A pressure washer not building pressure can be a frustrating issue, but it is often caused by simple and easily fixable problems. This comprehensive guide will walk you through the common causes and solutions to help you get your pressure washer back to peak performance.
Insufficient Water Supply
One of the most common reasons for a pressure washer losing water pressure is an inadequate water supply. To ensure your pressure washer is receiving the necessary water flow, consider the following:
- Minimum Water Pressure: Your pressure washer requires a minimum of 20 PSI (25 PSI for POWERflow+ models) of water pressure to function properly.
- Minimum Water Flow Rate: The minimum water flow rate required is 4 GPM (7 GPM for POWERflow+ models).
- Garden Hose Condition: Check your garden hose for any kinks, leaks, or blockages that could be restricting water flow. Ensure the hose is long enough to maintain the required water pressure.
- Water Source: Verify that your water source, such as a faucet or outdoor spigot, is providing the necessary water pressure and flow rate.
Blockages and Leaks
Blockages and leaks within the pressure washer system can also lead to a loss of water pressure. Here’s what you should check:
- Water Inlet and Filter Screen: Inspect the water inlet and filter screen for any debris or damage. Clean or replace them if necessary.
- High-Pressure Hose: Examine the high-pressure hose for any signs of leaks or damage. Replace the O-rings if needed.
- Spray Gun: Ensure the spray gun is not leaking, and replace it if necessary.
Nozzle Issues
The nozzle on your pressure washer plays a crucial role in maintaining the desired water pressure. Consider the following:
- Nozzle Blockages: Check the nozzle for any blockages or wear and tear. Clean or replace the nozzle as needed.
- Nozzle Setting: Ensure the nozzle is set to the high-pressure setting, as the low-pressure setting will result in a significant loss of water pressure.
Pump Issues
Problems with the pressure washer’s pump can also contribute to a loss of water pressure. Here’s what you should check:
- Pump Oil Level: Verify the pump oil level and add more oil if necessary.
- Pump Condition: If the pump is faulty, it may need to be repaired or replaced.
Other Causes
In addition to the above issues, there are a few other factors that can affect your pressure washer’s water pressure:
- Engine Speed: Ensure the engine is running at full speed, as a lower engine speed can result in reduced water pressure.
- Air in the System: Check for any air in the system and purge it if necessary.
Troubleshooting Steps
To diagnose the root cause of your pressure washer’s water pressure loss, follow these troubleshooting steps:
- Disconnect and Clean: Disconnect the garden hose from the water inlet and clean the inlet and filter screen.
- Check Water Flow: Attach the garden hose to the machine without the pressure hose and check for water flow.
- Check the Pump: Attach the garden hose to the pump and turn on the engine. If water flows with increased pressure, the issue is likely in the attachments.
Technical Specifications
- Minimum Water Pressure: 20 PSI (25 PSI for POWERflow+ models)
- Minimum Water Flow Rate: 4 GPM (7 GPM for POWERflow+ models)
- Typical Pressure Washer Pressure: 1,300-3,200 PSI
References
- Briggs & Stratton. (n.d.). Why is my pressure washer producing low or no pressure? Retrieved from https://www.briggsandstratton.com/na/en_us/support/faqs/browse/pressure-washer-produces-low-pressure.html
- Reddit. (2022, May 27). Why doesn’t my pressure washer have any water coming out? Retrieved from https://www.reddit.com/r/pressurewashing/comments/uynqam/why_doesnt_my_pressure_washer_have_any_water/
- Husqvarna. (n.d.). Why Has my Pressure Washer Lost Pressure? | Pressure Washer Repair Guide. Retrieved from https://www.husqvarna.com/nz/learn-and-discover/why-has-my-pressure-washer-lost-pressure-pressure-washer-repair-guide/
- Repair Clinic. (2022, July 15). No Water Pressure In Your Pressure Washer? 2 Likely Causes. Retrieved from https://diy.repairclinic.com/no-water-pressure-in-your-pressure-washer-2-likely-causes/
- YouTube. (2019, June 11). Fix a PRESSURE WASHER with NO PRESSURE in 60 SECONDS. Retrieved from https://www.youtube.com/watch?v=pREA26rFcLc