms are one of the most common places for water leaks—and one of the most expensive when it comes to repairs. A small leak under a sink or behind a toilet can lead to mold, rot, and even structural damage if left unchecked.
Here’s how to prevent bathroom water leaks and keep your home safe.
🧼 1. Inspect Under Sinks Regularly
Check for moisture, corrosion, or water stains around pipes and valves. Tighten loose connections and replace worn-out supply lines before they fail.
🚽 2. Check Toilets for Leaks
A worn-out flapper or faulty fill valve can waste hundreds of gallons of water per month. Use the food coloring test to see if water leaks from the tank to the bowl.
🚿 3. Seal Around Tubs and Showers
Inspect caulking and grout around tubs, tiles, and shower doors. Cracked or missing sealant allows water to seep into the walls and subfloor.
Re-caulk at least once a year or as needed to keep moisture out.
🧰 4. Replace Old Fixtures and Hoses
Over time, fixtures like faucets and showerheads can corrode or loosen. Rubber supply hoses (especially on toilets) can crack and burst—replace them with braided stainless steel for extra protection.
🧯 5. Know the Signs of a Hidden Leak
- Musty odors
- Mold or mildew in corners
- Warped baseboards or flooring
- Discoloration on walls or ceilings below the bathroom
If you see these, you may have a hidden leak inside the walls or under the floor.
🔍 Stop Leaks Before They Start
Preventative maintenance is the best way to avoid costly water damage. But when you need help finding the source of a leak, First Class Leak Detection is here to help. We use non-invasive tools to pinpoint hidden leaks fast, no guesswork, no destruction.
