A concentrated easy to use K-97 is a beneficial product for a variety of plumbing areas. The main line in a home going to either a septic, cesspool or municipal system tends to accumulate sludge that can cause major back-ups in a home. Main Line Cleaner, containing millions of specialized waste degrading bacteria, keeps this major line clear and flowing. K-97 is indispensable in resolving the problems of sludge build-up due to the inefficiencies of "low flow" toilets by keeping the sewer pipe clear. Undersized septic systems have an increased flow rate that can cause many problems in a leach field. By using K-97 on a weekly basis, the retention of waste degrading bacteria increases the efficacy of the smaller, overworked systems