mf7lakes
Full Access Member
5/8 worked for me -- all fittings were same size
I'm same way as you Goat on my '90 & '92, 5/8" hoses as well as ball valve on both hoses.Hoses on my 86 are both 5/8".
Also don`t have a restrictor as far as I know.
I do have a manual shut off valve on each hose, so I can shut off the hot water in the summer.
Also good to have incase the Heater Core blows out. Makes a wet mess in the cab.
Goat
Your saying this hose is bigger inside diameter on one side than the other?