STRAINER BASKET:
The second line of defense is a basket at the pump. The holes in this
are smaller than those in a skimmer basket, and prevent the pump impeller
from clogging up.
STRATOSPHERE:
The second layer of Earth's atmosphere,
just above the troposphere, and below
the mesosphere. It is stratified in
temperature, with warmer layers higher
up and cooler layers farther down. This
is in contrast to the troposphere near
the Earth's surface, which is cooler
higher up and warmer farther down
SUCTION SIDE: The plumbing prior to and carrying water to the
pump. This side is
under vacuum pressure.
SUNBELT:
The
southern half of the United States where
freezing temperatures rarely occur, and high
temperatures are particularly common.
SUPER-CHLORINATION: Applying 7 - 10 times the normal amounts of chlorine to the pool as
an added "boost" for contaminant removal. Some refer to
super-chlorinating as
being less than shocking, in that breakpoint thresholds are not reached, or the terms may
be used synonymously.
TDS:
See
Total Dissolved
Solids
TEE: A plumbing fitting used to bring two pipes together into one, or vice-versa.
TEST KIT: A
method used to test the water balance and
sanitizing level of your pool water.
TIME CLOCK: A mechanical device that controls the timed operation of your electrical
equipment, primarily your filter and booster pumps.
TITRATION: A method of testing for total alkalinity, calcium hardness and acid/base
demand by adding a titrant, drop by drop until a color change is observed.
TOTAL ALKALINITY: The ability of the pool water to resist changes in
pH. The
"buffering" capacity of the water. Additions of Sodium Bicarbonate will increase
the levels, expressed in ppm.
TOTAL DISSOLVED SOLIDS
(TDS): A measure of everything that has ever dissolved in the
water; all the matter that is in solution. High TDS levels can oversaturated your water,
causing all sorts of reactions.
TRICHLORO-S-TRIAZINETRIONE:
a
chemical compound used as an industrial
disinfectant, bleaching agent and a
reagent in organic synthesis. This white
crystalline powder, which has a strong
"chlorine odour," is sometimes sold in
tablet or granule form for domestic and
industrial use.
TROWEL: A pool trowel is a flat-bladed tool with rounded ends used to apply viscous or particulate material coatings to concrete, especially on pool decks.
TURBIDITY: Cloudy, dull, hazy water, due to
micro particle suspension.
TURNOVER:
The amount of time it takes your pump to move all the water in your
pool through the filter and back again. Usually, pools are designed for an eight hour
turnover.
ULTRA VIOLET LIGHT:
Ultraviolet (UV) light is
electromagnetic radiation with a
wavelength shorter than that of visible
light, but longer than soft X-rays. It
is so named because the spectrum starts
with wavelengths slightly shorter than
the wavelengths humans identify as the
color violet (purple).
ULTRA VIOLET LIGHT TREATMENT: Using UV wavelength radiation to destroy
contaminants
in water. UV light is also used to create ozone molecules for the same purpose.
UNDERDRAIN:
The lower collection system in a
filter which directs filtered water
back towards the pool. It also distributes water in reverse during backwashing. See
laterals.
VACUUM: Refers to the low pressure condition created in the suction line. Also refers
to the cleaning process of sucking leaves, algae and debris from the pool floor.
VALVES: A device placed in the plumbing line which restricts or obstructs water flow to
create desired hydraulics, or may permit flow in one direction only (as in a
check
valve).
Vermiculite:
A natural mineral that expands with the
application of heat. The expansion
process is called exfoliation and it is
routinely accomplished in
purpose-designed items. Vermiculite is
formed by hydration of certain basaltic
minerals.
VENTURI: Increasing water velocity by restricting pipe size
usually accomplished by a spa jet.
