How do you open a toilet drain?

To open a toilet drain, usually you're trying to clear a clog. Here's how to do it, primarily using a plunger:

Steps to Unclog a Toilet Drain

Assess the Water Level: Make sure there's enough water in the toilet bowl to submerge the head of your plunger. If there isn't, add water. If it's overflowing, remove some with a small container. The water helps create the necessary suction.
Prepare the Plunger: Use a toilet plunger, which has a soft rubber flap that folds out from the bottom. Fold out the flap for a better seal.
Position the Plunger: Carefully place the plunger over the drain opening at the bottom of the bowl. Ensure the rubber cup is completely submerged in water to create a tight seal.
Plunge Vigorously: Push and pull the plunger up and down with steady, even strokes. It's important to maintain the seal; don't break contact between the plunger and the bowl's surface. On the upstroke, only lift the plunger an inch or two to maintain suction.
Be Patient: You may need to plunge for several minutes before the clog dislodges. Keep at it!
Check for Drainage: After a few minutes of plunging, remove the plunger and see if the water drains. If it does, flush the toilet to ensure the clog is completely gone.
Repeat if Necessary: If the water doesn't drain, repeat the plunging process.

If a plunger doesn't clear the clog, you may need to try other methods:

Toilet Auger (Snake): A toilet auger is a flexible tool designed to break up or retrieve clogs deep within the drain. Carefully insert the auger into the drain opening and rotate it to break up the blockage.
Wet/Dry Vacuum: If you're comfortable, you can use a wet/dry vacuum to try and suck out the clog. Be very careful and ensure the vacuum is designed for wet use.
Chemical Drain Cleaners: As a last resort, you can try chemical drain cleaners, but use them cautiously. They can damage your pipes and are harmful to the environment. Always follow the manufacturer's instructions carefully. It is usually better to avoid these if possible.
Call a Plumber: If you've tried everything else and the toilet is still clogged, it's time to call a professional plumber. They have the tools and expertise to handle more complex clogs.