Pools Flashcards
How much decking do you need around a pool
Minimum four feet
Do pools have to have an enclosure
Yes, at least 48:” tall with not toe of footholds. Shrubbery is not approved
Do Spas require an emergency shut off
Yes if they’re Public
when do you know a pool’s filter needs to be cleaned
When the psi is greater than 10 between the effluent gage and the influent gage. The influent gage is typically on top of the filter
What does a pool test kit need to measure
PH
disinfectant concentration and
cyanuric acid
total alkalinity
What is the reagent that must be used in a test kit
DPD#1, N, N-diethyl p phenylenediamine. It turns pink in the presence of free chlorine
Why are variable speed pumps being used on pools
To conserve energy
What are the three types of filter media commonly used
Sand
Diatomaceous earth (DE)
Cartridge filters
How do you know what the water flow rate is of a circulation system in gallons per minute
All pools must have a flow rate meter
How do chlorine generators work
They use electrolysis to convert sodium chloride salt into free chloride
What are the three different forms of chlorine when dealing with pool water
Free chlorine, combined chlorine and total chlorine
Free Chlorine is the active disinfectant in the water
Why is cyaneric acid used in the pool
It helps to stabilize the free chlorine from degrading due to the effects of sunlight
Cyan Uric acid is most effective between what range
30 to 50 PPM, do not exceed one hundred ppm
What do you use to determine if your water is balanced
The saturation index and calculation if the result is between negative three and positive .3 the water is considered balanced
If it is greater than -0.3 it is corrosive if it is greater than .03 it will be scaling
What is the ideal free chlorine level for a pool and a spa
2.0 - 3 .0 ppm - Pool
3.0-5.0 ppm - Spa and wader
What is the ideal PH balance
7.4 to 7.6
What is the ideal cyanuric acid level
50 to 70 PPM
What is the ideal total alkalinity level
80 to 120 ppm
How many gallons is a cubic foot
7.5 gallons
How many liters is a cubic meter
1000 liters
What is the calculation for turnover rate
Volume / by flow rate /by 60 minutes per hour
What is the max temperature for a spa
104 degrees F
What’s the minimum chlorine level
1 PPM
