A plumber typically starts by visually inspecting the toilet to identify any visible issues, such as leaks or cracks. They may also listen for unusual sounds or ask the homeowner about any specific symptoms they’ve noticed. In some cases, the plumber might use specialized tools, such as a plumbing snake or a video camera, to investigate the cause of the problem.

Plumbers use several methods to clear a clogged toilet, including:

1. Plunger: Using a plunger to create pressure and dislodge the blockage.
2. Plumbing snake: Inserting a flexible tool with a coiled wire or auger into the drain to break up or remove the obstruction.
3. Toilet auger: A specialized plumbing snake designed specifically for toilets, with a protective sleeve to prevent scratching the porcelain.
4. Hydro jetting: In more severe cases, plumbers might employ high-pressure water jets to blast away stubborn clogs.

To repair a leaking toilet, plumbers typically follow these steps:

1. Identify the source: Determine whether the leak originates from the tank, bowl, supply line, or wax seal.
2. Tank leaks: Replace faulty components such as the fill valve, flush valve, or tank bolts. If the tank is cracked, a new tank might be necessary.
3. Bowl leaks: Inspect and replace the wax ring seal between the toilet and the floor. If the bowl itself is damaged, a new toilet might be required.
4. Supply line leaks: Tighten or replace the supply line connecting the toilet to the water source.

To fix a continuously running toilet, plumbers typically take the following steps:

1. Check the flapper: Inspect the flapper valve, which controls water flow from the tank to the bowl. Adjust, clean, or replace the flapper if it’s not sealing properly.
2. Adjust the fill valve: Make sure the fill valve is adjusted correctly to achieve the proper water level in the tank.
3. Replace faulty components: If the flapper or fill valve is damaged, replacing them may be necessary to stop the continuous flow of water.

Plumbers commonly repair various toilet issues, including:

1. Clogs: Plunging, using a plumbing snake, or employing drain-cleaning chemicals to clear blockages in the toilet or the drainpipe.
2. Leaks: Repairing leaks in the tank, bowl, supply line, or wax seal.
3. Running water: Fixing a continuously running toilet by adjusting or replacing faulty components like flappers, fill valves, or overflow tubes.
4. Weak flushing: Resolving issues with inadequate flushing power, often caused by a faulty flapper, insufficient water in the tank, or a clog in the trapway.
5. Noisy operation: Repairing problems that cause unusual sounds during flushing, such as a damaged fill valve, loose parts, or water hammer.
6. Toilet installation: Installing new toilets, including connecting the water supply line, securing the tank to the bowl, and sealing the base.