The Drain Field Cleaner System is derived from our commercial products developed for clearing organic sludge and clogs in municipal wastewater treatment and agricultural (livestock) lagoons. Includes 20 "FS66" Commercial-Strength Tablets 10 Months of Stay-Clean Maintenance Easy To Use: Just Flush Clears Drain Fields to Get Them Flowing Again Clears Your Tank & Pipes of Organic Solids Safe for All Systems, Including Older Iron & Ceramic Pipes Works for Aerobic & Anaerobic Systems Works in Traditional Drain Fields AND Spray Irrigation Systems Eliminates the Production of Odors & Harmful H2S Gas Totally Safe & Non-toxic (for pets, kids, yard, etc) Great for Rejuvenating Old Septic Systems The formula is designed to clean millions of gallons in highly dynamic systems so rest assured that it works in septic systems. No Risk. Guaranteed to Work or Your Money Back.Free Shipping on All Orders