Hi Tim, I wonder how much water has condensed in the nicely cooled underground loop. From: N2VZD at aol.com Subject: Re: <VV> Air Compressors (my ramblin's) ........... It then goes underground to the shop in 1 inch copper inside 1 1/4 pool plastic . ................. Regards, Tim Colson http://www.cnycorvair.com/Little_Corvair_Shop.php