Nu-Line is the Industry Standard in A/C Condensate Drain CleanersItem Specifications: Nu-Line provides cleaning action for soil and build up and water deposits in air conditioner and refrigeration drain lines , pans and condensate pumps. Also for ice machines , drinking fountains and soft drink machine drain pans and lines. SAME PROVEN FORMULA...Brand New Packaging! Additional Information:The Date Code on the Bottle is a Package Date - NOT an Expiration Date , kept closed , there is no ExpirationNL1 - 8 Fluid Oz. Bottle (237 mL) Helps Prevent Clogs and Water Leaks in A/C Drain Lines Helps to Remove Build-Up in Drain Lines 8 Fluid Oz. Bottle Treats up to a 4 Ton UnitDirections for Use:Shut of air conditioner , Pour 8 fluid oz. into drain pan , drain line or condensate pump. Restart system after 20 minutes. Repeat this process every 90 days. ** NOTE: Completely clogged drain lines must be cleared prior to use. **Replaces / Supersedes:NuLine , Nu Line , Nu-Line , NL2 , NL-2 , AC Line WACL32 , 021449976909 and Similar Drain Line Products.Additional Drain Pan Treatments and Condensate Products AvailableNote : Images are for illustration only. Actual item may vary.