A Vari-Pak Series reservoir is a variation of the the vertical series reservoirs. This series reservoir has a flat bottom that extends past the reservoir body to serve as the mounting surface of the reservoir. Custom, bolt-on cover configurations are available for mounting the most common system components such as filler breathers and motor adapters. Standard Features: Reservoir capacities ranging from 2 to 25 gallons Channel gasket installed on reservoirs with capacity <= 5 gallons Flat cover plate gasket utilized on reservoirs with capacities > 5 gallons Cover plates are sold separately, refer to Cover Series 4 for available options Reservoir capacities > 5 gallons have an added 6 inch access cover on side surface Reservoir bottom is flat (1) 1/2 inch NPT drain for reservoir capacities <= 5 gallons (plugged) (1) 3/4 inch NPT drain for reservoir capacities > 5 gallons (plugged) 5 inch GT623 Series sight gauge with card thermometer, dual scale 0°F to 220°F and -20°C to 110°C, location varies by reservoir selected Exterior painted with a LDI gray primer Interior coated with rust preventative oil Sight gauge, hardware to mount cover and cover flat gasket (when applicable) provided loose with reservoir Temperature Rating: Industry accepted design practice for hydraulic systems limits maximum operating temperature to 180° F (82° C), but materials used for fabrication of the reservoirs are capable of operating between -40° and 212° F (-40° and 100° C). Caution: Reservoirs are not designed for internal positive or negative pressure applications. For these applications, consult the factory.