Pool Cert Flash 2. Recirculation Flashcards
What are the typical components of the recirculation system?
Piping, pump, valves, inlets, outlets, surge tank, pressure gauges.
What are inlets and how should they be configured?
Fittings through which filtered water enters the pool. Direct them to produce uniform circulation (dead spots often found in corners, on stairs or ledges, and in deep ends).
Name some types of outlets?
Main drain, skimmers, and perimeter overflow system or gutters. (Maintain grates securely over outlet drains to prevent swimmer entrapment).
What is a surge tank (balance tank) and where is it used?
A storage tank that collects surge water caused by a large number of people entering the pool at once and sent to the filter as needed. Surge water may also be collected by vacuum filter tank, perimeter overflow system.
What is the flow rate of water passing through the pump dependent on and what is it measured in?
Resistence of the water flow due to bends and curves in the pipes and debris in the filter. This resistance pressure is measured in Feet of Head.
What is a flowmeter and what is its purpose?
Measures pressure differential across calibrated oriface and indicates the rate of flow at that point, usually measure in Gallons per Minute.
What are the requirements for turnover for Diving Pools, Wading Pools and Areas and Plunge Pools and Areas and Lazy Rivers, and for all other Pools?
Diving Pools - 8hrs or less (3 or more per day). Wading, Plunge and Lazy Rivers - 2 hrs or less (12 or more daily). All other pools - 6hrs or less (4 or more daily)
What is a Pump Curve and what does it pertain to?
Provided by the pump manufacturer as a diagram to compare gauge readings (converted to Feet of Head) to to ensure proper operation. Required to be available at the pool.
What type of gauges are used on the pumps and where are they located?
Vacuum Gauge (in. Hg) or Compound Gauge (in. Hg and psi) on Suction-side. Pressure Gauge on the Discharge-side of pump.
What is the equation to determine Total Feet of Head?
Discharge Pressure (ft. of Head) - Suction Pressure (ft. of Head) = Total Head
What is the process of pumping water from the pool through the filter system and returning it back to the pool?
Recirulation
A what pump is commonly used to recirculate the pool water:
Centrifugal Pump
The resistance or pressure of the water flow due to bends and curves in the pipes and debris in the filter is measured in what?
Feet of Head
A what measures the rate of flow of the water passing through the recirculation system.
Flowmeter
How do you calculate the turnover (in hours) for a pool?
Turnover = Volume of Water (gallons) / Flow Rate (gal per min.)
