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Pool Glossary
(cont.)
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FLOW
RATE: The quantity of water
flowing past a specific point in a specified
time (e.g. the number of litres flowing through
the filter in 1 hour).
GATE VALVE:
The type that spins "lefty-loosey; righty-tighty."
GAS VALVE: An electronic valve in the pool heater that directs gas flow from the meter
to the pilot and the burner tray.
GASKET:
A gasket is a mechanical seal that fills the
space between two objects, generally to prevent
leakage between the two objects while under
compression. Gaskets are commonly produced by
cutting from sheet materials, such as gasket
paper, rubber, silicone, metal, or a plastic
polymer.
GROUND-FAULT
CIRCUIT-INTERRUPTER: A GFCI device protects a circuit from branching off
by de-energizing the path of electricity very quickly when it senses current loss. An
important safety device around water (the pool?).
GROUT: a construction
material used to embed rebars in masonry walls,
connect sections of pre-cast concrete, fill
voids, and seal joints (like those between
tiles). Grout is generally composed of a mixture
of water, cement, sand and sometimes color tint
which is applied as a thick liquid and hardens
over time, much like mortar.
GUNITE: A dry mixture of cement and sand mixed with water at the "gun"; hence
the name. A gunite operator "shoots" the pool's rough shape, while finishers
trowel after.
HALOGEN:
A member of the family of elements fluorine,
bromine, chlorine and iodine.
HARD WATER:
That water which is high in calcium hardness and
other salts which, as such, resists soap being
lathered.
HAZMAT:
A hazardous material, a
term used almost exclusively in
the United States, is any solid,
liquid, or gas that can harm
people, other living organisms,
property, or the environment.
Hazmats may be radioactive,
flammable, explosive, toxic,
corrosive, biohazardous, an
oxidizer, a pathogen, an
allergen, or may have other
characteristics that render it
hazardous in specific
circumstances.
HEATER: A device used to heat the water. It may be electric, fuel operated or solar
powered heat.
HEAT EXCHANGER: A set of 8 or 10 ribbed copper tubes that absorb the heat produced
below it and transfer it to the water cycling through its tubes.
HEAT PUMP: The antithesis of the air conditioner, the heat pump's cooling coil removes
heat from the air while the condenser coil transfers it to water cycling through it.
HOT TUB: Usually considered a circular, wooden vessel filled with heated and circulated
water.
HP: Horsepower (hp) is the
name of several non-metric units of power. The
most occurring conversion of horsepower to watt
goes 1 horsepower = 745.7 watts.
HYDROXIDES: the most common name for the
diatomic anion OH−, consisting of
oxygen and hydrogen atoms, usually derived from
the dissociation of a base. It is one of the
simplest diatomic ions known.
HYPOCHLORITE: A family of chlorine compounds such as Calcium Hypochlorite and Lithium
Hypochlorite, both granular, and the liquid Sodium Hypochlorite. When these compounds
contact water, they release Hypochlorous Acid, the active sanitizing agent.
HYDROSTATIC PRESSURE: A force involving built up ground water which creates upward
pressure beneath the pool shell.
HYDROSTATIC RELIEF VALVE: Fitting(s) installed in the floor of the pool designed to
manually or automatically release hydrostatic pressure beneath the pool by allowing ground
water into the pool.
IMPELLER: The rotating vanes of a centrifugal pump; its action creates the flow of
water. The impeller is shaft driven by an electric motor.
INFLUENT: The water coming into and up to the impeller from the suction lines. These
pipes are under vacuum pressure.
ION:
An
atom, or group of atoms that possess an
electrical charge.
IONIZER: An
ionizer is a device mounted
on your return line, and through which water flowing will receive charged metal ions.
Manufacturers may use a copper anode and/or silver. Copper is an algaecide
and algaestat, while silver is known for its properties as a bactericide.
This electric, limited technology has been replaced by the Vision System.
IRON: Usually introduced into the water from iron plumbing or from well water, Ferric
Iron can
stain surfaces, while Ferrous Iron will turn your water a
clear green color. |
