Toilet Maintenance Checklist: Safe Monthly and Seasonal Checks

A practical toilet maintenance routine

Listen for running water, look for moisture and movement, and clean the fixture according to its manufacturer's care instructions. A few regular checks can reveal trouble early without opening concealed systems or forcing old shutoff valves. Clean the bowl, seat, lid, hinges and exterior using products and tools approved for each surface, following their labels and the fixture maker’s care instructions.

Monthly: listen and look

• After a normal flush, listen for water that continues after refill or starts again between uses. Note the timing; a short refill after sitting can indicate tank-to-bowl water loss.
• Look for moisture at the tank, visible supply connection, base and floor. Condensation can wet the exterior too, so dry the area and observe where moisture returns without tightening parts.
• Check whether the seat fasteners are visibly loose and whether the bowl rocks. Do not rock it further or tighten a cracked fixture; a moving bowl or soft floor needs inspection.

Check for a silent tank leak

For an identified conventional gravity toilet with a removable lid, lift the lid with both hands and set it on a towel. EPA WaterSense recommends adding a few drops of food coloring to the tank and waiting 10 minutes without flushing. Color in the bowl indicates tank-to-bowl leakage; flush promptly afterward to reduce staining. The test does not identify the failed seal or part. Do not apply this procedure to concealed, pressure-assisted or unidentified tanks.

Seasonal checks and stop points

Look for corrosion or moisture at accessible supply connections and locate the toilet shutoff, but do not force a stuck or leaking valve. Note repeated clogs, gurgling, odor or a bowl water level that changes. After an overflow, keep people away from wastewater and clean affected surfaces using appropriate product instructions; do not mix cleaners.

Call a plumber for an external leak, cracked porcelain, rocking, soft flooring, repeated clogs or an unsafe shutoff. If wastewater backs up through another fixture, stop using water and contact the sewer utility and a plumber.

Sources

• EPA WaterSense: Fix a Leak Week — ten-minute dye test and household leak checks; accessed October 27, 2026.
• Roxborough Water and Sanitation District: Avoid Sewer Backups — stop-water guidance during a backup; accessed October 27, 2026.