Gallon Wham – Septic & Drain CleanerWham Gallon is a heavy duty, professional grade cleaner designed to keep septic tanks, cesspools, grease traps, dry wells, drains, and sewer lines clear and flowing. Its non acid, non caustic formula will not harm digestive bacteria, making it safe for long term septic system maintenance. Ideal for residential and commercial use when larger volume treatment is needed. Gallon size (1 Gallon) Cleans and clears septic tanks, cesspools, grease traps, dry