Need Quick Help! Pressure Washer and Hose Problem

[Michael01 2]

I bought a brand spanking new Simpson 4,200 psi / 4 gallon Unit, with the Cat Pump and Honda Engine. I rushed home excited to hear her purr for the first time. Set everything up, oil, handle, unwound the pressure washer hose, hooked it up. Started it, and not even one second later the whole "Monster Hose" blew apart on the gun end as soon as I started it. I tried to put a barb fitting in there, clamp it down, obviously with no luck, as it blows right off. 

What would cause this hose to blow apart within one second of starting on the first use ever? Yes, the hose was unwound, no kinks, etc.  Also, should I call them and demand them send out another hose after spending this much on this machine? Personally, I feel like they should up-grade to a heavier duty hose free of charge, as I really needed this unit to clean up my property this weekend on my time off and it's caused a major inconvenience. 

[Beth n Rod 1,279]

I would put a set of gauges on the end of one hose you know has no problems.
One before the gun, the other after with a tip loaded.
Start the unit with the trigger depressed and watch the pressure that registers past the gun.

The unloader may need to be adjusted.
 

Rod.

[Rick2 42]

Yup, I agree.  The unloader would be my first guess.