When your pressure washer starts losing power, pulsing, or spraying unevenly, there’s a good chance the nozzle is clogged. It’s one of the most common (and most frustrating) issues for both homeowners and pros, especially when you’re in the middle of a job. The good news? Most clogs are preventable with the right maintenance, filtration, and nozzle selection.
Below, we break down the most common causes of pressure washer nozzle clogs, how to fix them fast, and what you can do to keep your equipment running at peak performance.
What Causes Pressure Washer Nozzles to Clog?
Hard Water and Mineral Buildup
Hard water leaves behind calcium and magnesium deposits. Over time, these minerals stick to the inside of the nozzle and restrict flow. A worn-out nozzle or older attachment can make buildup even worse, which is why replacing your pressure washer nozzles regularly helps maintain consistent spray output.
Dirt, Debris, and Contaminants in the Water Supply
Unfiltered water, especially from outdoor or industrial sources, can carry tiny particles that block your nozzle and cause inconsistent spraying. Installing pressure washer strainers at the inlet dramatically reduces debris before it reaches the nozzle.
Worn or Damaged Nozzles
As nozzles wear down, their openings become irregular and more likely to trap debris. If you're seeing erratic spray patterns, it may be time to swap in a new set of pressure washer nozzles to restore proper flow and pressure.
Poor Maintenance or Infrequent Cleaning
Skipping regular nozzle cleaning allows debris and mineral buildup to accumulate over time. Tools like pressure washer connectors and quick-couplers also take on debris, so inspecting them regularly helps prevent clogs throughout the system.
How to Fix a Clogged Pressure Washer Nozzle
Use a Nozzle Cleaning Tool or Wire Kit
Start with a small cleaning wire to remove debris inside the orifice. Insert it gently to avoid damaging the nozzle.
Flush the Nozzle With Clean Water
Rinse from both ends to ensure all debris is pushed out.
Soak the Nozzle in Vinegar or Descaling Solution
This helps dissolve mineral buildup caused by hard water.
Check the Inline Filter or Strainer
Many pressure washers include a small debris filter at the water inlet. If your machine doesn’t have one, or if yours is worn, you can easily add protection with a pressure washer strainer to keep particles from entering the system.
Replace the Nozzle if It’s Worn or Damaged
If cleaning doesn’t restore a consistent spray pattern, replacing the tip may be the easiest fix. Keeping spare nozzles or assortments on hand ensures you never lose time on the job.
How to Prevent Clogged Pressure Washer Nozzles
Install a Water Filter or Inlet Screen
Using a durable strainer at your inlet is the simplest way to prevent debris from reaching your nozzle, especially if you’re using outdoor water sources.
Use Clean, Potable Water Whenever Possible
Avoid using water from ponds, tanks, or unfiltered wells unless you have proper filtration.
Flush the System After Every Use
A quick post-use rinse clears out residual dirt and minerals before they harden inside the nozzle or spray gun.
Choose the Right Nozzle for Your PSI and GPM
The wrong size causes stress throughout your system. Keeping a small selection of nozzles or assorted nozzle sets ensures proper performance and reduces clogs.
Inspect Your Connectors and Spray Guns
Debris often gets trapped in worn-out fittings, especially quick-connect points. Regularly checking your pressure washer connectors and spray guns helps prevent unexpected spray issues.
When to Replace a Pressure Washer Nozzle
Replace your nozzle if you notice:
- An uneven spray pattern
- Reduced pressure
- Pulsing or surging
- Visible wear around the opening
Most high-use users replace nozzles more often than homeowners due to daily wear and abrasive water sources.
Read How to Select a Replacement Nozzle
Pressure Washer Accessories That Help Prevent Clogs
Royal Brass and Hose offers a full lineup of accessories that help prevent buildup and keep your washer running reliably, including:
- Nozzles – Replacement tips in multiple spray patterns
- Strainers – Essential for trapping dirt before it reaches your nozzle
- Connectors – Upgraded fittings that ensure a clean, secure flow path
- Lances – Extended reach attachments that deliver consistent pressure
- Spray Guns – Ergonomic, reliable triggers that maintain flow
- Assortments – Multi-pack options that provide backups and variety
These parts not only help prevent clogs, but also improve pressure, consistency, and overall cleaning performance.
