The Mack truck handles most Nassau pours fine. Here's the job profile that makes a pump worth the add-on.
The Mack International concrete truck handles most Nassau pours without a pump — it drives to the site, positions, chutes into the form. But when the pour is more than 15 feet from where the truck can park, or when site access, grade changes, or structure height makes direct chuting impossible, a pump cuts your pour time by 40–60%.
The Mayco ST 45 and Putzmeister TK 50 both reach 40–50 feet from their positioning point. They charge by the cubic yard ($2–3/yd depending on the model) plus the hourly rate. On large pours, the speed gain alone justifies the cost before you factor in concrete staying workable.
Spec a pump when: the pour is on a second floor or elevated slab; walls or columns block direct truck access; your lot lines prevent the truck from getting close; or you're pouring more than 30 yards and speed is critical. For smaller ground-level residential slabs with open site access, the chute is usually faster and cheaper.