The Self-Priming Adaptor (SPA) provides fast self-priming for all standard centrifugal pumps. The patent pending design reduces fill time while protecting the mechanical seal from dry-run. The SPA can be mounted up to 10 feet from the centrifugal pump which allows it to be mounted in tight-fitting configurations while still maintaining priming and flow performance capabilities. The Self-Priming Adaptor is available in 2” NPT and 1-1/2” BSP sizes.