Chassis Heaters hose

[Jay Darst]

Does anyone know what inside diameter hose is used to supply engine
coolant/water/antifreeze to the chassis heaters in our Birds?

Is there a quality of hose that is considered to be the "best"?

I have heard talk of a silicone impregnated hose...but have not been
able to find true life experiences with it.

Has anyone replaced ALL of these hoses? Am considering replacing ALL
of these hoses. I'm sure it will be a really big job. Just don't wanto
to be fixing them in the wrong place at the wrong time or 1 today
another tomorrow, etc.

Thanks in advance
Jay Darst
85PT40
Springfield, IL