Description The Morrison Bros. M100-0100 AVAS 4-Way Reversing Valve is used to simplify the filling and emptying of waste oil containers on lube trucks or for transferring fluids from bulk supply to other tanks. Key Features Unrestricted flow Simplifies installations by eliminating the need for multiple valves Two positions—fill tank or empty tank—for easy operation Four threaded (5/16″) mounting holes for flush mount installation 100 PSI maximum working pressure