First post here. I've read through most of the vertical loop posts, but didn't see my question addressed. I'm doing a DIY geothermal installation in Arkansas and plan on installing 3 vertical loops, each 230' deep and 20' from my basement wall penetration. I'll be making the header in my basement mechanical room. I'm planning on 1" dia by 510' long Centennial Plastics pre-made U-bend loops. My water well ~100' from the geothermal wells is 100' deep with water to within ~10' of the surface. Assuming these geothermal wells will have approximately the same amount of water in them, how much additional weight will I need to add to the water filled and pressurized loop pipes to sink them to the bottom of these wells. Will one 20' stick of 1/2" rebar attached to the U-bend bullet and pipe be sufficient to sink the pipe? Assuming 20' of 1/2" is enough, would it be better to cut the rebar in half and attach two 10' pieces to the U-bend - one on each side? Seems like it might be easier to get it started into the hole with two 10' pieces rather than one long 20' piece. Also, how is the steel typically attached to the U-bend? Packing tape? Duct tape? Gorilla tape? The pipe I looked at at the local supply house had 1/2" grooves on either side of the U-bend bullet to accommodate two pieces of rebar. Thanks.