Pressure Washer Nozzle Guide: Colors, Spray Angles & Nozzle Sizes Explained

The familiar quick-connect nozzle set generally includes 0°, 15°, 25°, 40° and a low-pressure soap nozzle. Manufacturers commonly identify these as red, yellow, green, white and black respectively.

Red Nozzle: 0°

The red 0° nozzle produces an extremely concentrated stream.

It puts the machine's cleaning force into a very small area, making it useful for certain stubborn deposits and spot cleaning on hard, durable surfaces.

It is also extremely easy to misuse.

A 0° stream can damage wood, painted surfaces and other materials very quickly. Even concrete can be visibly marked by aggressive pressure washing.

This isn't the nozzle to grab simply because something is dirty.

Use it when the application actually calls for a concentrated stream, not because red looks like the angry one.

Yellow Nozzle: 15°

The yellow 15° nozzle produces a narrow fan with considerably more coverage than a 0° tip while remaining aggressive.

It's commonly used for heavier cleaning on durable surfaces such as concrete, brick and unpainted masonry.

Distance and technique still matter. A 15° nozzle used too close to the wrong surface can absolutely cause damage.

Green Nozzle: 25°

The green 25° nozzle is one of the most useful general-purpose pressure-washing tips.

Its medium-width fan provides a good balance between cleaning action and coverage, making it useful for many common exterior-cleaning jobs.

That doesn't make it automatically safe for every surface. Pressure, distance, material and condition still matter.

When you're unfamiliar with a surface, start farther away and test before getting aggressive.

White Nozzle: 40°

The white 40° nozzle produces a much wider spray pattern and spreads the water over a larger area.

It's commonly used for lighter cleaning, rinsing and more delicate surfaces. Manufacturer guidance includes applications such as vehicles, boats, wood, vinyl and painted surfaces.

That doesn't mean you can bury a 40° tip against automotive paint and pull the trigger without thinking.

A wider nozzle reduces concentration. It doesn't make bad technique harmless.

Black Nozzle: Soap

The black nozzle is designed for low-pressure chemical application on pressure washers equipped with a compatible chemical injection system.

Many downstream injectors rely on the pressure drop created by the low-pressure soap nozzle to draw chemical into the water stream.

That's why you may switch to your soap tip and suddenly the injector starts drawing chemical when it wouldn't with your high-pressure tips.

But the black nozzle isn't some universal chemical button. Chemical delivery depends on how the particular pressure washer and injection system are designed.

We'll get deeper into that in our guide to downstream injectors and chemical application.

Spray Angle and Nozzle Size Are Not the Same Thing

Here's where pressure washer nozzles get more interesting.

A 25° nozzle tells you the spray angle.

It does not tell you the complete nozzle specification.

Pressure washer tips also have an orifice size, and that size needs to be appropriate for the machine's GPM and desired operating pressure.

For example, manufacturers sell visually similar five-nozzle sets with different orifice sizes. We currently offer one set with a 3.0 orifice rated up to 3,600 PSI and another with a 4.0 orifice rated up to 4,500 PSI.

Same familiar colors.

Different nozzle sizing.

That matters.

Why Pressure Washer Nozzle Size Matters

The nozzle creates a restriction at the end of the pressure washer system.

Its orifice size, combined with the amount of water the pump is moving, affects the pressure developed in the system.

Too large an orifice for the machine's flow and the pressure at the nozzle will be lower than intended.

Too small an orifice can create excessive restriction and may cause the system to operate above the pressure you intended, depending on the machine and unloader setup.

That's why professional nozzle selection isn't simply:

“I need a green one.”

It's closer to:

“I need the correct orifice for this machine, and I want a 25° spray pattern.”

How Do I Choose the Correct Nozzle Size?

Once you know the spray angle you want, you still need the correct orifice size for your machine.

Nozzle sizing is based on the relationship between water flow (GPM) and operating pressure (PSI). Instead of guessing, use the General Pump nozzle sizing guide below to match your machine's flow and pressure to the appropriate nozzle size.

General Pump publishes nozzle charts specifically for matching GPM, nozzle size and pressure.

For example, find your machine's GPM and desired PSI on the chart. Their intersection gives you the appropriate nozzle size.

Remember: the nozzle size and spray angle are two different things. A 4.0 nozzle can be 0°, 15°, 25°, 40°, etc. The 4.0 controls the orifice sizing, while the angle controls the spray pattern. If you don't know the correct nozzle size for your machine, check the manufacturer's specifications or nozzle chart rather than guessing.

What About Turbo Nozzles?

A turbo nozzle, sometimes called a rotary nozzle, takes a concentrated stream and rapidly rotates it in a circular pattern.

That gives you aggressive cleaning action while covering more area than you'd get from holding a stationary 0° stream in one place.

They're extremely useful for certain concrete, masonry and heavy-cleaning applications.

They're also aggressive.

A turbo nozzle isn't a shortcut for every dirty surface. Keep it away from materials that can't tolerate concentrated pressure, and always follow the nozzle manufacturer's pressure, flow and surface recommendations.

Distance Changes Everything

The nozzle isn't the only thing controlling cleaning intensity.

Distance from the surface matters tremendously.

Move closer and the spray becomes more concentrated at the surface.

Move farther away and the spray spreads out and loses impact.

That's why a good habit is to start farther from an unfamiliar surface and move closer only as necessary.

You can always increase cleaning intensity.

Repairing something you just carved your initials into is considerably more annoying.

Let Chemistry Do Its Share of the Work

One of the easiest mistakes to make with a pressure washer is trying to solve every cleaning problem with more pressure.

Oil, grease, road film, organic growth and mineral contamination are different kinds of soils. Pressure alone isn't always the most efficient or safest way to remove them.

The right cleaning chemical can help loosen or break down contamination before rinsing.

That means you can often get better results from:

the right chemistry + proper dwell time + the appropriate nozzle + adequate water flow

instead of simply reaching for a narrower spray tip.

As we covered in our PSI vs. GPM guide, pressure is only one part of the cleaning system.

Quick Pressure Washer Nozzle Guide

These are common conventions used by pressure-washer manufacturers, but always verify the specifications of the actual nozzle and equipment you're using.

The Bottom Line

Pressure washer nozzle colors make spray patterns easy to identify, but color isn't the whole story.

Spray angle determines how the water is distributed. Nozzle orifice size helps determine how the machine's flow translates into operating pressure.

Choose the spray pattern for the surface and cleaning job, then make sure the nozzle size actually matches your pressure washer.

And if your solution to every cleaning problem is the red tip...

Eventually something is going to lose that argument.