(206) 949-5683, Top Rated Plumber, Seattle
Page 1 of 2 12 LastLast
Results 1 to 15 of 22

Thread: Lorentz Solar Helical Pump Question

  1. #1
    DIY Junior Member V8Vega's Avatar
    Join Date
    Oct 2013
    Location
    Arizona
    Posts
    9

    Question Lorentz Solar Helical Pump Question

    Hello. I have a well just drilled & capped in S.E. AZ. The depth is 340', Static is 242", & the casing is 6". I also have 6 new Schott 240 watt PV panels. After hours of banging my head against the wall, I've decided to buy a Lorentz helical. My question is should I go with a larger pump for reliability? I've been told to just get enough pump, but I was wondering if a more robust pump would last longer. I was looking at the PS1200HR since I have the panels.
    Thanks, this is a awesome forum...even it's a little over my head.

  2. #2
    In the Trades Texas Wellman's Avatar
    Join Date
    Feb 2010
    Location
    SE Texas-Coastal
    Posts
    487

    Default

    Are you completely off grid? Do you plan on pairing your pump with a generator or grid power?

    I install and use the Lorentz solar pumps and I like them very much. Just make sure you are good on the pump curve and set-up your panels the right way.

  3. #3
    DIY Junior Member V8Vega's Avatar
    Join Date
    Oct 2013
    Location
    Arizona
    Posts
    9

    Default

    The well & future cabin are off the grid on the E. side of my property. My neighbor on the W. side plans to bring in PWR at some point. When & if that happens, any future buildings will be on the grid with solar back-up.
    All the curves will work, so I will just go with the PS1800HR for the added flow. Will this pump fill a pressure tank that will sit about 50' from the well, or will I need a cistern/pressure pump?
    Thanks a lot for the help!

  4. #4
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,156

    Default

    That pump can build 820’ of head. That is enough to lift from 242’ and still develop 250 PSI more pressure. You don’t want more than about 60 PSI in the pressure tank, so be sure and use a good pressure relief valve incase the pump doesn’t shut off when it should.

    Back in the 60’s and 70’s they had a helical well pump we called the Peerless Wiggletail. One of the problems with the helical shaft was the tremendous pressure they would build when the pressure switch failed to shut them off. I saw where several galvanized tanks blew out the bottoms and went through the roof of the well houses like a rocket. The well houses looked like a bomb hit, and the tank was usually out in the pasture a few hundred feet.

    So you don’t need a “cistern or booster pump”. But an extra pressure relief valve or two might be a good idea.

  5. #5
    In the Trades Texas Wellman's Avatar
    Join Date
    Feb 2010
    Location
    SE Texas-Coastal
    Posts
    487

    Default

    Let us know how you like the set-up. I have never used that particular model of Lorentz so I'm curious how you like it.

  6. #6
    DIY Junior Member V8Vega's Avatar
    Join Date
    Oct 2013
    Location
    Arizona
    Posts
    9

    Default

    Will do Wellman. I appreciate all the help from you guys more than you know. The property is 300 miles from my house, so this is a project. What is the formula to figure out how far horizontally that spare 250 PSI will travel? I didn't know any of these "solar" pumps delivered this kind of performance.

  7. #7
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,156

    Default

    1 PSI equals 2.31 feet of lift. Horizontally there is only friction loss of the pipeline. At 10 GPM flow, 1 ” PVC pipe has .42 PSI loss per hundred feet of friction loss. Which means you could go 59,523 feet or 11.27 miles with 250 PSI.

    Vertically for every 2.31 feet you need 1 PSI. You can always use larger pipe if friction loss is a problem.

  8. #8
    In the Trades Texas Wellman's Avatar
    Join Date
    Feb 2010
    Location
    SE Texas-Coastal
    Posts
    487

    Default

    Valveman,

    Theoretically speaking, what would happen if you had 59,524 feet of horizontal pipe? Would water still flow out at the end? Inquiring minds want to know.

    Quote Originally Posted by valveman View Post
    1 PSI equals 2.31 feet of lift. Horizontally there is only friction loss of the pipeline. At 10 GPM flow, 1 ” PVC pipe has .42 PSI loss per hundred feet of friction loss. Which means you could go 59,523 feet or 11.27 miles with 250 PSI.

