<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Hi Rick,</div><div><br></div><div>As always my guiding principle is to use the simplest components I can. In this case it's a little 1st stage made by Piranha Dive Manufacturing. I'd never heard of this little company but their 1st stage was so reasonably priced I ordered one just to see what it was like. Well, I liked it so much I ordered two more. This is advertised only as Nitrox ready for up to 40% O2. However, I spoke to the owner and he said the O rings, lube, and cleaning process are all for 100%, but they just advertise it for 40% as a legal CYA. It's a balanced piston design.</div><div><br></div><div><a href="http://www.piranhadivemfg.com/item/Balance-Piston-Din-First-Stage--For-Pony--Stage-Bottles--Nitrox-Ready-11738">http://www.piranhadivemfg.com/item/Balance-Piston-Din-First-Stage--For-Pony--Stage-Bottles--Nitrox-Ready-11738</a></div><div><br></div><div><br></div><div>Best,</div><div><br></div><div>Alec</div><div><br>On Apr 26, 2017, at 2:51 AM, Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Alec and Brian,<div><br></div><div>Thanks for the response. What type of first stage are you using on the outside tanks and are the balanced or unbalanced?</div><div><br></div><div>Rick</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 25, 2017 at 4:37 PM, Brian Hughes via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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I relocated the twin air tanks outside of Harold with a 50 cf backup inside. O2 is now inside (20 cf tank) with pediatric regulator directly attached. I was uncomfortable running O2 any distance through hoses.
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