N.E.M.A. are the initials of the National Electrical
Manufacturers Association. The “NEMA” rating refers to the physical dimensions,
electrical characteristics, and/or class of insulation used in building a motor.
The practice of building motors to NEMA specifications insures the purchaser of
getting what they paid for and meet the specifications they need regardless of
the manufacturer producing it.
A chemical used to make chlorine or bromine harmless. Used in test kits to
counteract the bleaching effect of the chlorine or bromine in order to increase
the accuracy of pool water tests. Sold as chlorine and bromine neutralizer, it
is used to destroy excessive amounts of chlorine or bromine, so the high levels
will not affect swimmers.
A gas that causes algae to bloom and disables chlorine. It is brought into the
water each time it rains. Maintaining proper chlorine levels will prevent
nitrogen from becoming a problem. Super chlorination will remove nitrogen and
its related compounds.
A term given to a class of chemical compounds that are used to oxidize or shock
the water (destroy ammonia, nitrogen and swimmer waste). They contain no
chlorine or bromine and do not kill living organisms. Swimmers may re-enter the
water in only 15 minutes after adding a non-chlorine shock.
NORYL The brand name for a
thermoplastic resin used in the manufacture of certain pump components and
various other pool equipment fittings.