Standing Column Well - North Shore Long Island

Discussion in 'Standing Column Well (SCW)' started by Kevin, Oct 15, 2015.

  1. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    The local talent " boots on the ground " is what we prefer here. Doing a SCW in sand is going to be a gamble IMHO. A costly gamble if it goes badly. Ask the local guy. He should know if anybody has pulled this off in your local. If it is a no go, at least you can rescue the well for other uses. A horizontal loop would work fine, or explore ways to tighten up your house and go with a higher efficiency conventional set up. Sometimes getting geo is like trying to put a round peg in the proverbial square hole. Knowing when it is not going to be a good fit prior to spending a wheelbarrow full of cash, makes you an expert! Keep us posted. A lot of the pros here do both geo and high efficiency traditional. Ask them and they will chime in with advice.
    Eric
     
  2. Kevin

    Kevin New Member

    Great, hoping to get him here asap. We have just started to consider to install another well to dump back down into. Is there anything I need to know about water quality/soil type for this application? How many GPM do you think I would need for a 5 ton and 3 ton unit from the same well? Does the sandy soil affect anything? Thanks!
     
  3. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    24 gpm would be your max demand. A pump and dump can be tuned down to as low as 1.5 gpm per ton reducing your demand by 1/2. Ask your local talent what they think. If they are positive about it, god on you! If they hesitate..... you have a answer.
    Eric
     
  4. Kevin

    Kevin New Member

    So he went out to take a look and is going to price up dropping a dump well. He said he wouldn't pull more than 17GPM from an old well like that because you can pull up the screen from the bottom. I'm going to ask if we could pump from the new well and dump to the old, does that make sense? For what it's worth, I don't think this guy is a geothermal guy, he's a well guy. But he has been involved in a few pump and dumps before.
     
  5. geoxne

    geoxne Active Member Forum Leader

    You need to have your existing well tested for water quality and capacity (extended pump down) before you make any decisions.

    All manufacturers list minimum water quality for there equipment by coil type in the specification catalogs.

    The rule of thumb for open loop with 50F or greater entering water is 1 1/2 GPM per Ton.

    Take a look here if you want to find someone qualified in your area-
    http://www.li-geo.org/
     
  6. Kevin

    Kevin New Member

    Ok thanks! I asked about the extended pump down and the guys said wells literally don't run out of water around here. What type of water quality specs should I be looking for?
     
  7. geoxne

    geoxne Active Member Forum Leader

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