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2788. SEARS Captive Air* Tanks are pre-charged at the factory. Check the tank Owners Manual to find if air charge needs adjustment. Model FIGURE 7 390.251483 and Model 390.251883 require 40 pounds for proper operation. OPERATION The jet pump can also be mounted on standard horizontal tanks. A mounting kit with an AVC is furnished with tank. (Figure 6). Priming the Pump Instructions are also included. CAUTION IA j NEVER run pump dry. Running pump without TO SERVICE _ water may overheat unit, dama