Jun 17, 2019 / DIY Digging trenches for Geothermal #141 buckeyefarmer Epic Contributor Joined Jun 25, 2005 Messages 24,745 Location MD Tractor Kubota L3940 L5030 MF205-4 BX23 I have 2 loops on a single pump and 3 loops on a double pump, nonpressurized.