Nu-Line A/C Condensate Drain Line Build-Up Remover Is Formulated To Prevent Clogs and Floods By Loosening and Removing Slime and Scum Build-Up In A/C, Refrigeration and Drinking Fountain Condensate Drain Pans, Lines and Pumps. Resists Further Build-Up For Up To 90 Days. Safe, Biodegradable Formula Allows For Easy Handling and Use. Liquid Product In A Squeeze Container Allows For Easy Application In Difficult To Access Condensate Pans and Lines. Completely Clogged Lines Must Be Cleared (Blown Out) Prior To Use.