We are sorry to hear about your free flow issues. We have hundreds of SR1's being used in these conditions with no problems at all. Just the opposite, divers are very impressed with the performance in these conditions as highlighted by Whalesharker above . The free flow situations mentioned above do not occur at a specific temperature or depth. It is not the equipment, it is the adjustment and tuning. All high performance regulators can free flow in these conditions if not adjusted correctly.The SR1 should not be free flowing at these depths or in these temperatures. The free flow is due to tuning or adjustment. Please take your SR1 in to any authorized dealer for inspection and evaluation. If the local dealer cannot solve the issue, they will get it to Sherwood and we will solve it. We are confident all of the regulators above could be adjusted/tuned to where they could perform in these same conditions with zero free flows.