73diver
Contributor
I have a 109 that I sent it to Scubapro to upgrade to a balanced adjustable. Upon using the regulator, I noticed that the breathing effort would change during the dive. It has never been what I would characterize as dangerous. In some cases with rapid or full inhalation the valve would open quite a bit and allow 'lots' of air to flow. At other times it felt as though the adjustment know was turned all the way in. After a year, I sent the regulator in for inspection/rebuild and mentioned the issue. After service the high air flow is gone but at times the resistance seems high and a couple of breaths later is is perfect. The technician reported that the breathing resistance was within specifications; but I suspect that the regulator was not malfunctioning in the high-resistance mode. Adjusting the knob does not seem to help much. I also have an S600 that breathes with comfortable effort whether the adjustment knob is in dive or pre-dive, regardless of inhalation rate. Any ideas what I should tell the technician next?
Last edited: