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Old 02-15-2010, 02:57 PM   #46
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The weight of a column of water is figured at .433 psi times the height. Yours is 25'-8' = 17' * .433 = 4.361 lbs.

You need to know the recovery rate gpm. And to do that you need to pump it a lot and usually with a large pump or air lift or purge with a bailer. If you lifted the pump a few feet and ran the water on the ground out the open end of the drop pipe to pull the water level down a foot or two watching the pump didn't run dry and then shut off the pump and measure the increase, you might be able to get an idea.
Well is 40' deep so wouldn't that be (40'-8') * .433 = 13.86 or (38'-8') * .433 = 12.99 lbs. if you subtract for screen.

It's below freezing here so running water onto the ground would be a bad thing unless I am trying to make an ice skating rink. I don't have one but if I rent a flow meter if it has no drop in gpm after 30-45 minutes would that be helpful?

I guess I can get C & J to come out and get current recovery if it doesn't cost too much.

--Chris


Last edited by ChrisDIY; 02-15-2010 at 03:08 PM.
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Old 02-15-2010, 09:21 PM   #47
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The pump's inlet is at 25' and you can't use any water below that unless you set the pump deeper in the well, right?

Recovery is the water refilling the well, you have to find out how much the water level rises in X period of time and then when you know how much in X time you calculate how many gpm that is. So a flow meter/gauge is not going to help you do that. After pumping for like an hour after the water level stops going down, if it goes down in this well at all (and if it doesn't the recovery gpm is the same gpm you are pumping out), you stop and start timing and measuring how much the level of water in the well rises; like 2' in x time and you need to know how much water your casing has per foot (I think it is .4 something gal in a 4" casing) that is the recovery rate gpm.
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Old 02-15-2010, 10:08 PM   #48
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Thanks Gary and Driller1.

I have my work cut out. I will most likely play it safe and increase my copper piping from pressure tank through softener and filtration up to my tankless heaters to 1". Increase before pressure tank to 1-1/4" up to a union and then reduce back to 3/4" as it comes out of the basement wall. At least this way if I or if I hire a contractor to increase if possible, I am ready. The connections on the softener, filtration and pressure tank are 1'' anyway.

I will look into getting well capacity determined, I'm sure local contractor will stand behind his work but I need proof I can get gpm I desire, not just constant pressure.

The other issue at hand is if I get 21 gpm into shower I need to get it out!

Last edited by ChrisDIY; 02-15-2010 at 10:15 PM.
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Old 02-18-2010, 09:22 AM   #49
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To the OP. Really, you do not have to be concerned about me. I just paid $500,000 cash for my second new well rig. I am doing something right.
I was searching for help with a Grundfo SQE. I have had mine replaced 4 times in 6 years. Twice it was only the control. One time they replaced everything in the well. The forth time I don't know what they replaced. My well driller just bought a new truck also. I didn't know they cost that much but, I assume he can afford it because of all the money he made from me and others on these stupid SQE pump. I am now looking into the Cycle Valve. I suggest you stay away frrom the SQE, or your driller will be driving around in a new truck that you helped pay for.
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Old 02-18-2010, 11:35 AM   #50
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I was searching for help with a Grundfo SQE. I have had mine replaced 4 times in 6 years. Twice it was only the control. One time they replaced everything in the well. The forth time I don't know what they replaced. My well driller just bought a new truck also. I didn't know they cost that much but, I assume he can afford it because of all the money he made from me and others on these stupid SQE pump. I am now looking into the Cycle Valve. I suggest you stay away frrom the SQE, or your driller will be driving around in a new truck that you helped pay for.
Hey!

Thanks for the warning! What problems were you having with it? Did they ever say what was wrong with it?

--Chris
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Old 02-18-2010, 01:29 PM   #51
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I was searching for help with a Grundfo SQE. I have had mine replaced 4 times in 6 years. Twice it was only the control. One time they replaced everything in the well. The forth time I don't know what they replaced. My well driller just bought a new truck also. I didn't know they cost that much but, I assume he can afford it because of all the money he made from me and others on these stupid SQE pump. I am now looking into the Cycle Valve. I suggest you stay away frrom the SQE, or your driller will be driving around in a new truck that you helped pay for.
Thank you Gray, but we all know these systems have a warranty for five years.
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Old 02-18-2010, 01:37 PM   #52
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Hey!

Thanks for the warning! What problems were you having with it? Did they ever say what was wrong with it?

--Chris
The five five years would have been under warranty.

edited - don't spread rumors

I have used them, they are good under a mobile with little room for a tank. They do leak but, outside it is OK.

Last edited by Scuba_Dave; 02-19-2010 at 02:16 PM. Reason: removed comment
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Old 02-18-2010, 01:40 PM   #53
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If you are really interested in that type of thing, here is a good company.

http://www.pumpsandtanks.com/index.htm
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Old 02-18-2010, 02:10 PM   #54
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Well I can put some grape jelly on the Grundfos idea! One installer says half the SQE he installed failed or had a problem.

Will look into the CSV. Regardless, I have to determine if my well can produce 21-25 gpm anyway.
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Old 02-18-2010, 02:33 PM   #55
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Well I can put some grape jelly on the Grundfos idea! One installer says half the SQE he installed failed or had a problem.

Will look into the CSV. Regardless, I have to determine if my well can produce 21-25 gpm anyway.
I have had no problem with them.....but, I went to the schooling.
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Old 02-18-2010, 02:57 PM   #56
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Well I can put some grape jelly on the Grundfos idea! One installer says half the SQE he installed failed or had a problem.

Will look into the CSV. Regardless, I have to determine if my well can produce 21-25 gpm anyway.
I told you SQE systems were touchy to install. Many drillers CAN"T install them. One thing is the remote is expensive and some try it without one.
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Old 02-18-2010, 02:58 PM   #57
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Gary, the formula you posted The weight of a column of water is figured at .433 psi times the height
is for the pressure of the water in pounds per square inch, NOT the weight of the water. The weight of a column of water is simply the volume of the column of water times the unit weight of water, which is 62.4 pounds per cubic foot in English units. To compute the voume of water in a pipe, you take the area of the pipe times the height of the water.

A 4 inch ID pipe has an area of approximately 0.09 square feet, so 15 feet of water in the pipe would weight .09 * 15 * 62.4 = 80 lbs +/-
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Old 02-18-2010, 03:44 PM   #58
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Thanks for the phone call Chris (dawktaw

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Old 02-18-2010, 04:28 PM   #59
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Dawkta. Everyone here is talking variable speed pumps and now CSV's, but 99% of all systems installed out there are good old tank and pump systems. Trouble free, properly sized work for years and considerably less money to install.
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Old 02-18-2010, 04:32 PM   #60
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Dawkta. Everyone here is talking variable speed pumps and now CSV's, but 99% of all systems installed out there are good old tank and pump systems. Trouble free, properly sized work for years and considerably less money to install.
I agree. On the first post the OP appeared to want something special. Now, he wants cheap.

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