VEVOR 30 Gallon Gas Caddy, Fuel Storage Tank with Wheels, Portable Fuel Caddy with Manuel Transfer Pump, Gasoline Diesel Fuel Container for Cars, Lawn Mowers, ATVs, Boats, More, Black

I need to replace the barb fitting on the top of the pump that connects the hose to the pump. Can you provide me with the thread size? NPT, UNF, UNC, metric??? I

Fitting and thread sizes for pump and tank?

How do you fill this at the gas station? When they usually want it on the ground out of a vehicles while filling.

Is this product DOT certified? Is it safe to keep in an enclosed lawn trailer?

What is the dimension from ground to top of pump?