[RE-wrenches] trenching for solar thermal

[Nicholas Ponzio]

Esteemed Wrenches,

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.)

Thanks in advance for any feedback.

Best,
Nik


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