Sun Joe SPX3000 vs Sun Joe SPX4000 – Which one is better?

Last updated on March 8th, 2023 at 12:16 pm

Pressure washers are made to make your life so much easier, but selecting the right option is almost never easy. There are so many options available in the market, each one of them offering different features, so what to choose? If you have been on a pressure washer hunt for a while, you must be aware of the amazing product line by sun joe. They are known for producing the best quality pressure washers which are admired all over the world.

Having a tough time choosing between sun joe spx3000 vs spx4000? These are amazing when it comes to performance, but there are some features that make a huge difference. So, without further ado, let’s dig further into the details.

Performance and power

When you are buying a pressure washer, the first thing to look for is the performance and motor pressure. Gladly, both these units offer amazing pressure. They feature 14.5amp motors and 1,800 volts. Both models also provide up to 2,030 PSI and 1.76 GPM.  Normally, pressure washers designed for domestic use have comparatively low pressure. The high PSI and relatively low GPM help in increasing the water pressure efficiently, without consuming extra water. This pressure will be able to clean every type of outdoor mess. 

Detergent tanks

Detergent tanks are more important than you think. Especially, if you are looking forward to cleaning large yards and areas, a large detergent tank will be required. No one likes to refill their detergent tanks after every hour. Plus, if you are thinking about skipping the use of detergent, it is not recommended. For efficient cleaning, it is important to use detergent first. Otherwise, you will not be able to get tough stains. 

  • SPX3000

This amazing unit comes with two separate detergent tanks. You can use these detergent tanks for different types of soaps. If you are going to do some high-end cleaning, it is recommended to use soap with higher viscosity. But for simple tasks like cleaning your car, you can use detergent with lesser viscosity. Make sure that you make a watery solution for cleaning your car, otherwise, you might end up ripping off paint from your car. High-viscosity soap is ideal for cleaning oil spills and tough stains. If you are going to clean large areas, you can fill both tanks with the same soap and it will last throughout the day. 

  • SPX4000

This unit comes with a much bigger tank, but there is no separation between them. This means you will not be able to separate the soap-based solutions on the base of viscosity. If you want to change the soap, you will have to clean out the whole tank and then refill it again. This could be really exhausting when you are already tired from all the cleaning. On the positive side, this tank holds a capacity of 54.1 fl oz, which means if you are looking forward to cleaning large areas, you will have to just fill it out once, and then you are good to go for the rest of the day. 

Pressure Select Technology

Pressure select technology is also an important feature when you are aiming for perfect cleaning. There are very few pressure washers available for domestic use, which offer this technology.

  • SPX3000 

Even though this is a decent pressure washer, it lacks this technology. It does not have a variable speed dial or switch. It can only offer you high speed (up to 2,030 PSI). This means if you once start cleaning, you will be stuck with the same pressure. This could be a problem, as not every situation requires high-pressure cleaning. For getting the perfect results, it is important that you keep changing, the pressure according to the environment. Plus, it increases water wastage. The only way to control water is by putting the trigger, which is not easy. You can also use the quick-connect nozzles, for keeping the pressure according to your requirement.

  • SPX4000

This unit comes with pressure select technology. This means that you can change the pressure and speed, whenever you want. The best part is that you just have got to change the speed dial or switch. The low gear provides 1,450 PSI, it perfect for cleaning your car or just getting off the dirt. The high 2,030 PSI is recommended when you are dealing with tough stains, like oil spills. Be very cautious, while using high pressure, it can cause permanent damage if the target is fragile. 

5 Quick-Connect Nozzle Spray

Like any other domestic pressure washer, this unit comes with 5 Quick-Connect Nozzle Spray. The 0°-nozzle is extremely powerful. It is only used when you are dealing with tough stains. 15°-nozzle is powerful too, but it is slightly less than 0°-nozzle. The water pressure is not focused on one point, the spill is much wider. The 25° and 40° are considered low-pressure nozzles. They are ideal for cleaning out dirt from sidewalks and driveways. The last one is the detergent nozzle; it is used for spraying any kind of detergent and soap on the target.

Safety Lock Switch

Both units come with a safety lock switch. This switch is in the trigger. When the machine is not being used, it is automatically turned off. This helps in saving water. Plus, it helps shut water pressure off immediately in case your pet or child comes in front of the stream. It also increases the lifetime of pressure washers. 


Both units are amazing when it comes to cleaning around the house. They offer almost the same features and performance. The only major difference is the detergent tanks. If you are looking forward to doing simple jobs, a single detergent tank will do for you. But it is better to still have the option of two detergent tanks. You never know, what you might end up cleaning once you get the unit. Another major difference is the weight. Both units are portable and easy to carry around. 

As far as the hose reels are concerned, these are also very important. You will be needing them. Especially, when you have got to store the pressure washer. This feature is only available in SPX3000.


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