SCAT diameter for defrost

[Indiana_Pilot]

Does anyone know the SCAT duct diameter that is generally used for the defrost for a 66 Cherokee 180? I’m guessing 1 1/4”? That’s what I could measure but it’s hard to get a good measurement on the tube itself or where it connects on the firewall..


Sent from my iPhone using Tapatalk

 

[Paulie]

IPC

 

[Indiana_Pilot]

IPC

IPC? I cannot find what hose/duct to get.. Piper lists it part#
63633-03 but cannot find type anywhere..