Stenner Peristaltic

Automatic degassing
Self-priming against pressure
Can prime up to 25 feet
No check valves in head
Can mount in any position
Interchangeable outputs with tube change

Diaphragm

Requires optional degassing valve
Must manually prime
Primes 3 to 5 feet
Check valves prone to failure
Must change head direction
Must change drive and/or head