Drain Blocked With Caustic Soda ((link)) -

Dealing with a drain blocked by caustic soda or attempting to use it as a cleaner requires extreme caution. Caustic soda (sodium hydroxide) is highly corrosive and can cause permanent eye damage and severe skin burns upon contact. It also generates significant heat when mixed with water, which can damage or warp plastic plumbing.

The chemical reaction is highly exothermic , meaning it creates significant heat. In PVC pipes, this heat can soften or warp the plastic, potentially trapping the blockage even more tightly. How to Fix a Caustic Soda Blockage Reddit·r/askaplumber

For sinks, placing a bucket under the "P-trap" (the U-shaped pipe underneath) and removing it manually allows for the direct removal of the clog. When handling any household chemicals: drain blocked with caustic soda

Help! I’ve Blocked My Drain with Caustic Soda – Now What?

Never mix different drain cleaners, especially bleach and acids, as this can produce toxic gases. Dealing with a drain blocked by caustic soda

Now that the chemical is gone, you need to find the physical object.

Caustic soda is powerful, but it isn't a miracle worker. If you have a drain blocked with caustic soda, the problem isn't the chemical—it's a solid object. The chemical reaction is highly exothermic , meaning

Panic set in. The instructions promised a clear drain. They promised a swirling vortex of satisfaction. Instead, I had a sink full of boiling, toxic sludge that was slowly cooling into a cement-like barrier. I had nuked a clog, only to create a chemical dam.