- Help Center
- Pool Operation 101
- General Information
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Certified Pool Operator Class (CPO)
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Coronavirus (COVID-19)
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Engineering Data/Calculators
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Pool Operation 101
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Pool & Spa Chemical Controllers
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Pool & Spa Boilers
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Pool & Spa Heaters and Heat Pumps
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Pool & Spa Calcium Hypochlorite Feeders
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Pool & Spa Liquid Chlorine/Acid Feeders
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Pool & Spa Salt Systems/Chlorine Generators
- ChlorKing ChlorSM Series
- ChlorKing ChlorPDS Multi-Pool Controller
- ChlorKing ChlorVFS Multi-Pool Controller
- ChlorKing ChlorVFSD Multi-Pool Controller
- ChlorKing Nexgen 60 Month Maintenance Schedule (All Models)
- ChlorKing Nexgen How-To Videos (All Models)
- ChlorKing Nexgen pH 10/10R
- ChlorKing Nexgen pH 20/40/60/80
- ChlorKing Nexgen pH 50/100
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Pool & Spa Filters
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Pool & Spa Filtration/Feature Pumps
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Pool & Spa Water Chillers
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SDS Sheets
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UV Systems
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VivoPoint Tutorial
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Water Safety Month
How a Pool Works
How a Pool Works
Pool circulation systems work much like the body’s circulatory system. Water is drawn from your pool by the powerful suction created from the pump.
- The pump draws the water through the skimmers and drains, removing large debris during the journey.
- When the pump’s impeller is reached, pressure forces water through the filer, catching any debris not caught by skimmer baskets.
- Water is treated and heated before it is returned to the pool.
With so many moving parts, maintenance is key to keeping your pool circulation system at optimal performance.

Water is drawn from your pool from the suction created by the pump. The pump generates pressure and returns the water to the pool, passing through the filter, then the heater, and the chlorinator.
*Hayward.com