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PWA-SP, Self- Priming process pump is uniquely designed to provide all in one pump priming and air removal without the need for priming devices such as air separator, check valve or external priming equipment and designed, built and tested in the USA to ANSI and ISO exacting standards, while enhancing the typical design to the next level of reliability. High strength carbon steel liquid end and frame adapter material, additional casing thickness and up graded bearing lubrication for increased bearing life are just a few no charge features considered extra from other manufacturers. Coupled with a fully staffed professional sales and service teams and strategically located inventory throughout the Northern Hemisphere insures consistent, rapid shipment tailored to customer specification requirements.