Pressure Washer Guns

Professional-grade equipment and supplies at Sun Brite Supply — Gaithersburg, MD

A quality pressure washer gun reduces hand fatigue during long days of spraying. We stock guns rated for various PSI and temperature ranges - match the gun to your machine specs for safety and performance.

Cheap guns wear out fast and leak. Invest in a professional-grade gun and keep a repair kit on your truck.

What to Know Before You Buy

Call (301) 519-9274 for pressure washer gun recommendations based on your machine.

Ergonomic Design

Reduce hand fatigue during long days of commercial spraying.

PSI & Temp Rated

Matched to your machine for safety and performance.

Chemical Compatible

Downstream and upstream injection options for every setup.

Repair Kits Stocked

Rebuild your gun or injector instead of replacing it.

Gun & Injector Guide

Component	Function	Key Spec	Replace When
pressure washer gun	Spray on/off control	PSI & temp rating	Stiff trigger or leak
Straight Lance	Direct spray aim	18" - 36" length	Bent or corroded
Dual Lance	Soap/rinse switch	Two nozzle ports	Valve failure
Downstream Injector	Chemical siphon	GPM-matched ratio	Not drawing chemical
Foam Cannon	Thick clinging foam	Adjustable mix	Poor foam quality

Frequently Asked Questions

Why is my downstream injector not drawing chemical?

The most common cause is a wrong-sized soap nozzle tip. The tip must create enough pressure drop for the venturi effect to siphon chemical. Also check for air leaks in the chemical pickup line and a clogged filter.

What is the difference between downstream and upstream injection?

Downstream injects chemical after the pump at low concentration (10-15:1 ratio). Upstream systems like the X-Jet draw from an external container at higher concentrations. Upstream is stronger but does not protect the pump from chemical.

How do I choose the right pressure washer gun?

Match the gun PSI and temperature rating to your machine specs. A gun rated below your system pressure is a safety hazard. Also consider ergonomic grip and trigger effort for long-day comfort.

What lance length should I use?

Standard 36" lances work for most ground-level cleaning. Shorter 18" lances give more control for detail work. Extension lances reach second-story surfaces without ladders.

How often should I rebuild my pressure washer gun?

Rebuild when the trigger gets stiff, the gun leaks at the stem, or you cannot get a clean shut-off. Most commercial contractors rebuild guns annually. Keep a repair kit on your truck.

Need Help Choosing? Call Us.

30 years of industry experience. (301) 519-9274

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