<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Peter,<div><br></div><div>There are some hi end units that are really nice.</div><div><br></div><div>Takagi, Rennai are the two that come to mind that are really amazing. They have digital remote controlls and are are designed to mounted outside, which saves a lot of </div><div>interior space, cost of reworking the flue etc.</div><div><br></div><div>Jay</div><div><br></div><div>Peltz power</div><div><div><div>On Dec 7, 2008, at 3:22 PM, Peter Parrish wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div bgcolor="white" lang="EN-US" link="blue" vlink="purple"><div class="Section1"><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; ">We are getting ready to install a SDHW system for a customer and we looked at a number of things regarding his current set up. I just posted a question about tankless heaters but I wanted this query to be a separate one. The customer’s mains water pressure is 88 psi on a Saturday afternoon and some time over the next 18 hours, the pressure went as high as 96 psi. I understand that 80 psi is the high end of the safe range in general and that 96 psi on a regular basis can/will damage valves and possibly trigger T&P valves on water heaters.</span></font></div><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; "> </span></font></p><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; ">At the recommendation of a plumber I know I looked into pressure reducers, specifically the Wilkins/Zurn line. All the Wilkins regulators produce zero pressure drop at zero flow. What good are these products in protecting plumbing systems from high mains pressures at night when pressures tend to be the highest and usage is at a minimum or even zero?</span></font></div><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; "> </span></font></p><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; ">Are there products that will prevent system pressures from exceeding a set point (e.g. 60 psi) under any flow condition including zero? </span></font></div><p class="MsoNormal" style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; "> </span></font></p><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; "><font size="3" color="black" face="Times New Roman"><span style="font-size: 12pt; color: black; ">- Peter</span></font></div><div><p style="margin-right: 0in; margin-left: 0in; font-size: 12pt; font-family: 'Times New Roman'; "><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy; ">Peter T. Parrish, President<br>California Solar Engineering, Inc.<br>820 Cynthia Ave., Los Angeles, CA 90065<br>Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885<br>CA Lic. 854779, NABCEP Cert. 031806-26<br><a href="mailto:peter.parrish@calsolareng.com" style="color: blue; text-decoration: underline; ">peter.parrish@calsolareng.com</a></span></font><font size="2" color="blue" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: blue; "></span></font></p></div></div>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address:<span class="Apple-converted-space"> </span><a href="mailto:RE-wrenches@lists.re-wrenches.org" style="color: blue; text-decoration: underline; ">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" style="color: blue; text-decoration: underline; ">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive:<span class="Apple-converted-space"> </span><a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" style="color: blue; text-decoration: underline; ">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" style="color: blue; text-decoration: underline; ">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org" style="color: blue; text-decoration: underline; ">www.members.re-wrenches.org</a><br><br></div></span></blockquote></div><br></div></body></html>