RV plumbing hose size

[jmai]

I have a 2001 Roadtrek 190 Popular (Dodge Chassis)

I need to move my Shurflo water pump and need to know what size Roadtrek used in its plumbing. I know the screw fittings for the pump are 1/2" and the white plastic pipe is secured with a pinch type clamp. I assume it is PEX hose with a barbed fitting.

What is the Inside Diameter of the hose (from pump inlet and pump outlet) used in these models?

Thanks in advance