You are correct in your statement that these systems can not produce as much as a hand held RO pump. (The HydroWell can produce as much.)

The beauty with these systems is that they do not require pumping, which is why the Coast Guard has them on their planes. The USCG found that most pilots are disabled during a crash and they can't operate a RO pump in that injured state.

People are purchasing the SeaPack and LifePacks because they are so much less expensive than RO pumps that can handle salt. They also do not require pumping or maintenance.

Rick Feineis
Managing Partner
Manta Ventures, LLC
www.sea-pack.com