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Oceanic Delta 4 Info?
Mariner1 - 7/23/2009 8:27 PM
Category: Equipment
Replies: 4

I purchased a once used Delta 4 regulator from a close friend who purchased it new for his daughter, who later they found out was allergic to diving. Or just breathing under water. I’m newer to diving but I did my due diligence and read all the reviews and it seemed like it was a good fit and would grow with me as my skills advanced. I’ve dove 8 times with it and I really enjoy it. Backing up, I also purchased the Oceanic FDX10 w/DVT as part of the package. My question is, I did not get the manual. My friend could not find it. Before I dove my 1st dive I brought it to my local dive shop and it tested great. It was new, so I pretty much bet it would. While diving salt water in depths from 20’ to 40’ I twist at the air adjustment valve on the left side and switch and toggle the top venture (?) lever to the left and right. I really don’t feel any breathing difference. I have a Nitrox (yes I read 40%) class in August. I also have a deep diver training class in September. I’m sure there is a factory setting for the regulator. The only issue I’ve ever had is while snorkling back to a boat or shore the regulator while down by my side will "freeflow" every once in a while. I flip it over and it stops. My opinion is this is a good thing. Air is pretty important. I just would like to set the factory pre sets properly and know how the two adjustments work. I’ve been to the Oceanic site. They have a generic regulator manual. It states on the Delta 3 the top switch should be to the right pre dive, and the air adjustment valve should be all the way counter clock wise then clock wise a 1/2 turn to full turn. Is that correct?

HatchLake - 7/24/2009 7:36 AM
I suggest you take to a dive shop that can service that make and model of reg. I would not attempt to adjust anything on my own reg that is not intended for consumer adjustment. As you mentioned air is important. It would be a sad state of affair if your own tinkering caused a malfunction at any depth that would cause you to do an emergency ascent. A shop that sells that brand of regs can probably get you a manual. 
Mariner1 - 7/24/2009 8:43 AM

Thanks. Good advise. I know a local shop the services Oceanic. The two adjustments are operator adjustments. One’s on the side to adjust the air flow (clockwise/counter?) and the second is a lever. Both can be operated with dive gloves on. But, it’s probably best to go to the source and get the proper info.

LatitudeAdjustment - 7/24/2009 8:48 AM

The owners guide is available as a PDF file at

If you are looking for a repair manual, good luck! There are some for other makes at but not yours.

Best bet is to take an equipment class with the LDS that services your regs. I took mine to class and got to take apart my Omega and Delta which is good if you fill them up with sand on beach dives like I have but I would never attempt to service my own life support equipment. Could I practice on your’s? :)
luke74 - 1/23/2010 3:43 PM
I have service manuals available for download for both the Oceanic FDX10 and the Delta4 on my website under the equipment section. Hundreds of other service manuals on there as well!