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34 Cards in this Set
- Front
- Back
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Surface Area Rectangle |
Length x Width |
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Surface Area Circle |
3.14 x Radius (squared) |
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Average Depth |
Add all different depths/ # depths |
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Volume |
SA x Avg Depth = cubic feet SA x Avg Depth x 7.5 = gallons |
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Occupancy of Pool |
Surface Area / 20 |
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Occupancy of Spa |
Surface Area / 10 |
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Surface Area Kidney Shape |
width a + width b x length x 0.45 |
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Area of D.E. Filter |
Length x Width x 2 (water enters from both sides of filter) x # Filter Panels |
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Filter Flow Rate Capacity |
Total Filtering Area (sq.ft.) x Filtration rate (gpm/sq.ft.) Pool Volume (gal)/ Total Flow Rate (gal/gpm) = Hours |
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Minimum distance from sewage outfall for swimming |
200 feet upstream 500 feet downstream |
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Backwashing |
Required for filters when there is 10 psi difference between pressure gauges |
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NH2CL (Monochloramine) |
Most prevelant in pool water Bad disinfectant Smelly Conjuctivitis, dermatitis, hair bleaching
NH3 + HOCL = NH2CL |
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HOCL (Hyphochlorous Acid) |
Good disinfectant
CL2 + H20 = HOCL + HCL |
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HCL (Hypchloric Acid/Muriatic Acid) |
Helps lower the pool pH balance. |
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NACO3 (soda ash) |
Helps raise the pool pH balance |
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Ortho Test |
Measures total residual chlorine |
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DPD (Diethyl-Phenylene-Diamine) |
Measures both free chlorine and combined levels More accurate than ortho |
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Bromine |
Better disinfectant than CL No Odor $$$$ |
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CuSO4 (Copper Sulfate) |
Used for persistent algae growth |
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Cavitation |
Rumbling noise of pump caused by erratic pressure gauge.
Air bubbles cause pitting to pump impeller.
Destroys the pump. |
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Feet of Head |
Pressure of resisting flow caused by the pipes and equipment. |
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Increase in the feet of head |
Results in reduction of flow. |
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Shut off head |
No flow pressure |
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Elevation |
Height & quantity water flows in a system. Affects the pressure of flow. |
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Required Filter Area |
Flow Rate/ Gallons Per Minute (GPM) per sq. ft. |
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Water loss |
Length x Width x (Loss in inches/12) x # of days |
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Power (watts) |
Volts x Amps |
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Title 24 |
Building Code |
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Title 22 |
Swimming Pool Regulations |
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Depth of Sample |
18 inches |
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Location of Sample |
Away from return outlets and skimmers |
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Sodium thiosulfate |
Removes CL from water sample to ensure accurate pH reading. |
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pH |
Ideal pH is 7.4 - 7.6 Legal pH is 7.2 - 8.0
-pH rises as temperature increases -as pH rises, CL becomes less effective -controls the speed and nature of chemical reactions in a solution. |
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sodium bicarbonate (baking soda) |
Raises the pH (similar to soda ash) |
