Unblock Drain With Caustic Soda __top__ Here

| Do | Don’t | |----|-------| | Wear gloves and goggles | Use in aluminum or galvanized pipes | | Use cold water only | Mix with other chemicals (bleach, acid, ammonia) | | Add crystals to water (never water to crystals) | Pour near boiling water after application | | Wait 15–60 minutes | Plunge immediately (risk of splashing) | | Flush with cold water | Leave overnight in old pipes |