Increase the Water Flow Rate or Quantity Guide to Improving Well Yield, define minimum acceptable well flow
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InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. How to get more water out of a water well: This article describes the minimum acceptable well yield or water flow rate for a well to be functional. Next we describe how to increase the yield or flow rate of a water well using several approaches, and we define hydro-fracturing for well stimulation. We will discuss these topics: How do We Get Enough Water From a Well with a Poor Recovery or Flow Rate? Well Stimulation Methods. Well stimulation methods & equipment: hydro-frac packers, DST packers. What is hydro-fracking or hydro fracturing & how does it increase well yield. What is the minimum acceptable well yield or flow rate? The sketch at page top, courtesy of Carson Dunlop Associates (found at page bottom, Click to Show or Hide), outlines what happens during a well drawdown or well flow test procedure. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. What is the Minimum Acceptable Well Yield or Well Flow Rate?Some wells can produce a flow rate of 20 gallons per minute (gpm) or more. But for a single family home, 5 gpm is good, and 3 gpm is livable. In some communities the health department or building department will require at least 3 gpm (or more) to approve a new well for new construction. These are general flow rates, but a more accurate answer to the required well yield flow rate for a specific property depends on the anticipated water quantity need for a given home, number of occupants, types of water usage, and thus the anticipated daily water usage, factored against the well yield (and possibly well recovery rate). A risk with a well that already has a low yield is that the yield is at risk of dropping still further seasonally or permanently (common), or possibly failing entirely (less common). Therefore in buying such a property it would be prudent to presume that you will face additional costs to provide more or better water quantity. You might want to consult with local well drillers to get an idea about their experience in success in drilling wells in your immediate neighborhood as well as the typical well depth, yield, and cost. See WATER USAGE TABLE for a table that will help calculate the water flow rate or daily water usage for a property. In the worst case with a slow or low yield well people install additional water storage/holding tanks to collect water at the low rate available from a well and provide water and then deliver it at the needed rate. If a well yield is too low, in addition to reducing unnecessary water usage (conservation), increasing the onsite storage quantity (holding tanks), making sure equipment is working properly (no leaks), and the option of drilling a new well and hoping for a better yield, there are various methods to increase well yield. Just below we explain How to Improve Well Yield or Improve the Quantity of Water Available. How do We Get Enough Water From a Well with a Poor Recovery or Flow Rate? Well Stimulation MethodsBefore drilling a new well to get more water, some plumbers or well installers will try these things:
Reader Comments & Q&AIt sounds as if you need a well company to investigate the flow rate of your will. If that's the limiting factor, and it sounds like it may be, it might be possible to increase the well yield instead of having to drill a new well. That's the subject of the article on this page. We replace the water line 5 year aho put new pump the water is just barely come out you
have to wait 30 minutes tp fill yourtub we try every thing new bladder still nothing only a drip run style open wide I have a bore hole that works under its own. I need to increase the discharge quantity. Will a petrol suction pump achieve this just by connection the suction hose onto the discharge pipe of the borehole? My borehole went dry but it used to have a good yield of around 1.5 cubic. How can i increase yield? Very informative and eye
opening. Now I don't feel so ignorant on the subject. Thank you! Good article! Please I just dug a well last month, but to my greatest surprise the rate of flow is very low. Please how can I improve the rate of water flow from the well? The well is just one month old. Innocent, I don't understand the situation nor the question, but it sounds as if you want to build a cistern to conserve springwater; you will probably need a water treatment or sanitization system too. the springs exists but it pours water every day, so i want to get a project on to conserve the water in the area help me with a project on how to improve on the quality of water in civil engineering My well is running dry as we are in a drought in NYS. should we try hydro
fracturing. We are on a tight budget and want the best advice. Any advice is greatly appreciated I have checked it, but even with no water coming into the house the water table drops 50 feet within 10mins, there are no leaks in the house. Only thought is that there is a leak in the ground to the house, but all I have is dry dirt, you would think I would have some sort of grass growing if that was the case. Any other thoughts? Question: returning well to use we find it runs out of water after a short timeIf a well has not been used for 6 years it was a good well then we hooked up to it again and you can run water about 40 minutes then it quits. With the well setting for that long will this hurt the well, Will it not be as strong as before? - Diana 5/25/12 Reply:Diana your question seems to have two parts that I can't quite relate. Running or not running water won't damage the well itself, though a well in use often finds over years that its yield or recovery rate may decline as minerals and crud clog the rock fissures through which water enters the well. Less use, slower clogging. Running out of water after 40 minutes?? That is a bit unclear - 40 