[Tx Firefighter]

If you use a newer box and have issues with the hoses, there is a simple solution. The earlier boxes and pumps used flare fittings on the lines. The later ones used o-ring fittings.

If you run into a mismatch by running different year stuff, you can simply replace the 1 inch fitting in the back of your pump to match the box and hoses. Just screw a later model one into your early pump and you're now matching.