The PREY Suction Hose Test Injector—SPI for short—consists of a vacuum injector with a swivel C-connector, a 0.8-meter-long vacuum spiral hose with an A-blind coupling, a pressure-vacuum gauge, two precision bronze ball valves, an A-type blind coupling with a bleed valve for pressure testing, and a round, precisely fitted Makrolon clear glass pane for internal illumination and visual inspection. The piping is made of stainless steel.