Abstract: A method and system for allocating fluid flow draining from a fluid utilizing apparatus to first and second fluid sinks. The fluid flow is entirely routed to the first fluid sink for drain flow rates less than a predetermined flow rate and to the second fluid sink as well as the first fluid sink for drain flow rates at least as great as the predetermined flow rate. Fluid from the fluid utilizing device is received in a drain tank through an inlet port and is drained therefrom through an outlet port. The fluid flow rate through the outlet port is regulated by cooperatively modulating first and second valves arranged in parallel flow relation to allocate fluid flow to the first and second fluid sinks.