A condensate recovery system is adapted for use with an existing drain. A condensate collection vessel, which may be funnel-shaped, is inserted into the existing drain includes an upper opening to receive condensate and an outer wall. At least a portion of the outer wall is spaced apart from the inner wall of the drain such that if the collection vessel overflows, the excess liquid flows into the drain. A float switch is operative to detect when the vessel has been filled with condensate, and a pump is operative to drain the vessel in response to the float switch detecting that the vessel has been filled with condensate. A time delay relay (TDR) may be activated for a predetermined period of time before shutting off the pump. The output of the pump may be used to replenish an evaporative cooling tower or other purposes.