Why do regs leak?

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I have the apex ctx 50 (same as atx 50) and have the same issue. Right now I am diving in freshwater so it isn't a big deal, but when I finally get into salt water I expect it will be really irritating. I get more than a few drops coming in when inverted. "Small trickle" is a pretty good description.
 
(what else is new right)

What you are describing as a small trickle doesn't sound like it could be caused by the signario pt40fathoms is talking about. Are you saying that if you are breathing normally, face down with no water leaking in and then you hold your breath and roll on to your back that water will trickle into your reg. If the water is able to come in even when your aren't breathing (what I would thing of as a trickle) that doesn't sound good.
 
If anything, ANYTHING, gets into the exhaust valves while you remove and replace your reg under water, you will experience the trickle, and will REALLY notice it while inverted. Usually a violent wave of the reg in the water will displace the trash... (yes, I am advocating violence here). If it doesn't, then while on the surface carefully clean the exhaust valves and make sure they are seating. Sand, hair whatever it is, it really doesn't take much to disrupt that seal.

Oh yeah... clean your pool! :tease:
 
Well not haveing tried your reg in this situation, I would not know if it is a normal event, or if you have a defective valve, or an obstruction in the valve seating area.

NetDoc may be right with the pool trash though. It doesn't take much for the valve to leak when under pressure. A piece of lint or eyelash hair is all it takes. This leak would be more noticable when at deaper depths though.

I often hang inverted, or am on my back for short periods of time (5 - 10 min) when working. Every reg I have tried leaks in that position to some extent. When on my back, it flows right into my mouth. Lucky for me it's always fresh pottable water I'm working in. If I exhale slowly when on my back, the water comeing in does seem to increase, this is only because I am not exhaling with enough force to drive the water out with the air. Remember, when you are on your back, the weight of the water is resting on the valve, when it opens for you to exhale, the water is very eager to get in and does. When you are face down, the water will stay pooled on the valve area.

Have you reg checked out at your LDS. If it gets a clean bill of health, try a little experiment when lying on your back. Try exhaling slowly, and hard, and try to note the difference in the amount of water that leaks in. One other experiment you can try, is to lay face down, and inhale very very slowly after a hard exhale. After you inhale, role on you back, and see if any water entered during your inhale. If you feel that a sizeable amount of water did enter, then you most definately have a problem with the exhast valve and need ot get it serviced. Finally, please do not try this in open water without a buddy with you who knows exactly what you are doing. It would be dangerous alone, and would freek out your buddy when you started to "goof around" under water. Take your time, and soon you will know what to expect from you equipment.
 
I am pretty sure that I only get the trickle on an inhale, I will try out what has been suggested and report back.
 
that could be a small hole in the intake diaphram rather than an exhaust diaphram problem. Again, the amount of the leak may be small enough that in normal positions it just cycles on out without you noticing it. You might want to open the front cover and take a good took at the main (intake) diaphram. If you also remove that diaphram, you should be able to see the inside of the exhaust diaphram in the lower half of the case and see any obvious defect there.
 

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