There are pumps on the market that are self-priming and can run dry indefinitely without doing damage to the pump.
Positive Displacement Pumps - an overview
RCV-250 Dry Running Claw Vacuum Pump
8025-933-299 115VAC, 1.7 GPM, 95 PSI, 3/8 FPT, Shurflo Positive
Rotary Lobe Pump: What Is It and How Does It Work?
Fuel Pump Module for Can-Am Maverick X3 Turbo, can pump
SEAFLO 12v dc low power transfer booster pump for shower
Operating Principle Utilizing Free Disc Technology - Penn Valley
QEEHUA: What is a Mag-drive pumps?
Penn Valley Pump
How Long Can I Run My Pump Dry?
Positive Displacement Pumpcomplete understanding
Lippert 689052 Flow-Max 3.3 GPM 12V 45 PSI 8A Max RV Fresh Water
G Series Positive Displacement Pumps Manufacturer Electric Motor