5600 Softener Piston Assembly 60102-00. Used on all Fleck 5600 softener valves since 1979. The color of the Teflon coating of the piston may be Green or Gray. It's only the top end plug that is color coded to help identify any difference between the various versions.
http://www.softenerparts.com/Piston_Assembly_5600_Softener_60102_00_p/346010200.htm
Types of Hand Water Pumps Include Shallow Well and Deep Well Piston Pumps. Some Pumps Offer Village Level Operation and Maintenance Capability. Types of hand water pumps include piston pumps used for shallow and deep wells.
http://www.clean-water-for-laymen.com/hand-water-pumps.html
Piston pumps can have more than one piston and set of check valves. A pump with two pistons and two sets of check valves would be called a duplex pump, one with three would be called a triplex pump, with five a quintiplex, etc. Piston pumps can be single acting or double acting.
http://www.pumpscout.com/all-pump-types/piston-pumps-ptid67.html
Because the pump cylinder is below the water table, a long pump rod has to reach down to the pump cylinder, connecting it to the pump handle. This complicates the maintenance process since the pump rod, the riser main, and the pump cylinder all have to be removed from the well, which can be hundreds of feet deep.
http://www.clean-water-for-laymen.com/hand-water-pumps.html
Well diameter. Wells larger that 100mm (4 in.) in diameter can accommodate most farm water pumps. Wells less that 100 mm (4 in.) in diameter limit the type of pump that can be installed. Normally, deep well piston pumps or specifically designed jet systems are used. Depths and distances.
http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex9364
Deep Well Pumps. As mentioned above, the pump cylinder on a deep well pump (or any lift pump) is placed below ground and below the water level. The piston assembly containing the piston valve is connected to the pump handle by a pump rod (connecting rod).
http://www.clean-water-for-laymen.com/hand-water-pumps.html
Also, used on some Fleck 5600 Filter Valve applications instead of the longer backwash Filter Piston version ( 60102-10 ) with the black end cap. And there is a Low Water version ( 60102-20 ) with the gray end cap ( used mostly on city water in California ) and not recommended on well water.
http://www.softenerparts.com/Piston_Assembly_5600_Softener_60102_00_p/346010200.htm
The power to drive the piston is supplied by an electric motor, internal-combustion engine, or other power source - although more primitive piston pumps may be driven by hand, wind, or flowing water. The motion behind the piston is usually rotational.
http://www.pumpscout.com/all-pump-types/piston-pumps-ptid67.html
Re: Piston water pumps - why are they better? Piston pumps are not better or worse, depends on the application. Piston pumps can pump very long distances and/or to very high elevations. One system we sold a few years ago with a Dankoff pump sent water 1300 verticle feet up the side of a mountain from a small spring. 0. Posts: 593Solar Expert.
http://forum.solar-electric.com/discussion/9489/piston-water-pumps-why-are-they-better
Lift pump. In a lift pump, the upstroke of the piston draws water, through a valve, into the lower part of the cylinder. On the downstroke, water passes through valves set in the piston into the upper part of the cylinder. On the next upstroke, water is discharged from the upper part of the cylinder via a spout.
https://en.wikipedia.org/wiki/Piston_pump
what is the piston on a water well
The piston on a water well is a piston assembly containing the piston valve connected to the pump handle by a pump rod.