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Pool & Spa Pumps

 

Why?

A swimming pool pump is central to the health of your pool water and is therefore an important purchase. A pool pump must pump water efficiently through a system of pipes and ensure a suitable delivery of water through the filtration system. A correctly sized and operated swimming pool pump will provide the most cost effective method of providing clear, clean and healthy pool water. 

 

How they work

A pool pump is essentially an electric motor which drives an impeller within the pump chamber. The spinning impeller enables the pump to draw water from the pool and pump it through the filtration system and back to the pool.  A series of strainers and ancillary equipment may also exist in the circuit. The pump must overcome all the friction losses through the pipe work and through all the other items of equipment in the circuit. It is because each pool has different plumbing and equipment configurations that makes, choosing the correct pump so important. 

 

How to Choose

The first thing to consider when choosing a pool pump is, is it for a new pool or is it for an existing pool with an existing filter system.

 When building a new pool, the first equipment item of consideration should be the size or flow rate of the pump. The other pieces of equipment such as the filter are then sized to match the pump.

When replacing a pump on an existing pool, you must consider the design or flow rate of the existing filter. In this case you must size the replacement pump to the filter.

Now that this criterion is established, we can provide information for both scenarios. 

 

Choosing a Pump - New pool or where both pump and filter are being replaced

Calculate the pool volume – Length (m) x Width (m) x Ave Depth (m) x 1000 = Litres.

Calculate the minimum required flow rate of the pump in Litres per minute (LPM) to achieve the industry standard of two water turnovers per day.

Pool Volume (Litres) divided by 480 = Minimum LPM Flow Rate.

Example:

Pool Volume = 50,000lts    50,000 divided by 480 = 208 LPM (approx.) 

When considering variable or multispeed pumps, ensure the pump chosen has the ability on full speed to achieve the recommended LPM as calculated. 

 

Choosing a Pump – Existing pool where the existing filter is not being replaced

Find the design or maximum flow rate of the filter on the label or ask the manufacturer if possible. If you can obtain this information, choose a pump with a flow rate that best approximates the ideal. Pumps on the Buy and Fit website have some general information that will help you choose. 

If all else fails, Contact Us Here and we will assist you.

 

If you cannot find a pump listed on our website, Contact Us Here or call (03) 9439 9214. 

 

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