ChemEco Bio Drain Maintainer 5LtrThis drain maintainer from ChemEco is an exceptional grease and fat degrader, keeping drains and pipes and grease traps free from blockages and malodour. Thanks to its powerful formula, the drain maintainer enhances non mains drainage systems such as septic tanks, sewage works and reed beds maximising efficiency. And as it's made from 100% naturally derived ingredients, it's kinder to the environment than harsh alternatives.