How to choose a water pump?

The question we at Garpen are often asked is what sort of pump should I buy?

There are so many options but to boil down what's the right water pump for you is to first know the intended use of it. How do you intend to use the pump? Is it for fire fighting, water transfer, perhaps to fill a 1,000 litre pod, or to transfer chemical or contaminated water? Depending on the application, you can then decide which material type of water pump is right for the application, and then the drive power type, water pressure, and so on.

Water pumps can be classified according to their application, material type, and fuel type. To help you with your buying decision, we're going to go through the types of water pumps.

 

Water Pumps By Application

Fire Fighting Pumps

Water Transfer Pumps

Chemical Pumps

Trash Pumps

Submersible Pumps

 

Fire Fighting Pumps

Fire Fighting pumps are versatile in they can be used for fighting fires but also transferring volumes of water. There are two types of firefighter pumps, Single Impeller and Twin Impeller. A twin Impeller is a high pressure and has less water flow volume than a single impeller. Put simply you can squirt water further with a twin impeller than a single impeller. This is because the higher pressure is put out. The engine-driven is not reliant on electricity which could disappear at any moment in a fire. Fire Fighter pumps are available in diesel and petrol engines at Garpen.

Water Transfer Pumps

Transfer Pumps are for moving volumes of water. At Garpen, we have transfer pumps that can pump from 20 Cubic meters of water per hour and above and are available in petrol or diesel These are ideal for pumping water from a dam to a truck or pumping out of a truck quickly and efficiently. These pumps are high volume and low pressure so always consider the height or head that you wish to pump to. For any assistance please call us to discuss further.

Providing Water to Buildings and Gardens

The most common is an electric type pump, with or without a jet. These pumps need to run for long periods and be ready on-demand, so being powered by your electricity grid is ideal. Garpen has a wide range of high-quality options for this.

Trash Pumps

If you are moving water that contains solids or debris then a trash pump is the ideal choice. They are designed to safely move water-containing solids like pebbles, leaves, and twigs (up to certain sizes). This makes them well suited to dewatering worksites and moving flood water. (note, the pump does not grind them up like a garbage disposal unit just simply passes them through)

Chemical Pumps

Some chemicals or contaminated water such as saltwater and effluent can be damaging to certain pumps. Chemical-resistant pumps are corrosion-resistant, such as plastic or stainless steel. If you need a chemical resistant pump it is recommended to determine which materials are safe. These are mostly used for agricultural and industrial chemicals.

Submersible Pumps

These pumps are utilized in pools,  irrigation, deep well, drinking water supply, and site dewatering. As the name suggests, this pump is completely submerged in the liquid. Like any other pump, it transfers liquid from point A to point B, however, the difference is that this pump operates by pushing, instead of drawing liquid, during the pumping process.

 

Pumps By Material Type

Now that you learned about the water pump types by applications. It is also worth considering the material types of the pump. Are you choosing the right water pump material? What material type is the pump built of will also determine what application it is great to use for.

 

Stainless Steel Pumps

Stainless Steel-made pumps are highly adaptable to various applications, particularly in harsh environments. Ideally used for chemical pumping. The pumps made with stainless steel hold up against solvents, acid, seawater, brine, and more. Stainless steel pumps are corrosion resistant which makes them reliable and durable for many water pumping tasks.

Cast Iron Pumps

While cast iron is perhaps the cheapest option available for the casing, water pumps made of cast iron are still high performers and a great choice for some applications. Cast iron pumps have thicker walls which makes them resistant to shocks and knocks, lower noise-level operation, easy to maintain and repair. These pumps are ideally used as general-purpose water pumps. 

 

Water Pumps by Fuel Type

Engine-driven pumps come in either diesel or petrol type. The choice of which fuel type pump is entirely depending on your personal preferences and again your intended use of it. Do you intend to operate it for an extended period of time? or perhaps just a domestic backup firefighter.  Petrol Powered pumps are generally cheaper to buy and can come in a wide range of models. While the diesel-powered pumps can be more expensive to buy initially but they consume less fuel which in turn can be cheaper in the long run. The diesel-powered pumps are ideal for use where operations require consistent and extended periods of time.

Now that you've learned the various types of engine-driven pumps by applications, material types, and fuel types, you can then narrow down your research on each pump's water pressure capacity, water lift, suction height, and water flow rate. 

Read our next blog about the water pump's important attributes and why they're important to consider in determining which pump is right for your needs.