A: "That is a vertical turbine pump. The discharge line looks to be 6 inches in diameter. The device with the round flanges on the top is a check valve. Check valves only allow liquids to move in one direction. In this case, the way the check valve is oriented on the discharge line prevents any pressurized liquids from going back to the pump. The discharge line has a “T” (tee) shaped fitting where it connects to the other pipe. The tall object on the other pipe to the right of the tee is a 6 inch gate valve with the operating handwheel missing."