<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Hi Howie,<div>I\u2019ve had this same quandary when working with some specialty Pv-powered solar thermal projects. I really like the Laing pumps but they are very expensive and the D5 Solar version can be hard to get. </div><div><br></div><div>Recently I\u2019ve tried the Chinese-made Topsflo DC pumps and despite some initial skepticism, have been pleasantly surprised at how well they have worked. A major plus for retrofit/replacement is that the Topsflo TD5 uses a volute that is essentially a clone of the El-Sid pump body-albeit in stainless rather than bronze. I have to say that I haven\u2019t actually tried a retrofit using the Topsflo motor with an El-Sid pump body and impeller, but I suspect that it will work. At the very least the pump body is a perfect replacement for pipework set up for El-SIDS. </div><div>I have a Topsflo TD5 working in a PV-powered hot-tub heater setup that has been working daily for almost 4 years now with no issues, so the quality seems pretty decent.</div><div><br></div><div><br><br><div dir="ltr"><div><span style="background-color: rgba(255, 255, 255, 0);">Luke Christy</span></div><div>Renewable energy consultant</div><div><br></div><span style="background-color: rgba(255, 255, 255, 0);">NABCEP Certified PV Installation Professional\u2122: </span><div><span style="background-color: rgba(255, 255, 255, 0);"><br>Solar Gain Services, LLC<br>PO Box 531<br>Monte Vista, CO 81144<br>sgsrenewables@gmail.com<br>719.588.3044<br><br></span></div></div><div dir="ltr"><br><blockquote type="cite">On Sep 14, 2020, at 21:49, Howie Michaelson <Howie.Michaelson@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Hi All,</div><div class="gmail_default" style="font-family:verdana,sans-serif">I need to replace 3-5 El Sid pumps I'm using in a low volume hydronic heating system. Other than laing pumps, are there any recommendations for 12, 24, or 48 vDC pumps? Having magnetic drives that mate with the impeller body of the El Sids, would be a bonus.</div><div class="gmail_default" style="font-family:verdana,sans-serif">Thanks,</div><div class="gmail_default" style="font-family:verdana,sans-serif">Howie<br clear="all"></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span><span><font color="#888888"><span style="color:rgb(120,63,4)"><b>Howie Michaelson<br></b></span><span style="color:rgb(0,0,255)"></span></font></span></span><span><span><span><span><font color="#888888"><span style="color:rgb(106,168,79)"><b>Sun Catcher</b></span><br><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><font size="2">
<span style="color:rgb(32,18,77)"><b><span></span></b></span></font></span></span></font></span><span><font color="#888888"><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><font size="2"><span style="color:rgb(32,18,77)"><b><span><span><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"></span></span></span></span></b></span></font></span></span></font></span></span></span></span><span><span><font color="#888888"><span style="color:rgb(0,0,255)"><b><font size="1"><i>NABCEP Certified Solar PV Installer\u2122<br></i></font></b></span></font></span><span><span><font color="#888888"><span style="color:rgb(120,63,4)"></span></font></span></span></span><span><span><span><font color="#888888"><span style="color:rgb(120,63,4)"><b><img src="https://drive.google.com/uc?id=1MQF8aTcFNnBR59ia5JAm1DsPHCxzNkPx&export=download" data-unique-identifier=""><br></b></span></font></span></span><span><font color="#888888"><span style="color:rgb(0,0,255)"><b><font size="1"><i></i></font></b></span></font></span><span><font color="#888888"><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><font size="2"><span style="color:rgb(32,18,77)"><b><span><span><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><font size="2">Solar Electric Systems Sales & Service<br></font></span></span><span style="color:rgb(180,95,6)">802-272-0004</span></span></span></b></span></font></span></span></font></span></span></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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