|"Y" tube is designed to be used with the Homebuilders cabin heat box to make warm air available to 2 or more locations in the aircraft. Constructed of seamless 2024T6 tube, it weighs only 2 oz. These tubes are expanded to 2" I.D. on the inlet end to slip over and clamp to the 2" O.D. tube of the cabin heat box. Due to the very light weight, "Y" tubes can be installed in scat tubing as well as attaching directly to cabin heat boxes. One stainless steel clamp is included with "Y" tube. Due to the light weight of only 1.7 oz., the non-expanded Y-tube can be placed anywhere in a run of tubing to give more options for heating additional areas of the aircraft.|
Amazing value for the money. The weld quality is good. Though I understand why (risk of weld burn through during manufacturing) there is a lip on the side of the pass through tube where the Y tube attaches, I wish it was a bit more free flowing in that location. You wont have balanced flow between the two ends of the Y unless you restrict the straight through section some. In my case I can use this restriction as an advantage to force extra air to the other side of the aircraft.
The difference between the two is that part # 08-04100 has an expanded end on the inlet side which allows it to fit over a 2" OD diameter tube.