Been in Storage. This is why price is lower. The MID-WEST 890 Test Kit Double Check Valve is a reliable backflow prevention assembly designed to ensure the safety of your plumbing system. This unit, provided by the trusted brand MID-WEST, includes a double check valve to effectively prevent backflow and protect against potential leaks or contamination. Ideal for use in various industrial and commercial settings, this test kit is a valuable addition to any plumbing system requiring secure and efficient backflow prevention.