How do I fix a toilet that won't flush properly?

A toilet that won't flush properly is usually caused by low water level in the tank, a clogged drain, or faulty internal components - most of these issues can be diagnosed and often fixed with basic troubleshooting.

Start by removing the toilet tank lid and checking the water level. The water should sit about 1 inch below the rim of the overflow tube. If it's too low, the flapper chain might be too long or broken, preventing the flapper from sealing properly. Adjust the chain so there's slight slack when the flapper is closed. If the water level is correct but the flush is weak, the rim holes under the toilet bowl rim might be clogged with mineral deposits - use a wire coat hanger or toilet brush to clear them.

Check the flapper and flush valve seat for warping or mineral buildup that prevents a tight seal. A warped flapper won't hold water in the tank, leading to weak flushes. The fill valve might also need adjustment if water runs continuously or the tank fills too slowly. In Ottawa's hard water areas, mineral buildup is common and can affect all these components.

If the toilet gurgles, drains slowly, or water backs up, you likely have a drain blockage. Try a plunger first - use a toilet plunger (with the extended flange) and create a good seal. Pump vigorously 10-15 times. For stubborn clogs, a toilet auger can reach deeper blockages that a plunger can't clear.

When to call a professional: If you've tried these steps and the problem persists, if water leaks from the base (indicating a wax ring failure), or if multiple fixtures in your home are backing up (suggesting a main line issue). Toilet replacement in Ottawa typically costs $300-500 including installation, while most repairs run $150-300.

For persistent flushing issues or if you're uncomfortable with these repairs, Ottawa Pro Plumbing can diagnose the problem quickly and provide a lasting solution.

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