Ex-FDMH Mack - unusual pump panel

[GA_Dave]

Don't hold me to this, but I think I know what he is talking about.  First, this one isn't all Mack, just the chassis.  Not sure on the body builder, I see signs of Pierce, but it could be a 3-D or a Darley.  Looking at the pump panel, there are a lot of controls.  I think this rig might have a standard volume pump and a separate high-pressure booster pump, hence the "double pumper" description.