Home / Appliance / Parts / Captive Air Tank Bladder U20-9 Captive Air Tank Bladder U20-9Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: U20-9 Brand: STA-RITE INDUSTRIES Seller: Sears PartsDirect Categories: Appliance, Parts Possible Matches$299.9941. New. OEM. Captive air tank bladder U20-9 $239.99Joywhale 24V 2 Seater Kids Ride on UTV Car Powerful Electric Vehicl... Description This bladder (part number U20-9) is for captive air tanks. Bladder U20-9 keeps the air and the water separated in the tank. Follow the instructions in the manual when installing this part.