Versamatic’s 1 ½” (38mm) air-operated double-diaphragm (AODD) pump features a classic clamped design, ensuring both reliability and portability. It is dimensionally interchangeable with the Wilden 4 Clamped Series. Self-priming and available in various materials, this AODD pump offers: - Rigid and durable construction - A range of material options for different applications - Submersible and portable design - Non-freezing and non-stalling operation - Consistent on/off reliability Versamatic AODD pumps can effectively handle a wide variety of fluid types, from water to viscous or abrasive products.