I'm curious about the open loop setup with 2 water wells. One for suppy, and the other return. (Pump and Dump back into the ground)

Who has such a system? How well do they work? Have their been any problems with the re-injection of the water?

I ask this because the state water engineer here has a tough time approving these systems. They've not seen the re-injection well work very well without it affecting ground water. Not that it contaminates the water, because that's where it just had come from. Rather, they've seen it pressure up the ground water, causing leaks up to the surface, thereby POSSIBLY/POTENTIALLY allowing ground water to become contaminated.

anyway, I'm just curious how many people have successful pump and dump/re-injection wells.

Clark,
While I've no such installs of my own, injection wells have been very popular in MI for decades. I understand that areas are tightening control of these, but I've not heard of huge problems that weren't tainted by the bias of story teller.
Biggest issue for me is that you are still drilling two wells. If lot is that small, one or two more drills puts us in closed loop which keeps our iron laden water from plugging heat exchangers.
J

I'm in Ma.  Cape area.

  75% of the geo systems we Install are Open Loop.  Water is good here and close to the surface.

   One well and a place to dicharge. Drywell,  Surface  area.   Or a standing  colunm well.  SCW is deeper, 100 fet per ton.
   We pull water from the bottom and return to the top.  In most cases the water is also used for DWS.

  We also use lake or pond water. Most towns will not allow piping with anything in them,  Antifreeze. Also have done some commercal installs (50 ton )  using seawater.

Bye for Now

CapeGeo,

I am looking to install in the boston area, what manufacturers do you work with?  and what would you recommend for a well on a 1/3 acre lot with a lot of bedrock (type and depth)?  We are currently looking at a 4 ton or 5 ton waterfurnace system and have been concentrating on a closed loop system b/c we are told that there is legislation coming in that will make water testing mandatory every year in MA with an open loop system.

Heather

We Use mostly ClimateMaster.

On a 1/3 lot a vertical Well or wells would be my guess.

A standing Colunm well in  Boston Ma. would be a good why to go.
Water is good here and close to the surface. There are many systems like this already
in Boston so the Building Dept. Souldn't be a problem.
You will need a permit from State DEP. But that's no problem.

Bye for Now

North Florida water district still allows open loop dumping. SW Florida water district seems to require reinjection - water supply is tighter down there.

FWIW EPA classifies cooling water reinjection wells as type V non-contact - in other words water is not contaminated or altered except for a temperature change. A quick surf showed docs suggesting that many states recognize the low risk of this and allow it.