POE
: Point of Entry. A system installed where water enters the home.
Regeneration
:The process of restoring exchange capacity to a softener.
Resin
: For POE softeners, strong acid cation exchange beads operating in
the sodium or potassium form.
Sanitize
: The periodic addition of a sanitizing agent such as chlorine to
attempt microbiological control.
Service flow
: Process water flow rate through a POE system, often meas-
ured at the point of 15 psi lost.
Simplex
: Softener or filter using one media tank.
Upflow
:Direction of water flow against gravity through resin or filtration media.
Glossary of Terms
Automatic
: Softeners or back-washing filters that start regeneration via clock.
Backwash
:High velocity rinsing of softening resin or filtration,normally upflow.
Brine
: Salt solution used to regenerate resin.
Brine Tank
: Holds salt to make brine for regeneration.
By-pass
: Manually operated valves to divert flow around POE equipment,
or, automatic diversion of flow inside a controller for single tank POE
during regeneration.
Carbon
: Activated carbon found in POE equipment for dechlorination,
taste and odor reduction.
Combination System
: Duplex combination filter / softener system using
four separated media tanks and one control.
Countercurrent
: Direction of service flow and regeneration flow are opposite.
DIR
: Demand initiated regeneration.
Downflow
: Direction of water flow with gravity through resin or filtration
media.
Efficiency
: Referring to grains of hardness removed / pound of salt for a
water softener.
GPG
: Grains per gallon of hardness. 1 US gpg = 17.1 ppm of hardness as
CaCO3.
GPM
: Gallons per minute.
GPP
: Grains per pound (salt efficiency).
Macrolite
®
: Engineered ceramic filtration media.
Meter
: Device to measure flow to service from POE softener or filter for DIR.
Micron
: Micrometer (μm) for solid particle diameter.
Overdrive
: Parallel service flow
PPM
: Parts per million.
Peak flow rate
: Maximum design process flow for intermittent high
demand through POE filter or softener.
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Softening System Diagram
Regeneration Cycle
Indicator
Resin Tanks
By-Pass Valve
Control Valve
Brine Tank