minutes at 1 gallon per minute, or 40 gallons, is an inadequate well. 40 minutes at 10 gpm is 400 gallons and is a lot of water. Question: well keeps running dry - would installing a more powerful pump help?We have a well that is about 100' - water starts about 20' below the well cap. We are forever running "dry" after running the water for about 20 minutes. e.g. I fill my kids kiddie pool with about 40 gallons of water (takes 15 minutes or so) and then run the dishwasher we will run out of water and draw nothing but air in the lines. We have to turn the pump off (it will keep running) then I turn it back on 30 minutes later and it will build pressure again. We have a deep well jet pump 1/2hp. Would increasing the hp of the pump to 3/4 allow us to draw more water? or do we just have a crappy well? All of our neighbours have lots and lots of water. - Ella 6/11/12 Reply: No.RE: will putting a more powerful pump on our well system improve how much water we get? Ella, from your description your well has a static head of 80 feet. Figuring that the pump is perhaps 5 ft. from the bottom, you have a column of 75 feet of water in the well when it's at rest and fully recovered - that's about 112 gallons of water. If you draw water out of the well at 5 gallons a minute you have about 20 minutes of water on hand in the static head. If you are running out of water quickly that means that your well has a slow recovery rate - you are taking water out of the well faster than it recovers so you just get the static head and then run out of water. Putting on a more powerful (higher hp) well pump will NOT improve matters, it will make them worse. You will draw the water out of the well faster than ever - running out sooner, probably wasting water by running faster than need be. Your options to get more water are to add local storage tanks or to try to increase the yield of the well (the article found above). Question: old timer advice to put crawdads (crayfish) in the well to open up cloggingI have heard from some of the old timers that putting crawdads in your well will help to open up the clogging where the water comes in. They should not get sucked up the foot valve and I don't think they would produce enough bodily waste to contaminate the water but I would have the water tested to be safe. If you know any thing about crawdads they like to dig and just a few of them can dig many holes and they are content to stay under water. - Mike 7/2/2012 Reply: balderdashRE: Should we put crawdads or other animal a drilled well? Mike I'm doubtful there being any benefit whatsoever from putting crawdads into a drilled water well - we used to find them in our springhouse but not at the bottom of a drilled well - I don't recommend it - they won't like it down there. I doubt that crawdad fecal waste would be an issue - there's nothing for them to eat in a drilled well, they will die, and body parts might even clog the foot valve or intake on a submersible pump. Water enters most drilled wells through rock fissures - not something a crawdad can excavate. If your well has lost yield, hydrofracking (discussed in the article above) using one of several methods can help improve the well recovery or flow rate, and unlike the crawdads, it has a track record of success. (And costs more too). Question: well with a small static head: how do we improve it?I have a a well with 5 " casing that is 45 ft deep. The submersible pump is at 40 ft and water will fill the casing up to about 30 ft. After pumping it starts to pump air. Will jetting the well help to clear out sand and increase water flow or do I need to deepen the well. How does one go about jetting a well or how does one deepen the well. My neighbor's well is 60 ft and he has plenty of water. - Lee 7/24/12 Reply:Lee, Your well has only a ten foot static head - about 15 gallons - or nothing. So it is almost entirely dependent on the inflow rate to the well to provide a functional water supply. The fact that your system is pumping air sure sounds as if the well is getting ahead of the water flow rate into the well. You should talk to your local well drillers about steps to increase yield; some procedures guarantee the result; if that doesn't work, it's new well or deeper well time. A makeshift interim measure is to install a cascade of above ground water tanks that are filled slowly, at the flow rate of the well. Question: how can we help a basement well with very little water - it runs dry and sucks mudIs there any way to help a well that is located in a basement. My well is 82 years old and is giving me issues. It will run dry (suck mud) after only 50-60 gallons. It will take about 1/2 hour to recover to a point where the jet pump can re-prime and come up to pressure. The well is presumed to be pretty shallow (40-60ft) but needs to be measured. I have spoken to others in the neighborhood... My neighbor 4 doors down has a 13ft deep well that he has never been able to run dry. He fills his pool! Could the poor recovery be clogging? could this frac packing help? can that be done in a well located in a basement? - Aaron 9/23/12 Reply:Aaron, a shallow well like your neighbor's 13-foot deep one can be hard to keep sanitary - but that's a different issue from running out of water. It's not a surprise that well flow rate would decline in an 82 year old well - mineral deposits or silt tend to clog up rock fissures through which water flows to the well. There are two approaches: this is a drilled well, right? If so you can hire a company to try hydro-fracking to increase well yield; THe second and in your case not so great approach, is to add water storage tanks. Question: well yield is too low - about 2 gpm; looking for a well hydro-frack company in western PAhave a low yield well 2 gallons 15 min put 2500 gallon holding tank drilled 200 foot well no water can not find someone to go into 6in casing in old well to clean or hydro frack western pa help - Anonymous 10/3/12 Question: