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Swimming Pool Pumps & Motors - An Intro
- What Does a Swimming Pool Pump & Motor Do?
- Sizing Your Swimming Pool Pump
- How Swimming Pool Pumps Work
- Priming Swimming Pool Pumps
- Standard Pool Pump Circulation Rates
What Does a Swimming Pool Pump & Motor Do?
The swimming pool pump & motor, commonly referred to as the pool pump, is one of the most important parts of the swimming pool. Just as it would be impossible to swim in a pool without water it would be impossible to keep that water clean without proper circulation and filtration. Basically, the swimming pool pump is the piece of equipment that draws water out of, and pushes water back into, your swimming pool. The pipes and additional pieces of equipment, known as plumbing, that the water passes through after leaving the pool, will determine the size and power of pool pump & motor you will need. For that reason, the most important issue involving swimming pool pumps is sizing your pool pump correctly. If this task is carried out successfully, your swimming pool will run at an optimal level and you'll experience fewer problems, easier maintenance, lower utilities costs, and longer equipment life.
Sizing Your Swimming Pool Pump
Sizing the swimming pool pump that is right for your pool involves calculating the following information:
- Pool Volume
- Capacity
- Flow rate
- Total Dynamic Head
These four factors are described in greater detail in the article: How To Size Your Swimming Pool Pump & Motor. Once you are able to determine the flow rate you need you can be confident to select the swimming pool pump that is right for needs. When choosing a pump you should also make yourself aware of some of the features and terminology used to describe swimming pool pumps.
How Swimming Pool Pumps Work
When looking to purchase a swimming pool pump you may run across some scientific-sounding terms that may make things sound more complicated than they really are. Here we will cover just how pool pumps work and describe the meanings of some of these terms. We all know that swimming pool pumps move the water in our swimming pools but just HOW that task is accomplished is a different matter. First, water is drawn from the pool through a hose called the influent line. The influent line leads into the pump where water is usually passed through a strainer basket and on to the impeller. The impeller, a rotating piece of the pump that is attached to the electric motor shaft, creates centrifugal force by spinning. This centrifugal force, meaning the outward movement of the water caused by the impellers rotation, is what forces water out through the hose leading to the next piece of equipment (usually the pool filter). This hose is called the effluent line.
Priming Swimming Pool Pumps
The word prime as referred to in pool pumps is the act of filling the influent line with water so that the pump, once started, fill force any air in the lines out the effluent line. If a pool pump fails to prime or does not prime completely, air pressure will keep your pool pump, and the rest of your filtration and plumbing, from working correctly. All inground pool pumps must be self-priming as the pump usually sits above water level. Although many above ground pool pumps are also self-priming, some are not, allowing the water that inevitably drains from the pool into the influent line and thus to the pump, to prime the pool pump.
Standard Pool Pump Circulation Rates
The industry standard efficiency for a swimming pool pump and motor is the capacity to circulate the entire volume of pool water in 8 hours. Therefore, whichever pump you choose, will need to have this capacity for proper circulation, and thus filtration, etc. How the specification of your pool plumbing determine the size pool pump you need is talked about in more detail in the article: How To Size Your Swimming Pool Pump & Motor. Read the article to determine the flow rate necessary for your application.
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