„Strittmatter Irrigation & Supply
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The pumps we install operate on 230 volt, single phase electricity. Pump will be set to a sufficient depth below the water static level on column pipe with heavy duty couplings to resist corrosion.“
( http://www.strittirrig.com/ww.html )


„GROUNDWATER PRODUCTION
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A line shaft bearing, also known as spider support or spider bearing, will be located in every section of discharge column pipe. Since column pipe sections vary in length from 12 to 20 feet, there are 5-8 bearings for every 100 feet of shaft.length from 12 to 20 feet, there are 5-8 bearings for every 100 feet of shaft.“
( http://www.ragsdaleandassociates.com/WaterSystemsCertificati... )


“Corrosion and Encrustation in the Water Wells
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3.2.6 Column Pipe and Accessories
The first several metres of column pipe above the upper pump bowl, like the bowls themselves, arc subject to attach by highly acidic carbon-dioxide bubbles.
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Turbine pumps may be line-shaft driven by a motor at around level, or operated by a submersible motor. The first type of installation includes a wellhead and motor on the land surface from which a metal tube (column pipe) extends downward to support the pump and serve as a discharge conduit for the water. The pump consists of a series of impellers on a com-non shaft surrounded by an assembly of pump bowls (diffusers) with a suction pipe on the bottom and a column pipe at the top for conducting water to the surface. The line shaft which connects the pump and motor is centrally located within the column pipe by means of bearings held In retainers (spiders) anchored in the couplings of the column pipe.”
( http://books.google.rs/books?id=Cvt-CSAwwcsC&pg=PA8&lpg=PA8&... )