CALL US DIRECTLY TO ORDER!Pura's nifty Addon-1 is a one gallon/minute system is each designed as a stand-alone UV unit or as a convenient addition to an existing drinking water unit. These are compact, easily installed systems that are trouble free and easy to service. They have no filters to change and require only an annual lamp change. The Add-On units are fitted with John Guest type 3/8" push-in quick connect fittings. Simply push your 3/8" plastic or polypropylene tubing into the fitting for a tight, leak-free seal.ModelPura Add on 1 (UV002)Suggested UsePost purifier for reverse osmosis or other undersink drinking water system. Dental offices. Undersink drinking water purifier.Max Flow Rate1 Gallon per minute (GPM)Replacement Lamp Size #10Lamp Power Usage10 WattsReplacement sleeve #10Height11.5"Cap Diameter3"Tube Connection3/8" Quick Connect