BEGINNERS AREA
Those water areas in pools, spas and hot tubs which are three feet (3) or less in water depth.
BILL OF MATERIALS (BM)
List of parts that are assembled into a pump at the factory
BINDERS
When used in reference to cartridge filters, refers to chemicals used to hold, or bind, short fibers together in a filter. Also may refer to various chemicals used to bind polymeric compounds in products such as plastic bottles.
BIOFILM
An aggregation of active, multi-layered microbes found on surfaces and in particular inside tubing and pipes. May be difficult to remove by chemical means due to multiple layers and lack of fluid dynamics at surfaces where it resides.
BLINDING
The fouling or plugging of pores in a membrane, usually by a gel-like substance. BOD Biochemical oxygen demand. BODY FEED The continuous addition of small amounts of filter aid during the operation of a diatomaceous earth filter.
BOOSTER PUMP
A pump that adds pressure to existing pressure in a water system. BOOSTER PUMP SYSTEM A system whereby one or more hydrojets are activated by the use of a pump which is completely independent of the filtration and heating system of a spa. In other uses it is generally a pump and pressure tank controlled by a pressure switch or other device.
BRACKISH WATER
Water containing between 1000 and 15000 mg/l of dissolved solids is generally considered to be brackish.
BRIDGING (OR SALT BRIDGING)
The caking of salts in a dry water softener tank which causes failure of the liquid or brine beneath the dry salt to become saturated. The net result of bridging is insufficient salt to properly regenerate the resin.
BRINE (Same as Reject Water):
One of two streams of fluids generated by a Distiller or Reverse Osmosis unit. It contains the impurities removed from the feed water. Characteristically, 30,000 to 300,000 ppm.
BROMIDE
A compound of bromine. Two of the salts, Sodium and Potassium Bromide, are sometimes used to produce a disinfectant or algaecide.
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BROMINE
An element which is sometimes used in pool water purification. A dark, heavy, reddish-brown liquid in its normal state. Closely related to chlorine.
CAPACITY
The amount of water a pump will put out or a tank will hold.
CARCINOGEN
Any substance, which tends to produce cancer in an organism.
CARTRIDGE
A replaceable porous filtering element.
CARTRIDGE - DEPTH TYPE
A filter cartridge with a medium not less than three-fourths inch (3/4) thick that relies on penetration of particulates into the medium to achieve their removal.
CARTRIDGE - SURFACE TYPE
A filter cartridge with a medium less than three-fourths inch (3/4) thick that relies on the retention of particulates on the surface of the cartridge to achieve their removal.
CATIONS
See ion.
CAVITATION
A condition that occurs in pumps when the water/liquid entering the pump is changed from a liquid state to a gaseous state and back to liquid that is generally caused by too high of flow rate or from pipe that is too small for the flow rate. The formation of vapor bubbles in areas of low pressure in a liquid.
CAVITATION DAMAGE
The pitting or wearing away of a solid surface caused by the collapse of vapor bubbles created by low pressure prior to the damage.
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