Before you begin, you must prepare your safety gear. Caustic soda can cause severe chemical burns if it touches your skin or eyes.
Carefully pour the solution directly down the blocked drain. Do not let it splash. Once poured, leave it to work.
Caustic Soda Drain Cleaning
After the waiting period, flush the drain with hot water. Turn on the tap and let the water run for several minutes to wash away the dissolved debris and any remaining chemical residue.
| Do | Don’t | |----|-------| | Wear | Use with aluminum (causes explosive hydrogen gas) | | Add caustic soda to water (never water to caustic) | Inhale dust or fumes | | Work in a ventilated area | Use in standing water (can boil violently) | | Keep vinegar or boric acid nearby for spills | Mix with acid or ammonia (toxic fumes) |
| Use | Frequency | |------|------------| | Weekly: baking soda + hot water | Preventive | | Monthly: 1 tbsp caustic soda + 1 gal water | Light maintenance | | Severe clog: 1 cup caustic soda solution | As needed (max 2x/year) |
While highly effective, it is an aggressive chemical that requires strict safety precautions. Here is how to use it safely and effectively.
