Little Heat from Heater during idle

[j4rowell]

I've seen this issue on an old thread but not sure where. During idle I have less heat coming from my system. Obviously this makes sense, but what are you guys doing to fix this? Heatercraft recommended this Y-Fitting...

http://www.heatercraft.com/ProductIn...productid=H424

Has anyone done this? If so where exactly does it go? Thanks in advance.