TERA PUMP 2 Extenstion Tubes for 2-3 Gallon Water Bottle for Dolphin Drinking Water Pumps Original Dolphin Brand Manual Water Pump. Don't be fooled by lesser quailty imitations. Fits most any 5 Gallon Bottles Vacuum Action. Dispense as quickly or a slowly as you like No batteries required / Cleaning Kit provided. Model No. 8080 Does NOT fit: AmericanMaid 5 Gallon BPA FREE plastic water bottles with 53mm caps