The Third Lung 275, 325 and the 460 look a lot alike. What are the differences?
The 275, 325 and the 460 Direct Drive Third Lungs use different compressors and/or engines and have differing number of diver sets. (A set is the maximum number of divers that can descend to the deepest operating depth.) The 275-DD is a single piston system on a 2.5 hp Honda that can support 2 divers from 45 to 75 feet. Its main advantage is that it’s only 32 pounds– about the same weight as a single tank SCUBA rig. If the divers must carry a system over a great distance to get to their entry point, the 275-DD would be very attractive. The more active hooka diver would be well advised to select the 4.0 hp Honda offered with the 325-DD. The 275-DD’s 2.5 hp Honda engine is working at full capacity during a dive. A complete overhaul can be anticipated after 200 to 300 hours of operation. For many recreational divers, this number represents years of use; to some, a single season. The 325-DD has the same single piston system that the 275-DD has but is mounted on a 4 hp Honda engine. Like t
