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IMPELLER
The rotating member of a pump. The part of the pump that moves the water.
INFLUENT The water
entering the pump, the filter or other equipment of space. Water going into the
pump is called influent, while water leaving the pump is called the effluent.
INFLUENT LINE The plumbing
line that leads from the pool or spa to the equipment. Also known as the suction
line.
INLET A fitting in the
pool or spa on the water return line from the equipment that water returns to
the pool. Usually the last thing on the return line.
IONIZER
(chemical related)
A water-sanitation device that uses electricity to generate metal ions, which
are dispersed in the water. It works by passing a low-voltage DC current through
a set of metallic (usually copper and silver) electrodes placed in line with the
circulation equipment. The copper is an algaecide, while the silver is a
bactericide. Does not remove swimmer waste. Ionizers may be used as part of a
water treatment program along with chlorine or bromine.
IRON
(chemical related)
Iron in water causes the water to be brown- or green-colored. Can be controlled
by the addition of a sequestering agent or a chelat- ing agent. Water can be
tested with an iron test kit.
ISOCYANURATES
(chemical related)
Also called stabilized chlorine - A family of chlorine pool sanitizers that
contain conditioner (cyanuric acid or isocyanuris acid) to protect the chlorine
from the de- grading UV rays in sunlight. The most common types are sodium
dichlor and trichlor. The granular form is dichlor, which is fast- dissolving
and can be used for regular chlorination or super chlorination by broad- casing
into the pool or spa. Tablet or stick form is trichlot (which is usually used in
a chlorine feeder - either the floating type or the in-line erosion type) used
for regular chlorination only.
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