    Vertically for every 2.31 feet you need 1 PSI. You can always use larger pipe if friction loss is a problem.

  9. #9
    DIY Senior Member Reach4's Avatar
    Join Date
    Sep 2013
    Location
    IL
    Posts
    1,251

    Default

    Quote Originally Posted by Texas Wellman View Post
    Valveman,

    Theoretically speaking, what would happen if you had 59,524 feet of horizontal pipe? Would water still flow out at the end? Inquiring minds want to know.
    Yes, but only 9.999 GPM.

    Like the museum tour guide who said the fossil was 65,000,007 years old because he was told it was 65 million years old when he started 7 years ago.
    Last edited by Reach4; 10-22-2013 at 08:09 AM.

  10. #10
    DIY Junior Member V8Vega's Avatar
    Join Date
    Oct 2013
    Location
    Arizona
    Posts
    9

    Default

    Awesome news! My lot is about 400' wide from the well to my future house site. I was having nightmares about booster pumps & such. I bought the property on the west side ( 2 surveys here ) 2 weeks after I drilled the well. You just made my day Valveman!

  11. #11
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,156

    Default

    Quote Originally Posted by Texas Wellman View Post
    Valveman,

    Theoretically speaking, what would happen if you had 59,524 feet of horizontal pipe? Would water still flow out at the end? Inquiring minds want to know.
    In that length of pipe you would still get the 10 GPM out the end, but you would have used up all 250 PSI and there would be no pressure left. You could fill a pond or a cistern though.

    With only 400' of pipe, I would put in a couple of good pressure relief valves just in case the pressure switch got stuck in the closed position, because that pump will deliver LOTS of pressure.

  12. #12
    DIY Junior Member V8Vega's Avatar
    Join Date
    Oct 2013
    Location
    Arizona
    Posts
    9

    Default

    WTH?....It's impossible to buy a Lorentz pump around here. I can't understand why a company would make it so hard to purchase their product.

  13. #13
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,156

    Default

    That is the way all pump companies used to be. They want you to go through an installer. Probably not a lot of DIYers doing deep set solar pumps, so they don't want to upset their dealers.

  14. #14
    In the Trades Boycedrilling's Avatar
    Join Date
    Sep 2013
    Location
    Royal City, WA
    Posts
    23

    Default

    A distributor talked to me a couple of years ago about selling & installing the Lorentz pumps. They weren't interested in selling to a pump installer in the trade that was just going to install one. Too much to go wrong. They wanted you to go to their pump school first to even be considered to be an installer. They did not feel that this was a product for a professional to install without specific training, let alone a do-it-yourselfer.

    If I went thru their training, then they would refer other pump installers to me, for me to design and install the system.

  15. #15
    DIY Junior Member V8Vega's Avatar
    Join Date
    Oct 2013
    Location
    Arizona
    Posts
    9

    Default

    I have an acquaintance who works for a large well drilling/pump servicing & rebuilding company. He works on the big municipal wells around here and is going to see about getting a pump for me. No wonder the well guys near my property don't use Lorentz.

Similar Threads

  1. Jet Pump For Non-Pressurized Solar System?
    By atw58 in forum Solar and Geothermal Water Heating Forum
    Replies: 1
    Last Post: 07-01-2011, 02:02 PM
  2. Solar pump
    By upper in forum Pumps and Tanks Well Forum & Blog
    Replies: 3
    Last Post: 06-01-2009, 10:07 AM
  3. solar pump
    By kinghan08 in forum Solar and Geothermal Water Heating Forum
    Replies: 0
    Last Post: 08-04-2007, 07:12 AM
  4. solar pump
    By kinghan08 in forum Pumps and Tanks Well Forum & Blog
    Replies: 0
    Last Post: 08-04-2007, 07:12 AM
  5. 12 volt DC/Solar pump
    By dscogin in forum Irrigation / Sprinkler Forum
    Replies: 2
    Last Post: 07-24-2007, 08:54 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •