- Reaction score
- # of dives
- 1000 - 2499
Orifices can and eventually will clog. The tiniest drop of water anywhere upstream will lead to corrosion, the brass orifice wants to corrode and turn green pretty badly. It only takes one tiny tiny salt crystal to cause a problem.
The Revo MAV is the worst as you can't get the actual orifice out of the block to clean it. Your smaller orifice is actually more likely to clog than the standard 0.035" one. Just because it hasn't happened to you yet does not mean it doesnt happen. This is one reason why needle valves are increasing popular, they are basically impossible to clog.
I think I've had my KISS orifice clog before, at least partially. I was getting reduced flow after about 5 days of diving on a cold water trip, and had to manually add O2 more than usual. I serviced the MAV and cleaned the orifice in an ultrasonic. It was good as new after that.
That's one time in about 13 years and probably 1,500 dives on our two KISS units.