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><font face=arial color=scarlet>Vey gives excellent >advice. Well development can vastly improve >productivity and efficiency, i.e. greater gpm and less >unwanted silt, grit, and fine clay making it into the >well. > >Also it's important to remember that filters aren't >necessary in a properly developed well with >functioning wellscreen with a mesh suited to the >aquifer from which the groundwater is being drawn. A >proper mesh for a drivepoint intended to draw water >from an aquifer in which fine clay is present will be >somewhere between .008 inch and .01 inch. Some big box >stores seem to think that one mesh fits all and do >their utmost to get out of special ordering. Then, >when the customer complains that his new well is >pumping sand, the supposedly knowledgable clerk >recommends a vast array of filters that inevitably jam >up when you need them most. A good fine mesh >wellscreen along with the outer layer of properly >aligned particles that comes from development will >ensure that nothing bigger than a molecule of water >can get into your well. > >Filters are the purvey of monitoring wells >intentionally designed to sample an aquifer for >chemical plumes and/or traces of contamination. Other >than activated charcoal and similar in line >canister-style filters designed to improve water >quality, a production well should <B>NEVER</B> need a >filter. If it does, either something is wrong with the >wellscreen or the well hasn't been properly developed. >A water well cannot become a money pit if you can spot >the difference between knowledge and a sales pitch. >The U.S. Army has an acronym for it, KISS, which >stands for "Keep It Simple, Stupid". When it comes to >water wells, you are usually better off without the >bells and whistles.</font> > >>>Water from new sandpoint in Northeastern Wisconsin is >>>fine sometimes, fades to nothing other times. Latest >>>discovery is that when we put in a new filter, water >>>flow is great but two or three days later it >>>disappears. Seems that the filter gunks up that >>>quickly, with grains of clay (?) apparently from the >>>well (?). Will this problem go away by itself? How >>>soon? Any way to make it go away fast? >> >>Run it. If it really is the filter jamming up and it >>isn't running out of water, then taking the filter off >>and letting it run is best. >> >>But, did you do anything to develop this well before >>you started using it? Bailing and surging, using >>compressed air, or overpumping are methods of well >>development. But be warned, after development, things >>will probably get worse before they get better. >> >>For an excellent article about well development from a >>school for pros, see this article in a rather large >>PDF file: >><a rel=nofollow target=_blank >>href="http://welldrillingschool.com/courses/pdf/wellde >v >>elopment.pdf">http://welldrillingschool.com/courses/pd >f >>/welldevelopment.pdf</a> >> >>skim down to page 10, "Washing and Backwashing."

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