Rick,<div>I thought you said that your second stage regulator was lower than your thrusters. How is the water going to get in to them? The exhaust valves on the second stage should keep the water out of the system; however I did add an extension to the exhaust port on mine, just to make sure.</div><div>I have advised at various times to use octopus regulators that are less prone to free flowing.</div><div>One problem I can see is that the exhaust valves may suck open with the water flowing past them while towing. But even if they did, with the thrusters higher than the regulator you shouldn't get any water in.</div><div>However I am building a better over-pressure system.</div><div>Alan<br><br><div id="ymail_android_signature"><a id="ymail_android_signature_link" href="https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature">Sent from Yahoo Mail on Android</a></div> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Wed, 8 Feb 2023 at 11:07 am, Rick Patton via Personal_Submersibles</div><div><personal_submersibles@psubs.org> wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> _______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.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/listinfo.cgi/personal_submersibles</a><br clear="none"> </div> </blockquote></div>