Quote Originally Posted by LogAn'sRun View Post
OK, Can we simplify this just a little. . .(i'm slow sometimes) I get what the reducer is for (ie. to screw into my rad giving me the option to use the thousand varieties of barbs/fittings that are out there like EK/DD/D-tek), but what do you connect with a coupler/nipple?
As the comment in the picture states, the coupler/nipple was used to connect the pump directly to the rad.