L I M I N I O I P I Q I R I S I Sta I T I U I V I Vol I W I Z
loop of elastomer in a round "O" shape that is used as a mechanical seal or gasket. They fit in a groove and are compressed during the assembly of two or more parts, which creates a seal at the interface.
OTO: A way to test for free available chlorine levels in a swimming pool. Usually comes in the form of a test kit.
OXIDATION: The "burning
up" of organic waste and compounds
in the pool water. It also refers to what
you may see on your metal pool surfaces
if your water is corrosive. Rust is a form
of this kind of oxidation.
molecule containing three atoms of oxygen;
known to be a very powerful sanitizer.
Ozone producing equipment creates this
molecule by UV radiation or corona discharge
scale of relative acidity or alkalinity,
expressed in logarithmic numbers from
0 - 14, with 7.0 being neutral. What's
really being measured is the hydrogen
ion concentration. Some would say pH
stands for Power of Hydrogen.
common type of interior finish applied over
the concrete shell of an in-ground swimming
known as a "toilet jack," is
a flexible auger used to remove clogs in
plumbing that cannot be loosened with a
plunger. Most devices consist of a coiled
metal wire with space between the coils
at the end. The other end is attached to
a device with a crank that rotates the
wire as it moves down into the pipe. Drains
are cleared by one of several mechanisms:
auger end of the wire digs itself
into the clog much like a corkscrew,
allowing retrieval of the object
causing the clog when the snake is
pulled out. (Commonly hair, combs,
small toys, cloth.)
end of the snake breaks up the object,
allowing it to pass through the drain.
(Commonly tree roots, foam insulation,
snake flails around the inside surface
of the pipe, scraping off accumulated
matter (ranging from mineral deposits
to bacon fat) which was reducing
the effective interior diameter of
the drain pipe.
auger should be turned clockwise only,
unless it has become jammed in the drain.
Not only is this essential for retrieval
of foreign objects, but for the longevity
of the cable.
sliding disc assembly that changes valve
position in a push-pull valve. For example;
up for backwash, down for filtration.
PERMONOSULFATE: See non-chlorine
algaecide / algaestat made up of
repeating polymer molecules. Used for
green algae and available in varying
per million. A method of assigning
value to certain concentrations of
chemicals in the water. For example,
alkalinity should be kept at 80-120
parts per million, by weight and in
relation to the water it's dissolved
precipitate is to come out of
solution; become insoluble by result
of chemical action. Material forced
out of solution, purposefully or
accidentally, will then settle,
stain or scale, or remain suspended
in the water.
CHECK: A test for the rate of water flow; also a test for
leaks in plumbing by placing a line in question under pressure and
waiting for the pressure to drop.
GAUGE: A device indicating pressure in a filter system.
Provides a determination of how the system is operating, and informs
us when service is required.
SIDE: The return side of the
plumbing. The section from the pump impeller
towards the pool.
SWITCH: A switch used in pool heaters which opens when
the flow rate is insufficient for safe heater operation. This disrupts
the circuit in the heater, preventing it from firing.
mechanical wet-end, powered by an electric
motor, which causes hydraulic flow and
pressure for the circulation of the pool
STRAINER BASKET: A
device placed on the suction side
of the pump, which contains a removable
strainer basket designed to trap
large debris in the water flow without
causing restriction. Sometimes called
a Pump Leaf Trap.
PUSH-PULL VALVE: A two position
valve used for backwashing sand or DE
PVC: Polyvinyl chloride,
which is used to make flexible and rigid
PVC pipe used for pool plumbing.
AMMONIUM COMPOUND: A type of
algaecide composed of ammonia compounds. Quaternary
Ammonium Compound is an effective
algaestat for green and blue/green algae.