Pumps play many roles in water treatment. They move water from one place to another, and they provide added pressure that's sometimes needed to perform treatment functions. Pumps are used to inject water treatment chemicals, to supply compressed air, and to move treated water to its point of use.
A reverse osmosis booster pump increases the pressure of water entering the system, improving both the product/reject efficiency and the quality of the product water.
A demand pump looks much like a booster pump, but it's installed after the system to move water over a distance or from a low-pressure source.
A permeate pump is a non-electric device that uses the power of the brine (waste water) to pack the permeate (product water) into the storage tank.
A permeate pump will improve the efficiency and tank storage of a reverse osmosis system. Since the unit does not have to push against the pressure of storage tank, the ratio of product water to waste water improves significantly.
For whole house reverse osmosis, a Grundfos repressurization pump functions as a much larger version of the undersink demand pump: it delivers water on demand to homes and other large applications.
The pump has its own built-in pressure tank to assure smooth, instant delivery of water without the added pressure tank that is normally used with well pumps.
A small air pump injects air into a treatment tank, oxidizing iron and hydrogen sulfide to make them more easily removable by filtration.
Aermax air pumps are quiet, dependable, and economical to operate.
Chemical/mineral feed pumps are among the most effective, versatile, and cost-efficient of water treatment devices. Depending on the chemical agent used, the same equipment can treat bacteria, iron, manganese, low pH, hydrogen sulfide (rotten egg smell), and many other water problems.
A Practical Guide to Water Treatment Pumps
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(whole house & well units)