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Permanent Pool:
A pool that cannot be readily disassembled, usually used to describe an in ground pool.
Above-Ground Pool: Removable pool on the ground that is between 36 and 54 inches deep. Product suggestions: San Marino 15' Round 54" Stainless Steel with 9" Toprail, Bella 15' Round 52" Steel Pool with 8" Toprail, Alta 15' Round 48" Steel Pool with 6" Toprail.
On-Ground Residential Pool: Removable pool that is on the ground and also has an excavated area below the earth.
In-Ground Pool: Pool where sides rest in part or fully within the earth.
Splasher: 2-3 foot deep pool.
Wading Pool: Pool that has shallow depth for wading.
pH:
A measurement of water acidity or alkalinity (indicated by the hydrogen ion concentration) using a scale of 0 to 14. 0 is most acidic, 7 is neutral, and 14 is most basic. A swimming pool should have a pH of 7.2-7.6. This is best controlled with pH increaser available in 5, 10 and 25 lb buckets and pH reducer available in 6, 15 and 30 lb buckets.
Phenol Red:
A pH indicator that causes the color of a solution to change depending on the pH balance.
Plaster:
A mixture of cement and aggregate used as an interior finish on concrete pools or spas.
Pool Shock:
The unstabilized chlorine made up of about 65% chlorine (with a ph of around 11) used to break down water-soluble organic matter. Product suggestions: Blast Out, Blitz, Burst.
ppm (Parts Per Million):
The standard measure of total dissolved in one million parts of pool water.
Pre-Coat:
The coating of filter aid on the septum of a DE filter at the beginning of each filter cycle.
Pressure Side:
The section from the pump impeller towards the pool (also referred to as the return side of the plumbing).
Pressure 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 pool heater, preventing it from firing.
Public Pools:
Pools that are operated by an owner, lessee, operator, or anyone else, regardless if there is a fee for use.
Class A: Intended for competitive aquatic events.
Class B: Intended for public recreational use.
Class C: Operated by hotels, motels, apartments, condominiums, etc.
Class D: Medical treatment, therapy, exercise lap swimming, wave or surf action, activity pools, splash pools, kiddy pools and play areas.
Pump:
A machine that causes flow and pressure for pool filtration, pool heating, and pool circulation. Product suggestions: Sta-Rite Pump, Hayward Super Pump.