heater hoses

i have a pin leak on the left side of the engine (looking at the enginet) in the heater line that comes off of the water pump branches into a "Y" an (alummnin tube) going around the engine. what is the name of the "Y" tube.

you might want to review this thread and see if the info contained in it applies to your Windstar's problem.

http://www.automotiveforums.com/vbulletin/showthread.php?t=939141&highlight=tube