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Houston Cool Pools
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Glossary • Letter L–O

Pool Glossary - L–O

An A–Z reference of pool and spa industry terms - chemistry, equipment, construction, water features. Written in plain English by a real Houston pool builder.

ABCD–EF–GH–KL–OP–RST–Z
L

11 terms

Lap Pool
A long, narrow pool, usually about four feet deep, for swimming laps.
Lateral
Usually a series of small perforated pipes at the base of a sand filter that forces water through the sand bed for filtration.
Leaf Net
Deep net attached to the end of a multi-purpose pole that skims surface debris.
Leaf Rake
Metal brush used to brush off the top of algae spores and allow chlorine to penetrate and kill them.
Main Drain
The grate at the bottom of a pool or spa - should be equipped as a dual drain with suction or with an anti-vortex system to avoid hair or body entrapment.
Modular Media
Large-capacity cartridge filter.
Muriatic Acid
Dilute hydrochloric acid used to lower pH level in pool water.
Non-Chlorine Shock
Does not contain chlorine but can oxidize organic waste.
O-Ring
Rubber ring used on equipment for a better seal. Example: the o-ring under the main circulation pump’s see-through lid.
Oxidation
Chemical process of burning up and eliminating ammonia compounds, nitrogen compounds and swimmer waste. A chlorine or non-chlorine shock may be used.
Ozone
Molecule containing 3 atoms of oxygen to oxidize the water. For pool sanitizing this product is called an ozonator.
H–KP–R

Houston Cool Pools

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