With a unique formula containing natural enzymes, Drano Max Build-Up Remover helps prevent clogs from forming in your pipes. This product helps remove build up but will not unclog your drain. Use it on a monthly basis to keep your drains running smoothly and prevent clogged drains. An ounce of prevention is worth a pound of cure. Container Size (Oz.): 60 Chemical Form: Liquid Commercial / Residential: Commercial For Septic Use: Yes Set Time (Min.): 360 Type of Issue: Drain Prevention Formula: Yes Number of treatments per container: 4 Compatible Pipe Material: Multi-Purpose Drain Cleaners Type: Bathtub, Sink