Home / Appliance / Parts / Captive Air Tank Bladder U20-7 Captive Air Tank Bladder U20-7Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: U20-7 Brand: STA-RITE INDUSTRIES Seller: Sears PartsDirect Categories: Appliance, Parts Possible Matches$239.99Joywhale 24V 2 Seater Kids Ride on UTV Car Powerful Electric Vehicl... Description This bladder (part number U20-7) is for captive air tanks. Bladder U20-7 keeps the air and the water separated in the tank. Follow the instructions in the manual when installing this part.