Home / Appliance / Parts / Captive Air Tank Bladder U20-14 Captive Air Tank Bladder U20-14Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: U20-14 Brand: STA-RITE INDUSTRIES Seller: Sears PartsDirect Categories: Appliance, Parts Possible Matches$139.99Litheli 2x20V 14" Brushless Cordless String Trimmer, Battery Powere... Description This bladder (part number U20-14) is for captive air tanks. Bladder U20-14 keeps the air and the water separated in the tank. Follow the instructions in the manual when installing this part.