<div dir="ltr">Hi Jon,<div><br></div><div>No, you don't need to use rigid pipe, hose is fine. It's just that the hose should not be connected to the 1st stage HP port if you want flow. Do some searches on "SCUBA whip" and you'll find flexible hose that connects straight to a tank and is suitable for flow.</div><div><br></div><div><br></div><div>Best,</div><div>Alec</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 12, 2018 at 8:27 AM, Jon Wallace 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"><div><div style="color:#000;background-color:#fff;font-family:times new roman,new york,times,serif;font-size:16px"><div id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19866"><span></span></div><div id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19866"><span id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19898">Great info, much appreciated. So rigid pipe it is.</span></div><div class="m_55631334546359784qtdSeparateBR" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19870"><br><br></div><div class="m_55631334546359784yahoo_quoted" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19876" style="display:block"> <div style="font-family:times new roman,new york,times,serif;font-size:16px" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19875"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19874"> <div dir="ltr" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19873"> <font size="2" face="Arial" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19872"><span class=""> <hr size="1" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19871"> <b><span style="font-weight:bold">From:</span></b> Sean T. Stevenson via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>><br> <b><span style="font-weight:bold">To:</span></b> <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a> <br> </span><b><span style="font-weight:bold">Sent:</span></b> Monday, March 12, 2018 8:14 AM<div><div class="h5"><br> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] HP Scuba hose<br> </div></div></font> </div><div><div class="h5"> <div class="m_55631334546359784y_msg_container" id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19899"><br><div id="m_55631334546359784yiv6431388382"><div id="m_55631334546359784yui_3_16_0_ym19_1_1520854769559_19900">Exactly that. Either the male HP hose end fitting, or the HP port on the SCUBA regulator, or both, will have the available flow orifice reduced to a mere pinhole. On a SCUBA regulator, the HP hose is deadheaded. It's intended purpose is simply to pressurize the submersible pressure gauge or transmitter - not to deliver flow. The pinhole restrictions prevent catastrophic gas loss if the HP hose bursts or is severed. In fact, gas loss from a failed low pressure hose is much more significant than on the HP side due to these restrictors.<br clear="none"><br clear="none">Sean<br clear="none"><br clear="none"><br clear="none">-------- Original Message --------<br clear="none">On Mar 12, 2018, 04:59, Jon Wallace via Personal_Submersibles < <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<blockquote class="m_55631334546359784yiv6431388382protonmail_quote"><br clear="none"></blockquote></div><div class="m_55631334546359784yiv6431388382yqt4306575029" id="m_55631334546359784yiv6431388382yqt45223"><div><div style="color:#000;background-color:#fff;font-family:times new roman,new york,times,serif;font-size:16px"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9800"><br clear="none"></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9800">Emile, are you are suggesting that the HP hose won't deliver the volume necessary? A good point, thanks.</div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9800"><br clear="none"></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9800">Jon</div><div class="m_55631334546359784yiv6431388382qtdSeparateBR" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9801"><br clear="none"><br clear="none"></div><div class="m_55631334546359784yiv6431388382yahoo_quoted" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9809" style="display:block"> <div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9808" style="font-family:times new roman,new york,times,serif;font-size:16px"> <div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9807" style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div dir="ltr" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9806"> <font id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9805" size="2" face="Arial"> </font><hr id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9902" size="1"> <b><span style="font-weight:bold">From:</span></b> emile via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>><br clear="none"> <b><span style="font-weight:bold">To:</span></b> 'Personal Submersibles General Discussion' <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> <br clear="none"> <b><span style="font-weight:bold">Sent:</span></b> Sunday, March 11, 2018 3:38 PM<br clear="none"> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] HP Scuba hose<br clear="none"> </div> <div class="m_55631334546359784yiv6431388382y_msg_container" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9961"><br clear="none"><div id="m_55631334546359784yiv6431388382"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9965"><div class="m_55631334546359784yiv6431388382WordSection1" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9964"><div class="m_55631334546359784yiv6431388382MsoNormal"><span lang="EN-US" style="font-size:11.0pt">The HP port has usually a restriction . A safety feature for the case of a Hp hose burst.</span></div><div class="m_55631334546359784yiv6431388382MsoNormal" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9963"><span id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9962" lang="EN-US" style="font-size:11.0pt">Could maybe enlarged.