If the blockage is caused by a solid object (toy, jewelry) or mineral scale (limescale), caustic soda will be ineffective. In cases where the procedure fails to clear the drain, a professional plumber should be consulted to utilize a drain snake or hydro-jet.
– Open windows, turn on exhaust fans. Fumes can burn lungs. how to unblock drains with caustic soda
Before handling caustic soda, you must prioritize your safety to prevent severe injury: How to Unblock an Outside Drain - Wolseley If the blockage is caused by a solid
– Add caustic to water, never water to caustic. jewelry) or mineral scale (limescale)