I was using my regs in the pool (SP Mk10 w/ R109s adjustables) and I noticed that if I breathe very hard/quickly off one of the 109s it seems to close up an refuse to give air as fast as if I breathe slowly. This isn't the case on the other 109. The 109 that I'm having problems with has a brand new poppet, seat, o-rings and a new plastic orifice. The other 109 has a new (ok, flipped) seat and o-rings, but still has the original metal orifice. What is this problem likely to be caused by? My initial inclination is that something on the diaphragm is unhappy.
Additionally, the Mk10 whines pretty loudly when I breathe hard or inflate. Is this a sign of problems?
Additionally, the Mk10 whines pretty loudly when I breathe hard or inflate. Is this a sign of problems?