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<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>From Snow country
in CO this is our formula:<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Dig a clean
trench with a flat bottom. Allow for height of insulated package and sufficient
back fill so you do not end up with a dead line of grass across the yard.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Line with 12
mil plastic or heavier,  12 mil poly has a 12,000 year lifespan when not
exposed to UV[ all our garbage is nicely packaged for future archaeologists] . Allow
extra to fold back over side  to side and be able to overlap..<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Lay 2x4 blocks
on edge every 3-4 feet, for temporary pipe support till the foam sets up.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Install either
soft or hard copper pipe [never use PEX or any kind of plastic] and silver
solder [only no regular solder] and then pressure check for 24 to 48 hours. We
install a ½” electrical PVC conduit to run sensor wire through too so you
can change it out if there is ever a problem.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Spray foam
under over and around to achieve a minimum 4-5” coverage on all sides. We
have used commercial spray operations and the 5 gallon / 2 part do-it-yourself
commercial spray foam [Versi-foam] there are others out there too. Allow foam
to cure to hard before next step.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Fold plastic
back over. Back fill carefully do not puncture plastic; if rocky soil cover plastic
with scrap card board, old carpet, or newsprint to temporarily protect the plastic
during backfill. Water will wick heat away as fast or faster than exposed pipe.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>We have 200’
runs that do not loose even1 deg. F end to end.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>There are a
lot of commercial products out there but this works great, is relatively inexpensive,
and to date never had a failure.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Enjoy -<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>Dana
Orzel<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>Great
Solar Works, Inc<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>www.solarwork.com<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>E
- dana@solarwork.com<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>V
- 970.626.5253<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>F
- 970.626.4140<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>C
- 970.209.4076<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#4F81BD'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>I
will be the shift in how the world uses power! - Dana Orzel<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>

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<p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Nicholas
Ponzio<br>
<b>Sent:</b> Wednesday, December 02, 2009 12:13 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] trenching for solar thermal<o:p></o:p></span></p>

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<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>

<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Esteemed
Wrenches,<br>
<br>
What is your preferred method for running thermal lines underground? We are
about to start a sizable ground-mount system and want to make sure we do this
right. (I've already seen it done the wrong way, the dirty way, and the hard
way.)<br>
<br>
Thanks in advance for any feedback.<br>
<br>
Best,<br>
Nik<br>
<br>
</span><o:p></o:p></p>

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