With Caustic Soda [cracked]: Drain Blocked

Plumbers need to know this so they don't get burned when they remove your pipes. They have industrial augers (snakes) that will physically pull out whatever is blocking the pipe—something chemicals cannot do.

Use a small cup or a wet/dry vacuum ( rated for liquids ) to remove the neutralized water. Dispose of it down the toilet (lots of flushing water) or outside away from pets. drain blocked with caustic soda

But what happens when the magic doesn’t work? Worse, what happens when the caustic soda seems to have made the blockage worse ? You now have a drain blocked with caustic soda—a dangerous, chemical-filled standstill. Plumbers need to know this so they don't

If the water is just sitting there, you need to lower the pH before you can work. Very slowly add white vinegar or citric acid to the standing water (roughly 1 cup vinegar per gallon of water). It will fizz. Wait 10 minutes. This neutralizes the caustic soda into a salty water solution. Dispose of it down the toilet (lots of