: Pour the solution directly into the drain and leave it for 20–30 minutes to dissolve the blockage.
Caustic soda (sodium hydroxide) is a powerful, highly corrosive chemical used to clear severe blockages in outside drains by dissolving organic matter like grease, fat, and hair. While effective as a temporary fix, it carries significant risks of damaging pipes and causing severe chemical burns. caustic soda for outside drains
For liquid caustic soda (20–30% solution), pour 500ml directly, wait 30 min, then flush. : Pour the solution directly into the drain
Caustic soda is highly corrosive . It can cause severe chemical burns to skin and eyes, and the reaction with water generates significant heat. For liquid caustic soda (20–30% solution), pour 500ml
If you choose to use caustic soda on an outside drain, have a garden hose ready with cold water, keep pets/people indoors for 2 hours, and neutralize any spill with vinegar immediately. Better yet, call a plumber – the cost of one chemical burn emergency room visit far exceeds a service call.