Choosing the Right Pump for your Water Tank

Choosing the Right Pump for your Water Tank

July 22, 2018 0 By Saidul Hoque

If you are using a rainwater tank around your property you’re going to need to pump the water around using a purpose built pump. But which pump will be suitable for your need? This post is dedicated to giving you an idea of how to know which pump is right for your needs.


Things to Keep in Mind


Energy Usage

When purchasing your pump always consider the energy rating. If you are using your pump all the time it may add to your electrical bill considerably.



Water pumps can be noisy, so you want to keep it away from the house. That being said, there are a lot of whisper quiet pumps on the market that are barely audible. They cost a few extra bucks but are worth it, so you can get to sleep at night.


Switching Systems

If you are running duel water sources such as rainwater tanks and city water, you want to be able to switch between the two at will. Your pump should have a switching system, whether it’s auto or manual – it helps if it’s both.


Water Pumps and Pressure

How powerful your pump needs to be all depends on the what you are using it for. The higher the number of taps and outlets, the more pressure will be required to get water to those areas. Most pumps are rated on how many taps they will work effectively with, otherwise I will explain a little about pump head and pump flow rates.

Pump Head

Pump head is basically a standard for measuring how far your pump could pump a single outlet against gravity. Let’s just say we hooked a pipe to pump shooting vertically up in the air. This rating will tell you how far the pump will pump water straight up, until gravity takes its toll. In pump head measurement you will find the term “Rated Head” which means the optimal running point for that particular pump. This is the measurement you should be taking the most note of. They also use the term “Maximum Head”. This is the distance where gravity and the pressure of the pump intersect and signals basically the maximum point before there is no pressure.

Pump Flow Rate

Pump flow rate refers to how much water the pump can push through the pipes over a certain duration of time. It is usually measured in litres per minute and is a good indication of how powerful the particular pump is. The maximum flow rate is directly measured from the pump head itself and isn’t really a clear indication of the power. To get the real flow rate you need to take distance and slope into consideration. This will give you a better indication of what size pump you will need.


Other Things to Take into Consideration

Also, think about the use of the pump. Is it for showers? Showers generally disperse 15- 25 litres per minute. So if you are powering multiple showers, you might need to get a more powerful pump. Another way to combat this is to use water-saving pressure heads. This applies to taps and other fittings as well. You can take all the hard work off the pump by installing these water saving devices.

Also, take into consideration how many outlets there are. If a pump has to pump water to multiple outlets, it will work a lot harder. Also, keep in mind that you probably won’t be using all the outlets at once, so water pressure shouldn’t suffer too much.

So, when it comes time to buy a pump for your property take this advice into consideration before going to see your local pump supplier. You will be armed with valuable information so you can make an informed purchase to cater for all your water needs. Using rainwater tanks is great way to save on your bill and also makes for a nicer shower, so keep up the good work.

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