How do I fix a running toilet?

A running toilet is usually caused by a few common issues that are relatively easy to diagnose and fix yourself. The most frequent culprits are a warped flapper that won't seal properly, a chain that's too long or short, or a water level that's set incorrectly.

Start by removing the toilet tank lid and looking inside. If water is continuously running into the bowl, check if the rubber flapper at the bottom of the tank is seating properly. The flapper should lay flat against the flush valve seat - if it's warped, cracked, or has mineral buildup preventing a good seal, it needs replacement. You can find replacement flappers at any hardware store for under $10.

Check the chain connecting the flush handle to the flapper. If the chain is too long, the flapper won't lift fully when you flush. If it's too short, the flapper can't close completely. Adjust the chain so there's about 1/2 inch of slack when the flapper is closed. The chain should lift the flapper fully when you press the handle, then allow it to drop and seal completely.

Examine the water level in the tank. The water should sit about 1 inch below the rim of the tank. If it's too high, water will continuously flow into the overflow tube. You can adjust this by bending the float arm (on older toilets) or adjusting the float mechanism (on newer models). The fill valve may need replacement if adjustments don't solve the problem.

In Ottawa's hard water conditions, mineral buildup can cause these components to fail more frequently. If these basic adjustments don't solve the running toilet, or if you're uncomfortable working with the internal mechanisms, the issue might be a worn fill valve or flush valve assembly that requires replacement. For persistent problems or if you're planning other bathroom updates, Ottawa Bathrooms can handle toilet repairs and replacements as part of comprehensive bathroom renovations.

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