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When you’re on the lookout for a water blaster, you’ll need to assess which one’s the best for you, with respect to your requirements, and how to assess them. As experts in the field of water blasters and pressure washing services in Christchurch, this article will list down the best water blasters for you.

There’s no question about it. Using a water blaster for your property can give you amazing results, provided you know how to use one effectively. For one thing, they’re proven to be very effective for quickly removing stubborn dirt from your driveway. They’ll also help make your weatherboards look as good as new.

However, not all water blasters function in the same manner. The options range from battery-powered models to bigger ones that are ideal for use in big corporations and organizations. Making sure you get the right model as per your needs is also important. But if you go over the top, you’re going to end up spending more money than you need to. Whereas on the other hand, if you underdo it, you may not end up wasting money and other resources (like your time). 

So, how to decipher which water blaster is right for you? To answer this we’ve typed out this blog post and highlighted pointers to make the decision easier for you. 

What should you consider before buying a water blaster?

The most important thing to think about before you buy a water blaster is what you will use it for. You need to pay attention to the water pressure of your model, which is measured in PSI (Pound-force per square inch) before you decide if it’s right for your needs. You can use a low-psi water blaster to clean up around the house. If you have a long driveway or a bunch of pavement, you might want something that has a little more power to hasten the job effectively. 

Water blasters can be powered by battery, electric, or petrol motors as well. Here are a couple of factors to consider:

  • While battery variants provide portability and mobility, they are often less powerful. They tend to have a shorter lifespan (about 15 to 20 minutes) and a lower level of power (often a psi of only around 300). As a result, they are only suitable for little tasks like washing windows or outdoor furniture.
  • Electric variants have more power and are suitable for every household task. These types of water blasters can be used for a variety of domestic tasks, including cleaning dirt off pavement and properties.
  • When it comes to power and capability, the gasoline-powered versions rule the roost. For commercial use, high-power variants are quite popular. While certain models may be suited to a wide range of household tasks, others may not.


The following are additional considerations for a petrol-based blaster:

  • Costs of fuel, oil, and upkeep
  • Cost of maintenance
  • Ventilation (petrol models emit exhaust fumes)
  • Noisiness

Things to consider while purchasing or renting a water blaster

When buying a water blaster, keep the following tips in mind for making a better decision:

Ease of use

Before buying a brand new model, get in touch and seek the help of experts who have exerience in pressure washing services. These professionals will help you get a sense of how it works.

If you’re new at it, handling a bigger or a heavier waster blaster on your own might be a bit too much for you. Keep in mind that you also need to assess the design. For example:

  • Is it easy to manage its settings?
  • Do you have to stop what you’re doing and fiddle with it for some time? For example – you need to pause to adjust the pressure through a digital display on the pistol grip (in certain water blasters).
  • The condition of the cart’s wheels and the handle is also an important consideration. You don’t want the cart to tip over or struggle to move smoothly while you’re pushing it around often.


During summers, some parts of NZ face a little bit of water shortage – so it’s important to be careful as to how to use the water effectively and efficiently. It doesn’t matter which model you buy though, because all water blasters are meant to save water (compared to using a bucket of water to clean certain areas).

Speaking of water, the water flow rate and the psi are also important factors to keep in mind. In this case, it may take longer to clean because your water blaster has a lower flow rate and lesser psi. If you run your water blaster for a long time, it may not save any water.

Understanding the nozzles and spray options

Your water blaster might have a number of different nozzle heads and spray options. You need to make sure that your model has enough features to do all the different things you want to do with it. Check if it’s possible to add detergent to the water flow, or there are special attachments that can be used for certain jobs, like clearing blocked drains or cleaning cars and bicycles.

What to look out for

Consider the following factors to assess a water blaster based on your needs:


While water pressure (measured in psi) is a figure that water blaster manufacturers typically uset, the water flow rate (litres per minute, or l/pm) is what really defines how effective a machine is at cleaning. If you have a lot of pressure but not a lot of water, you won’t be able to clean a whole lot. A high flow rate with low water pressure, on the other hand, will transform your water blaster into a fancy hose.

Simply said, psi isn’t the only figure you should consider. Even if two models have the same psi, if one has a much lower water flow rate, it will not perform as well. Generally speaking, the higher the flow rate of your water, the more efficient the cleaning procedure. And if you can complete a task in less time, you may be able to lower your total water use.

Added costs

If you choose a petrol version, you’ll have to consider various factors, such as –

  • Gas and oil, and
  • Its maintenance.

You’ll need a decent extension cord if you opt for an electric one. You won’t be able to walk away with a cheap one for a few bucks. Instead, you’ll need a heavy-duty one meant for outdoor usage.

Assess the battery-life

A domestic water blaster cannot operate non-stop. You could make use of its functions for a couple of hours at a stretch. But after that, it’ll start to overheat, and you’ll need to put it away for a while.

Most low-cost water blasters utilise an air-cooled pump, but you may need a water-cooled pump if you want it to survive longer. So see if this is a possibility.

Whether you’re hiring or shopping for a new model, you must enquire about its cooling system. This will, in turn, help you assess the model better with respect to your needs. The more effective the pump is in cooling itself, the longer your water blaster will be able to work better, regardless of whatever model you purchase.

It’s all about safety: Things to know before you begin

While spraying water about may sound like an easy job, a few things can work against you, while using a water blaster. So, here are a few tips to keep you safe (so that you don’t have to go through the trouble).

A high-stress scenario

Water-blasters have the potential to cause a lot of damage when left unattended (with the power ON). Never direct it towards someone since a blast from one of these may be quite dangerous.

Before you go all in, test it out

If the pressure on your water blaster is too high, you risk destroying whatever you’re blasting. This is especially true if you’re using a focused nozzle that only covers a tiny region. So, don’t go too near at first, and try it on a small area first.

Furthermore, you should constantly be cautious of the surface you’re working on. Don’t use too much pressure while cleaning your windows, and don’t go all-in on your weatherboards from close range with the same pressure as your concrete.

For example, timber decks might prove to be particularly sensitive to water blasters as these might cause permanent damage to the wood. If you have to, then do it by setting it at a low pressure and using a broad nozzle. Never go closer to the deck more than 300mm. Alternatively, you may purchase a nozzle head made particularly for cleaning decks.

If you face any doubts, it’s always a good idea to consult pressure washing services experts in your town.

Always use an RCD

Water and electricity aren’t exactly best friends. So, always use a residual circuit device (RCD) while using an electric water blaster to protect yourself against any electrical hazard.

Follow the instructions in the right order

It’s never a good idea to let a water blaster run dry. This implies that you must always turn on the hose before turning on the electricity. Furthermore, you should never leave it running unattended. If you’re not spraying, the machine’s water pressure may rapidly build-up, and may damage your property (and waste water). So remember to switch it off if you’re not spraying.

Contrary to popular belief, it’s not a good idea to leave your waster blaster moist. Furthermore, don’t try to clean your water blaster with another water blaster. Always read the handbook before using any such machine for the first time, and if you’re uncertain, consult an expert before buying something.

Get professional help

If you have more questions about how to use a water blaster or you want to seek the help of an expert, feel free to get in touch with us today.