? Macerator Pump Head Capability

I've never seen a head rating for my Flojet Waste Macerator, only the caution to not pump greater than 25' through a 5/8" hose, 50' through a 3/4" hose over relatively flat terrain, which is what I do when servicing my tanks with the trailer parked here at the house. Since I carry my FJ in the trailer I always have the option when camping of off loading grey and / or macerated black water into containers sitting in the back of my truck and for that I just use a 25' 1/2" diameter hose, no issues at all. I've never tried it but I see no reason my Flojet couldn't just as easily pump through 50' of hose to containers sitting in the truck. Pics are in my gallery.