</span></div><div class="m_55631334546359784yiv6431388382MsoNormal"><span lang="EN-US" style="font-size:11.0pt"> </span></div><div class="m_55631334546359784yiv6431388382MsoNormal" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9966"><span lang="EN-US" style="font-size:11.0pt">Br, Emile</span></div><div class="m_55631334546359784yiv6431388382MsoNormal" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9967"><span lang="EN-US" style="font-size:11.0pt"> </span></div><div class="m_55631334546359784yiv6431388382yqt4660556016" id="m_55631334546359784yiv6431388382yqt72741"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9971"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9970" style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div class="m_55631334546359784yiv6431388382MsoNormal" id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9969"><b><span style="font-size:10.0pt">Van:</span></b><span id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520854769559_9968" style="font-size:10.0pt"> Personal_Submersibles [mailto:<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank">personal_submersibles-<wbr>bounces@psubs.org</a>] <b>Namens </b>Jon Wallace via Personal_Submersibles<br clear="none"><b>Verzonden:</b> zondag 11 maart 2018 18:16<br clear="none"><b>Aan:</b> Personal Submersibles General Discussion<br clear="none"><b>Onderwerp:</b> Re: [PSUBS-MAILIST] HP Scuba hose</span></div></div></div><div class="m_55631334546359784yiv6431388382MsoNormal"> </div><div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7517"><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt;color:black">Is there some other way to tap HP off a SCUBA tank other than first stage regulator? I was thinking of running the HP hose to a manifold that would feed the ballast tanks.</span></div></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7550"><div class="m_55631334546359784yiv6431388382MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-size:9.5pt;color:black"> </span></div></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7616"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7615"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7614"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7613"><div align="center" class="m_55631334546359784yiv6431388382MsoNormal" style="text-align:center;background:white"><span style="font-size:10.0pt"></span><hr align="center" size="1" width="100%"></div><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt"> Sean T. Stevenson via Personal_Submersibles <<a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>><br clear="none"><b>To:</b> <a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a> <br clear="none"><b>Sent:</b> Sunday, March 11, 2018 10:54 AM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] HP Scuba hose</span><span style="font-size:9.5pt"></span></div></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7618"><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt"> </span></div><div id="m_55631334546359784yiv6431388382"><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520788350158_7619"><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt">HP SCUBA regulator orifice is 7/16-20 UNF 2B thread. There are Swagelok and other fittings which will work, but watch your wrench clearances when using multiple adjacent ports. On that note, LP SCUBA ports are either 3/8-24 UNF - 2B (most common) or 1/2-20 UNF - 2B (less common). Be aware that while most HP SCUBA SPG hoses have a pinhole bore in order to reduce the consequences of a HP hose failure, some SCUBA regulators incorporate the pinhole restriction into the regulator itself, which will limit the available flow rate at high pressure. Of course, if your drawing gas off at high pressure anyway, why go through the reg?<br clear="none"><br clear="none">Sean<br clear="none"><br clear="none">Sent from ProtonMail mobile<br clear="none"><br clear="none"><br clear="none"><br clear="none">-------- Original Message --------<br clear="none">On Mar 11, 2018, 07:12, Jon Wallace via Personal_Submersibles < <a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:</span></div><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt"> </span></div></div><div id="m_55631334546359784yiv6431388382yqt66975"><div><div><div><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt;color:black"> </span></div></div><div><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt;color:black">Are there adapters that can change a SCUBA HP hose fitting to NPT?</span></div></div><div><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt;color:black"> </span></div></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520777355398_5939"><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt;color:black">Jon</span></div></div><div id="m_55631334546359784yiv6431388382yui_3_16_0_ym19_1_1520777355398_5940"><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt;color:black"> </span></div></div></div></div></div></div><div id="m_55631334546359784yiv6431388382yqt72858"><div class="m_55631334546359784yiv6431388382MsoNormal" style="background:white"><span style="font-size:9.5pt">______________________________<wbr>_________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.<wbr>org</a><br clear="none"><a rel="nofollow" shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a></span></div></div><div class="m_55631334546359784yiv6431388382MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-size:9.5pt"> </span></div></div></div></div></div></div></div></div></div></div><div class="m_55631334546359784yiv6431388382yqt4660556016" id="m_55631334546359784yiv6431388382yqt97344">______________________________<wbr>_________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.<wbr>org</a><br clear="none"><a rel="nofollow" shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a><br clear="none"></div><br clear="none"><br clear="none"></div> </div> </div> </div></div></div></div></div><div class="m_55631334546359784yqt4306575029" id="m_55631334546359784yqt79200">______________________________<wbr>_________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.<wbr>org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a><br clear="none"></div><br><br></div> </div></div></div> </div> </div></div></div><br>______________________________<wbr>_________________<br>
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