Check the listing for details. MID-WEST Model 830 RP Valve Test Kit Backflow Prevention Tester Gauge Set. Condition: Used, Made in United States. Listed at 250.00 USD. For sale is a MID-WEST Model 830 RP Valve Test Kit, used for testing Reduced Pressure (RP) backflow prevention devices. This is a professional backflow testing kit commonly used by plumbers, irrigation technicians, and water system inspectors. The kit includes the gauge assembly, valves, hoses, and original schematic diagram inside the case. Features: • MID-WEST Model 830 Test Kit • 0–15 PSID gauge • High (red), Low (green), and Vent (black) test valves • Bleed high / bleed low controls • Designed for RP backflow prevention device testing • Durable carry case with schematic diagram inside lid Included: • Test gauge assembly • Hoses (red, green, black) • Carry case • Everything shown in the photos