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My pleasure - but I also wondered if you might not have a thermal
expansion tank in your system? Perhaps you could also try one of the
Watts Valve commercial valves like the LL40XL. As I recall, these
valves have another type of seat that isn't as prone to gumming up like
the regular residential variety.<br>
<br>
Cheers,<br>
<br>
Matt<br>
<br>
Roy Butler wrote:
<blockquote cite="mid4919DE0D.5080608@four-winds-energy.com" type="cite">
  <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
Matt,<br>
  <br>
Good suggestion.....real hard water here. My water coil needs cleaning
twice each heating season....a royal PITA.<br>
  <br>
In addition to the weeping, the P/T valves also start leaking around
the valve post too,<br>
so I figure I'm better off replacing it anyway.<br>
  <br>
Thanks!<br>
  <br>
  <pre class="moz-signature" cols="72">Roy Butler
NABCEP Certified Solar PV Installer®
NYSERDA eligible PV & wind installer 
Four Winds Renewable Energy, LLC
8902 Route 46
Arkport, NY 14807
607-324-9747

<a class="moz-txt-link-abbreviated"
 href="http://www.four-winds-energy.com">www.four-winds-energy.com</a>
<a class="moz-txt-link-abbreviated"
 href="http://www.nationalsolarsupply.com">www.nationalsolarsupply.com</a>

Although no trees were killed in the sending of this message, 
a large number of electrons were terribly inconvenienced.

  </pre>
  <br>
  <br>
Matt Tritt wrote:
  <blockquote cite="mid:4919D86E.7070706@charter.net" type="cite">
    <meta content="text/html;charset=ISO-8859-1"
 http-equiv="Content-Type">
Hey Roy,<br>
    <br>
T&P valves leak after X amount of time in direct proportion to the
mineral content of your water supply. Minerals are deposited on the
seat surfaces and prevent complete closure. My hunch is that
installations in areas with very low mineral saturation of the water
source will have much longer periods of time between
leaks/seeps/dribbles and oozing. Maybe you can fix these valves by
immersing them in a vinegar bath for a day or so instead of replacing
them?? O course you would have to have the valve open for this to work,
so maybe the vinegar would have to be boiling!<br>
    <br>
Matt<br>
    <br>
Roy Butler wrote:
    <blockquote cite="mid4919AF9F.3090501@four-winds-energy.com"
 type="cite">
      <meta content="text/html;charset=ISO-2022-JP"
 http-equiv="Content-Type">
Hi guys,<br>
      <br>
I have been using the SS water loop in my Amish wood cookstove<br>
for my domestic hot water for 9 years now. My tank is a 40 gallon <br>
electric water heater (space saver unit) and is configured for thermo <br>
siphon operation.<br>
      <br>
The P/T valve is all I have for protection and I have to be honest, <br>
I kind of knew this was probably not a great idea right from the start!<br>
      <br>
But it works....the valve opens up and discharges into a piping system<br>
located under a raised bed planting area in our attached green house.<br>
So we get the benefit of the 'waste' heat. The valve opens, on average,<br>
about 1 or 2 times a week during the coldest part of the winter.<br>
      <br>
I replace the P/T valve every other heating season because it does<br>
begin to weep a bit. So that may be what's saved my ignorant butt<br>
from being blown to bits.....maybe.<br>
      <br>
My question....is there a more robust version of that P/T valve<br>
that I should be using? Something that you would use in a boiler
perhaps?<br>
      <br>
I'm hoping to not have to change the system too much....I love the <br>
long, guilt free showers....more so because the electricity for the<br>
pump comes from my off-grid hybrid system.<br>
      <br>
I'm so much better at PV and wind systems....hot water scares me!<br>
      <br>
      <pre class="moz-signature" cols="72">Roy Butler
NABCEP Certified Solar PV Installer®
NYSERDA eligible PV & wind installer 
Four Winds Renewable Energy, LLC
8902 Route 46
Arkport, NY 14807
607-324-9747

<a moz-do-not-send="true" class="moz-txt-link-abbreviated"
 href="http://www.four-winds-energy.com">www.four-winds-energy.com</a>
<a moz-do-not-send="true" class="moz-txt-link-abbreviated"
 href="http://www.nationalsolarsupply.com">www.nationalsolarsupply.com</a>

Although no trees were killed in the sending of this message, 
a large number of electrons were terribly inconvenienced.

  </pre>
      <br>
      <br>
Todd Cory wrote:
      <blockquote cite="mid:4919AB65.8030603@finestplanet.com"
 type="cite">
        <meta content="text/html;charset=ISO-2022-JP"
 http-equiv="Content-Type">
        <font size="+1"><font face="Arial">Sure, but the discussion was
about
preventing hot water storage tanks from exploding. Putting BTUs into a
tank, whether that  be from a wood stove loop or 5 kW electric heating
element is not the issue. Relying on a P/T valve to regulate
overheating is of course not a good idea, but it will prevent the tank
from exploding.<br>
        <br>
Todd<br>
        <br>
        <br>
        </font></font><br>
Conrad Geyser wrote:
        <blockquote cite="mid6344808BCCA0452F881BBB65C8391134@JRAPP"
 type="cite">
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          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Todd,<o:p></o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">I’m afraid
that any PT valves that I’ve
ever known have continued to weep indefinitely after one or two
overheat
triggers.  <o:p></o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">I would not
recommend relying on them for
heat control devices.<o:p></o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Conrad <o:p></o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">Cotuit Solar<o:p></o:p></span></font></p>
          <p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
 style="font-size: 10pt; font-family: Arial; color: navy;">NABCEP
thermal cert.</span></font></p>
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Internal Virus Database is out of date.
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Internal Virus Database is out of date.
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