SCUBAPRO Diaphragm vs. Piston First Stages

To move air from your cylinder to your regulator’s second stage, a first stage uses either a piston system or a diaphragm system. Both can deliver excellent breathing performance; however, each has distinct advantages that are better suited to different diving situations. SCUBAPRO USA’s Technical Manager Rene' Duprè explains.
www.scubapro.co...

[@johnjerrehian4642]

I have had the MK25 regulator for years. Flawless design and always easy clear air to breath.

[@rarler3333]

I earned my cold water diving creds from the comfort of a balmy summer lake. I looked goofy to the water skiers and swimmers in shorts while I was in a hooded wetsuit. At about 50 feet I hit the 4 degree centigrade layer of water that is too deep for surface currents and too dense to rise on its own. My goggles instantly fogged, any exposed skin hurt, I shivered, but I was assured by the factory my piston first stage would not ice up. For a nominal fee, they packed the cavity with low temp grease and held it in with a wrapper. Thanks to your explanation I understand the reason for that extra step.

[@fabiojanuario2856]

Unbelievable professor. I highly recommend going to one of his seminars.

[@Godshelper707]

Excellent instructor, gives seminars around the U.S. Must schedule!

[@PROSTO4Tabal]

more technical videos please !

[@markstengel7680]

Well Done, I prefer a piston design vs diaphragm. Less parts is a big factor for me. Bye

[@wascallywabbit8940]

Thanks Rene! Lets take a dive some time. :-)

[@ts440s]

If they gave a real in depth explanation of both I might buy one. I can understand why they dont have better videos out.

[@JohnVanderbeck]

What is considered "cold" for the purposes of a regulator? Or asked another way, at what temperature and below do you need to start looking at regulators with stated cold water performance?

[@klixtrio7760]

Late reply sorry, but I believe its anything under 10c...however must scubapro regs seem to be good until under 5c.

[@NelsBuhayProbinsya]

Can you pair mk11 with s620ti

[@dennielempoy1076]

cool

[@rdong11]

finally..

[@unisuit]

Scuba Pro must make some poor quality diaphragm regs ;) Every one I've worked on will deliver more air then can be humanly used. Yes, even at depth. So, if one reg will work every where and the other limited, kinda makes your purchase easier.

[@user-br4dt3nu6g]

👋👌💪