A filter tank, usually fiberglass or ABS plastic, filled with sand and gravel. The pump diffuses water over the top of the sand bed, and forces it through the sand and into the laterals on the bottom.
A chemical agent used to remove unwanted contaminants.
Usually whitish in color, scale forms on pool surfaces and equipment when mineral salts are forced out of solution. A scaling condition is one in which calcium hardness, pH and/or alkalinity levels are out of balance.
A scroll compressor uses two interleaving scrolls to pump, compress or pressurize fluids such as liquids and gases.
A sequestering agent ties-up minerals tightly in solution, preventing their precipitation, which colors the water and/or stains the pool. Synonymous to chelators, these are commonly called stain & scale chemicals.
As a noun it loosely describes the products used in shocking swimming pool water, such as hypochlorites, sodium persulfate, potassium monopersulfate or hydrogen peroxide. As a verb it describes the act of bringing the sanitizer level up so high that breakpoint chlorination is reached. When breakpoint is reached, contaminants in the water are oxidized away.
Shotcrete is concrete (or sometimes mortar) conveyed through a hose and pneumatically projected at high velocity onto a surface, as a construction technique. Shotcrete is usually an all-inclusive term; gunite is a term sometimes used for some dry-mix types.
A surface skimmer is a plumbing fitting set at water level, containing a weir mechanism and a debris basket. The skimmer is part of the suction side circulation system.
Beneath the skimmer lid, the basket strains debris, as the first line of defense in filtering the water.
Attached to a telescopic pole, a leaf rake is a very useful tool in keeping the pool clean. Also called a skimmer net are the flat dip and flip nets, which aren't as useful.
A base, used to counteract an acidic condition by raising pH.
Another base; however its properties will increase alkalinity more than pH. Used to raise Total Alkalinity levels.
A granular form of acid, used to counteract a scaling condition by lowering pH and/or alkalinity.
A granular form of chlorine that is stabilized with cyanuric acid. Used for shocking and super-chlorination.
Liquid chlorine used in pools, identical yet stronger than Clorox bleach.
A chemical used with a new technology that renders algae incapable of processing carbon dioxide, which they need to live.
Water that has low calcium and/or magnesium content. Soap lathers easily in soft water.
Black mats of miniature plastic tubes through which water is pumped, absorbing the heat as it passes through. These mats are roof mounted with up & down plumbing connecting it.
Refers to the origination of electrical power. The source for your filter pump (load) is probably a timer clock.
A filtered, hot water vessel with hydrotherapy jets and air induction. Can be portable or installed permanently. Jacuzzi is a brand name.
See Cyanuric Acid. Stabilizers, also called conditioners, can be added directly to your pool to extend your chlorine efficacy. Cyanuric acid is already added to certain stabilized products such as Trichlor tablets and Sodium Dichlor.
Also see: CYANURIC ACID
Vertical pipe that carries water from the hub and lateral assembly to or from the multiport valve on a top mount sand filter.
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.
Also see: PUMP STRAINER BASKET
The plumbing prior to and carrying water to the pump. This side is under vacuum pressure.
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 effective than shocking, in that breakpoint thresholds are not reached, or the terms may be used synonymously.