The secret to a healthy swimming pool is about choosing the right sized pump. A pump is essential as it ensures that the water in the pool remains fresh and is free from contaminants and residue which can lead to bad odor or can pose a risk to people’s health.

It is common to see pool pump suppliers misleading buyers and making them buy an inappropriately sized large pump. Some suppliers push a larger pump to the buyer under the pretext that it is good for filtration and will render better cleanliness to the pool. However, this is not the case, as larger than desired pool pumps could sometimes do more harm than good.

barmera-lr-kids_swimming-largeA right pump size will not only ensure that you spend just the right amount buying it, but also help you run your swimming pool maintenance-free for a longer period. Besides, it will also lower your operational costs. The various factors to be considered while buying a pump for your swimming pool include –

1)     Volume of your pool

You need not be a genius to know the volume of your pool. If the pool surface is rectangular, the volume is L * B * D where (L) stands for length, (B) breadth and (D) for the average depth of your pool. To calculate the average depth, just divide the minimum and maximum depth in your pool by two. If the pool is circular, the volume is ∏r2d, where d is the average depth of the pool and r is the radius of the pool.

2)  The pump flow rate required for your swimming pool

If your swimming pool has a water volume of 50,000 gallons, and the filter needs about 8 hours to clean all the water in your pool, then your pump has to have a pro rata capacity. The pump capacity should be such that it delivers only as much quantum of water as the filter can comfortably manage to clean. If the pump is delivering excess water to the filter, the filter may get damaged.

For a 50,000 gallons swimming pool, the pump capacity or flow rate should at best be 104 gallon per minute (50000 gallons / (8 hours * 60 minutes per hour) so that just the right quantity of water reaches the filter at any point in time.

Besides the filter, the other constraint that decides the capacity of your pump is the size of the intake pipe that takes water for recirculation. The flow rate should only be such that the size of the pipe can carry along without breaking. The cross-section of the pipe would determine the flow rate it can safely accommodate.

3)  Other Aspects to be mindful while choosing a pump

a) Energy rating The pump you choose to buy should have a minimum 5 star energy efficiency, which will help you significantly lower operating costs. If you buy 8 star-rated pool pumps it will help you save 75 percent energy costs.

b) Electricity tariffs – If electricity tariffs at your place are lower in off peak hours, you can look forward to buy a pump that is quite to run. This will allow you to run it in off peak hours without violating the noise restrictions.

c) Speed controller – Choosing a variable-speed pump with an automatic controller can help you get better efficiencies. Such pumps come with a digital control that helps them to be programmed for specific jobs. It will automatically switch to lower or higher speeds depending upon the requirement – filtering, heating, spa, or cleaning.

Wrap up

Pump operating efficiency is very critical to your buying decision as pool pumps can take up as much as 70 percent of your pool energy needs and it is best optimize this. Besides buying a right sized pump you can also look to improve your pump efficiency by looking to increase the size of the filter and the cross section of intake pipes.