Posted by Sagebrusher on May 23, 2008 at 09:10:50 from (66.82.9.58):
In Reply to: Well Pump posted by Sam Mansell on May 20, 2008 at 18:22:21:
Hi Sam, Hopefully you have it fixed by now. I think Bus Driver diagnosed your problem with a plugged or partially plugged injector nozzle (also called the "jet" at the bottom ot your well pipes. By priming the pipes with an up and down motion, (this is how the old rod and cylinder pumps worked) you know that your injector is in at least some water, that your foot valve is holding, and that your well is not completely dry. If the water level is low your pump will at least start pumping and make pressure for a bit before it draws down and breaks suction. It is VERY common for corrosion to dislodge from a disturbed pump case, fittings or, galvanized well pipes. The smaller "drive" or pressurized pipe tends to pack foreign objects in to the and prevents the "high/low" venturi action from working. A flat fleck the size of a pencil erase can stop a jet pump dead. Without the venturi or jet action the pump impeller at the top just sits and spins but centrifugal action alone cannot pump water much over If you are fortunate enough to have poly pipe you need to pull the pipe and remove the injector for inspection and cleaning. If you have older galvinized pipe you should plan to pull, or have it pulled, and replace it with a high grade of polly pipe. Note, if you already have poly pipe, keep the pump end higher than the inector end as the crud in the bottom will flush back into the pipes and end up in the jet again when you install it. Leroy is correct too about needing a regulator valve between the pump and the tank or discharge for most pumping levels. The regulator forces a portion of the water in the case (i have forgotten he average ratios of circulating water vs discharged) down the smaller drive or pressure side well pipe, through the nozzle and venturi. Hope you already figured it out but if not, hope this helps. My email is open if you have off line questions. Hope you have a good Memorial Day Don
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