I have recently had about 1/3rd of my geothermal open loop system installed(we have two units, only one of which, a two ton unit, has been installed) and the dump well sprays water out of the well head whenever the unit is turned on. I have spoken with the well driller and he has seen issues with this rarely in his past experience. I am concerned because if the dump well can't handle the return flow from the 2 ton unit, it will never work to hook up the remaining 5 ton unit as well. I am open to suggestions as to how to overcome this problem. It seems to me that it is a pressure issue with putting water back in to the aquifer. Currently, the water is put back into the well at the top of the well(3 - 4 feet underground). I am wondering if it would solve the problem to introduce the water into the well at a much lower point, even all the way at the bottom of the well if necessary. I am thinking that this would possibly introduce concerns with back pressure, but it seems that it would overcome the issue of water spraying from the well head. It seems that others must have had a similar issue and I would like to know how they solved the problem.