AboutHenry P. Babcock Expertise Technical and repair expert in many different types of equipment and diving physics and physiology. Associate In Science Degree in Recreational SCUBA diving from SBCC Marine Diving Technology program. Several years diving experience. Repair technician for Aqua Lung America (U.S. Divers)
Question Hi, I would like to know about possible failures of first stage. What kind of possible failures may occur? Is free flow from first stage possible?
Thanks & regards
Answer Hakan,
Yes, failure of the first stage resulting in free flow is possible. Some of the causes could include:
The intermediate pressure adjustment may creep higher than manufacturer’s specifications
Foreign matter or sand interfering with the HP seat
Disintegration of HP seat materials
HP seat dirty, damaged, or worn
Crown orifice dirty, damaged, or worn
Failure of internal o-ring(s)
Freeze up due to extreme cold water
Most of these problems can be avoided by proper rinsing and maintenance between dives and regular servicing by an authorized service technician. In the case of extreme cold water problems, use a regulator specifically designed for cold water.
