Fixing my leaking shower

Single-Speed vs. Variable-Speed Pool Pump: Which Is the Best Option for Your Pool?

by Andy Butler

If you are in the market for a pump, you will come across two popular configurations: single-speed and variable-speed pumps. Single-speed pool pumps operate at the full-rated horsepower speed, and you can't adjust it. Conversely, variable-speed pumps provide a range of speeds that allow you to fine-tune the motor to your varying needs. Below are three factors to consider when choosing between the two pump options for your residential pool.

Circulation and filtration efficiency

The primary role of a pool pump is to circulate water for proper treatment, heating and filtration. Thus, when considering these two options, examine the effect of each configuration on the pump's processes. Single-speed pool pumps operate at the highest possible speed, which means that the water is pushed through the filter quickly. The increased velocity of the water reduces the efficiency of the filtration process. Also, filtered water mixes too quickly with unfiltered water, thereby increasing filtration times.

Variable-speed pool pumps allow you to run the motor at variable speeds. You can operate the pump at a low speed to optimise the filtration process. At a low speed, most of the debris in the water gets trapped by the filter, which leads to improved water quality. Water circulates back into the pool at a slow rate. Thus, it doesn't mix with unfiltered water too quickly. Consequently, the effectiveness of the filtration process increases dramatically.

Energy consumption

Single-speed pool pumps run at the highest speed at all times, which can significantly increase their energy consumption. In an attempt to lower energy costs, homeowners may turn over the pool for a shorter time. Failure to run the pool at least eight hours a day can lower the quality of water and increase the risk of algae growth. Consequently, you will spend more money on chemicals and pool cleaning.

The different speed options offered by a variable-speed pump can save annual energy costs. At low speeds, the pump consumes less power while effectively circulating the water. Since there is no concern for high energy bills, you can run the pump for longer periods. This translates into improved water quality and lower pool remediation costs.

Quiet operation

When operating at full speeds, most pumps produce annoyingly loud sounds. Single-speed pumps only run at one speed; therefore, they are noisy all the time. You cannot run the pump at night, as it may disturb your neighbours. Conversely, at low speeds, pool pumps are a lot quieter. With variable-speed pumps, you can operate the pump at a low speed to reduce noise levels at night.

Variable-speed pumps offer better efficiency and performance than single-speed pool pumps. Consult your contractor to install a pump for you, such as a Davey pump.