Roetech Liquid Main Line Cleaner 64 oz. (Pack of 3)Sewer lines and main lines can build up solids which can cause back ups resulting in unpleasant odors, fines and loss of customer sales. Roetech Main Line Cleaner has been designed to clean main sewer pipes of grease, fats, sludge and paper without the use of harsh, aggressive or dangerous chemicals. Formulated with exclusive Roetech bacterial cultures, regular use of MLC will keep sewer pipes free flowing and can help to control problematic drain