well flow rate of 1/2 gpmMy wife and I are considering moving to a property, but only recently found out that it has a water flow problem where the flow is approximately 1/2 gal per min. We are considering a water storage tank as the property has a large basement big enough to house a high volume tank. We are concerned however about how much electricity is used by the pump when the tank is filling. Can you give me some idea about that extra cost? - Matt 10/5/12 Reply:Matt, adding a large water storage tank can help live with a marginal well, though the remaining life of the well may also be in question. Take a look at WELL PUMP / TANK REPLACEMENT COSTS for details. Question: irrigation well is inadequate - what are our options for irrigation?We had a well driller drill a new well for an irrigation system that requires 40 to 50 gpm. He put in a 5" well 255' deep with 40' of screen. We had it tested and it produces 15gpm. What are our options? -Lori 10/6/12 Reply:Options to improve the service of an irrigation well include:
Question: how can I refresh the yield of my well given that I don't want to drill a new one*120' well built 1978 So: i'm guessing that my well is running dry, the pump screen is clogged or the well casing / screen is clogging. i'm going to have a man pull that pump next week but i'd like some suggestions on how to 'refresh' that well. i can't afford to drill another hole. - Tim 10/23/12 Reply:Tim, some of the well yield improvement companies offer a guarantee that if they cannot improve well yield you don't pay. Question: Conflicting advice about minimum depth required for hydro-fracking a water wellI am getting conflicting info regarding fracking a well that is 78' deep with the info below I am being told you can't frack such a shallow well and expect to get more
GPM Reply:Real In general I expect the well yield improvement fracking process success depends a lot on the underlying geology and hydrology of the area so I am not sure there is a single correct minimum depth requirement for well fracturing processes. Question: well pump stopped pumping water, new pump lost pressure after one dayAbout a month ago our well pump stopped pumping water all together. I called a professional who came out and replaced our ½ HP pump with a ¾ HP pump. The new pump worked great for about 24 hours. After using the new pump for about a day it lost a great deal of it’s pressure. It was still pumping water into our house, but the pressure/volume of water at all outlets in our home were only getting about 1/4 the pressure or volume of water they had. The whole time we had low pressure the pump was running, and this low pressure continued for hours. After a few hours of low pressure I tried turning the power to the pump off and bleeding all the water from the outlet right next to our pressure tank. After flipping the power back onto the pump I could hear the water rush back into our pipes. A short time later, maybe 15-40 seconds the pressure switch flipped off and the pump stopped running. We had good pressure for about another day or two and then the problem occurred again. Anyway I called the pumper and explained the problem. First he replaced the pressure switch. Didn’t work. Next he dropped the well pump 10 feet, his thought was we we’re pulling the water level down below our pump. This also didn’t work. About a week ago he dropped the pump another 10 feet. We still continue to have the same problem, but it happens every 5-7 days. I’m not sure if lowering the pump actually helped or not, but it did appear to make the problem happen less frequently. All of this sounds like what’s described under “Adding a More Powerful Well Pump Can Improve Pressure, Increase Flow Rate at Faucets ... and can Lead to Trouble“ found on the following page ( WELL FLOW RATE ), but I’m not sure. I would greatly appreciate any advice people are willing to offer. - Peter 12/4/2012 Reply:Peter, Bleeding water out of the water pressure tank will improve well pump short cycling by allowing an air charge to be restored in the tank, but it won't fix water pressure or flow rates. The fact that your well contractor lowered the pump suggests that he thinks that the well has a small static head (not much water in the well). Your description suggests that the well flow rate may no longer be able to keep up with the pump; if the pump drops water level too low in the well, and especially if it includes a pump burnout safety device or tailpiece, then when the water level in the well is low, the pump will simply stop pumping or slow pumping water out of the well. Some additional things to check include:
Question: improving water yield from a dug well in rock - drilling, explosives, informationI am from southern part of India. I would like to have some advice from you for my domestic well. The well was dug in 2011 . There was plenty of water for about 1 year. After that the ground water flow reduced to a level that in summer, availability of water is hardly for one family only, if we use minimum amount of water. We never over-used water any time. The well is full of hard rocks. We dug to about 11 meter depth
and the diameter is about 1.8 meter. We used traditional method , ie, drilling holes in the rock and filling with explosive material and crack the rock. The interesting part was , we stopped drilling the moment water started flowing in good volume from bottom of well. Later upon inspection while cleaning the well, we found that water was flowing from a drilled hole made for explosives and it wad perpendicular to the well bottom. We left it that way since there was plenty of water
