Okay, here's another thought or two. Remember when U.S. Divers Company went from the removable exhaust horn and internally mounted duckbill to a solid horn and a duckbill which folded over the exhaust horn. This happened when they went from the DA Aqua Lung regulator to the DA Aquamaster, and also when they went from the DX Overpressure Breathing regulator to the Stream Air/Mistral regulator ulator on the single stage product line. When that happened, there was a problem as the outside diameter of the hose on. The exhalation side would be larger than the inhalation side due to the folded-over duckbill exhaust valve. If they continued to use the original hose clamps, those clamps would no longer fit completely around the exhaust hose/folded duckbill. This would necessitate a shim if those clamps were to continue to be used until a new, better clamp could be designed and produced.
My other thought is that dealers may have started using the copper shim, rather than it being from the factory.
My LDS just receiver a very old DA Aquamaster with rotted yellow hoses. I may take a look and see whether it has those shims.
SeaRat
My other thought is that dealers may have started using the copper shim, rather than it being from the factory.
My LDS just receiver a very old DA Aquamaster with rotted yellow hoses. I may take a look and see whether it has those shims.
SeaRat
