![]() The pump's actual pumping rate will be less depending on the number of meters of lift it has to overcome. IN general a 50 GPM pump can pump a maximum rate of 50 GPM - by definition. On by (mod) - true pump delivery rate varies by lift height She claims she is worried about the inspector burnig out her mototr if the water is run full blast for 2-4 hours. If the seller of a home insists that we do not run a quantity test on their home, which i'd like to purchase, how much should I worry? That is, unless the well has a very large static head, if the well flow rate is really inadequate, that usually shows up during the 2-3 hours of a home inspection or a septic loading and dye test. Other "tests" of water flow, such as running 3-5 gpm for some time period, are not a complete, valid test, but they are reasonable indicators that the well appears to be reasonably functional. If the volume of water your "test" is taking out of the well exceeds daily water usage norms in total volume or in time, then it's a bit of an extreme test that could also be questioned.Ī properly constructed well flow test is done over 24 hours and measures the actual flow capacity of the well it usually requires a calibrated, adjustable-flow-rate pump used by the well driller at the time of well construction: that's not something you're going to accomplish at a home inspection. Some water pumps are capable of delivering a very high water flow rate. Nor do I consider 2-4 of running water a valid well flow test. However a well flow test needs to be performed properly. There may be no actual problem but rather someone has told the seller to avoid letting your inspector test something because the "someone" has elsewhere run into these problems and hopes to avoid disclosing it at the seller's home. The seller knows that there is a well water problem or has had a history of running out of water or burning up well pumps, so she is telling you ahead of time that the well capacity is limited and that depending on the situation and your needs you could be facing a significant cost to get enough water supply.Ģ. There are in my experience only two explanations for such a position:ġ. If a home seller will not permit a well water flow test or quantity test you should be very worried. On by (mod) - home inspection dilemma about refusing to let a well be tested One expert told me that the casing should go all the way down to the same level as when it hits water. The first of three filters shows an unusual amount of silt coming in. We put in a filtration system to take the silt out as it enters our home. We are getting sand and/or silt in the water all the time for several years. The well at our home in Beaufort SC hits the Florida aquifer at 182 ft and is drilled to that depth. On by a well flow test be done on a piece of property that has no power? That could be as long as 24 hours depending on the test specifications. Yes, but you would need a generator or an energy or power source to keep the pump running during the test. What if my well isn't flowing 10 GPM? Does the pump match itself to well recovery or is it running away from my water? Thanks I recently replaced a submersible well pump with a 10 GPM pump. Scott a tailpiece in the well or a pump protection switch protect a well pump from being damaged when well flow rate is poor. On by (mod) - well pump protection for low flow wells The sketches shown here were provided courtesy of Carson Dunlop Associates. ![]() These questions & answers about well yield testing or flow tests were posted originally at WELL FLOW TEST for WATER QUANTITY - be sure to see the procedures and advice given there. Q&A on How to Do Your Own Well Flow Rate/Well Yield or Drawdown Test 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. This article series describes how a home owner or home buyer can test, measure, or estimate the amount of water available from a well and how to evaluate the water pressure delivered in a building served by a private well. ![]() ![]() Well flow test / well quantity or recovery rate test FAQs. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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