Fluid flow connector

In an outdoor air conditioning condensing unit having a wraparound condenser and a top mounted fan to draw ambient air through the condenser in combination with an externally mounted evaporative cooling system to spray water on the condenser to increase the rate of heat transfer, said evaporative cooling system comprising a tubular manifold encircling the base of the condensing unit coextensive with the wraparound condenser, said manifold having an inlet connected to a source of water pressure, a plurality of vertically extending pipes in fluid communication with said manifold and spaced along the manifold to overlie the condenser for its peripheral extent, each vertical pipe being provided with at least one spray nozzle, said vertical pipes being divided into a number of spray stages with each spray stage comprising at least one vertical pipe, an electrically controlled solenoid valve mounted in fluid control relationship in said manifold at the inlet of each said spray stages, a plurality of thermal switches arranged around the condenser internally of the condensing unit at locations to sense the temperature of the air leaving the condenser at the respective spray stage locations, each thermal switch being set at a different but increasing temperature setting, each thermal switch being electrically connected with a manifold solenoid valve associated with its respective spray stage whereby a modulated spray pattern is generated across said condenser as a function of condenser discharge air temperature.