flow from that hole almost like water flowing out of a 1 inch diameter pipe. Now at present situation, we feel we should have dug the well further down at least to the depth of drilled hole from where water was coming. Please advise me if we dig further down is there a possibility of enough water ? If so how much deep ? I have attached a diagram of our well for you . Please give me your valuable advise? - S.V. 8/4/2014 Reply:I'm of course nervous about advising repairs for a system I don't know well and moreso about using explosives, though my older friend Paul grew up with well like yours and describes occasional use of dynamite to restore water flow. It's reasonable to think that drilling more deeply in the same opening at the well bottom might restore water flow - most likely the aquifer level has fallen due to dry weather and falling water levels everywhere. Improving well flow is always a lottery since there is also a chance that messing with the well can actually reduce its water flow - for example if we open a passage that drains water away rather than into the well. If you have close neighbors who use similar wells it would be instructive to ask them what's been happening with their water supply and about the depth of their wells as well. Still, I would try first drilling the existing hole deeper if you can do so. If that helps, try drilling additional nearby holes. If you decide to try more explosives to deepen the well over a wider expanse please send me a follow-up email with the results and with an assurance that nobody got smacked by flying rock. Photos of the well and the procedure would be valuable to other readers as well. Question: How do I determine if I can safely drop a 20 gpm pump in this well?(May 8, 2015) Sherwood Botsford said: We do this once a year.But what brought me here: At present we have a 6" steel cased well with a 1/2 hp pump. The well is 140 feet deep, the pump is about 30 feet off the bottom. Static water level is 8.91 meters below the surface. Pumping at 8 gpm from a local tap using the well's pump results in the well pump running continuously. Readings over the next few minutes 9.74 9.76 9.80 9.82 9.83 9.84 Recovery 9.54 9.08 9.02 9.0 8.98 8.97 8.96 8.955 This well is used for both irrigation and for household use. During the irrigation season it runs 16-24 hours a day. Our operation is limited by the water we can pump. I asked at the local electrical shop, who also does well wiring if it would be reasonable to replace the 1/2 horse pump with a 1 horse pump. He was willing to sell me a pump, but cautioned that some wells in the area when upgraded to a higher volume pump started moving sand in the local formations, and in the space of a couple years were reduced to 2 gpm. I have read the logs for the section I'm in. The logs are not close to consistent. Shale, sandstone, hard sandstone, clay, coal, in any order. Subtracting the static head from the elevation is not consistent. This is in accord with my own experience of the surface 3 feet (I have a tree farm) Two auger holes 5 meters apart can produce either clay or fine sand or peat once below the A soil horizon. How do I determine if I can safely drop a 20 gpm pump in this well? Reply:Thanks for the comments, Sherwood. They will assist other readers. About the well bore pumping rate, you can obtain objective data by following what well drillers do: use an adjustable flow rate pump to see what pumping rate can be sustained over 24 hours. The recommended reading at the end of this page contains well yield articles that may be helpful. Question: My water goes off an on for about 30mins and then goes down to nothing.30 May 2015 anthonyb said: My water goes off an on for about 30mins and then goes down to nothing. So I bought a new tank and pump thinking that would take care of the problem. But now my water stays on for only 15mins and then goes down to nothing.. any thoughts? Reply:Anthony you want to check the actual flow rate of the well. It sounds as if the in-flow rate of water into your well bore has become quite limited. Then see WELL YIELD IMPROVEMENT ... ... Continue reading at WELL FLOW TEST for WATER QUANTITY or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES. or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Or see these Recommended Articles
Suggested citation for this web pageWELL YIELD IMPROVEMENT at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. Or see this INDEX to RELATED ARTICLES: ARTICLE INDEX to WATER SUPPLY, PUMPS TANKS WELLSOr use the SEARCH BOX found below to Ask a Question or Search InspectApedia ... Ask a Question or Search InspectApediaTry the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Search the InspectApedia website Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Apologies for the delay. Our Comment Box is provided by Countable Web Productions countable.ca Technical Reviewers & ReferencesClick to Show or Hide Citations & References How do I increase well flow rate?Installing very large water storage tank(s) that are filled slowly when irrigation is not in process - you 'll need to calculate the necessary water volume and fill time to see if this option is viable. Using one of the procedures described here to improve well yield. Drilling one or more additional water supply wells.
What is a good flow rate for a well?The Water Well Board suggests that a minimum water supply capacity for domestic internal household use should be at least 600 gallons of water within a two-hour period once each day. This is equivalent to a flow rate of 5 gallons per minute (gpm) for two hours.
How do I get better water pressure from a well?Easy Fixes for Low Well Water Pressure. Clean Clogged Faucets & Fixtures. Over time, faucets and fixtures get clogged with sediment and mineral deposit buildup. ... . Adjust Your Pressure Switch. ... . Clear Clogged Water Lines. ... . Install a Water Softener. ... . Install a Water Pressure Regulator.. Is 20 gallons per minute a good well?You could have a great well water flow rate - say 20 gallons per minute - but if it the water will only run at that rate for five minutes before you run out, the well has a very poor water quantity (5 minutes x 20 gpm = 100 gallons of water) and it's not a satisfactory well.
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