Pressure Washing Rig Set Up — A Basic Overview of What You Need
Apr 19, 2026Pressure Washing Rig Set Up — A Basic Overview of What You Need
By Jason Geiman, King of Pressure Wash | 141,000+ views on YouTube
Setting up a pressure washing rig is one of the first big decisions you’ll make when starting a pressure washing business, and getting it right from the beginning saves you a lot of time, money, and headaches down the road. Whether you’re building your first rig on a small trailer or outfitting a full-size truck setup, the basic components and layout principles are the same.
I’ve been building and running pressure washing rigs for over 15 years. I’ve built rigs on open trailers, enclosed trailers, flatbed trucks, and box trucks. In this post, I’ll give you a basic overview of every component you need on a pressure washing rig and how they all connect together.
About Jason Geiman
Founder, King of Pressure Wash | 51,800+ YouTube Subscribers | 2,000+ Videos
Jason Geiman has been in the pressure washing industry for over 15 years, running his own pressure washing company and training thousands of contractors through his online courses, in-person training events, and weekly live streams. He is the founder of KingOfPressureWash.com and has built one of the largest pressure washing education communities in the world.
The Pressure Washer — The Heart of Your Rig
Everything starts with the pressure washer itself. For commercial work, you want a belt-driven machine — not a direct-drive consumer unit. Belt-driven machines run cooler, last longer, and are designed for the daily punishment of commercial pressure washing.
GPM matters more than PSI. Most commercial machines run at 3,500-4,000 PSI, which is more than enough for any residential or commercial job. What separates a productive rig from a slow one is GPM — gallons per minute. A 4 GPM machine cleans noticeably faster than a 3 GPM machine, and an 8 GPM machine is a whole different world. Choose your GPM based on the type of work you plan to do and your budget.
Engine choice matters. Honda GX series engines are the industry standard for reliability. They start easy, run smooth, and parts are available everywhere. Some operators run Kohler or Vanguard engines and have great results too. The key is buying a machine with a proven, serviceable engine.
The Buffer Tank
A buffer tank sits between the water source (the customer’s spigot) and your pump. It stores water so your pump never runs dry, even if the spigot can’t keep up with the pump’s flow rate. Running without a buffer tank risks cavitation — air getting pulled into the pump — which destroys internal components fast.
A 35-65 gallon tank is standard for most rigs. Mount it higher than the pump inlet so water gravity-feeds into the pump. Install a float valve to automatically regulate the water level as it fills from the garden hose and drains to the pump.
The Hose Reel
A hose reel keeps your high-pressure hose organized, protected, and easy to deploy and retrieve. Without a reel, your hose gets tangled, kinked, and dragged across the ground where it wears out faster.
Match the reel to your hose. Make sure your reel is rated for the PSI and can hold the length and diameter of hose you run. A 3/8” hose takes up less space on the reel than a 1/2” hose, but the larger hose has less friction loss — which matters on longer runs.
Mounting position matters. Mount the reel where you can easily spool and unspool the hose without it rubbing against other equipment. A lot of operators mount the reel at the back of the trailer for easy access at job sites.
Chemical Delivery System
You need a way to apply cleaning chemicals to surfaces. There are several options, and most professional rigs use one or more of these:
Downstream injector — This is the simplest and most common system. The injector sits on the outlet side of the pump and uses the Venturi effect to pull chemical from a container into the water stream. It only works at low pressure (when you’re using a low-pressure nozzle), which is exactly what you want for applying chemical.
12-volt pump system — A battery-powered pump that draws chemical from a tank and sprays it through a separate hose and nozzle. This gives you more control over the chemical strength and application rate. It’s especially useful for roof cleaning and soft washing where you need a stronger chemical mix than a downstream injector can deliver.
X-Jet — An attachment that connects to your pressure washer wand and draws chemical from a bucket through a siphon tube. It’s a simple, affordable way to apply chemical at a distance. Good for house washing and reaching second-story surfaces.
Hoses, Fittings, and Accessories
High-pressure hose — You need enough hose to reach from your rig to the farthest point on any property you’ll be cleaning. Most operators carry 150-200 feet of high-pressure hose. Consider running 3/8” hose for lighter residential work or 1/2” hose for less friction loss on longer runs and higher-GPM machines.
Garden hose for water supply — Carry at least 100 feet of garden hose to connect the customer’s spigot to your buffer tank. A good quality, kink-resistant garden hose makes a big difference when you’re setting up on every job.
Quick disconnect fittings — QC fittings let you quickly swap between your wand, surface cleaner, and other accessories without threading and unthreading connections. Use quality brass or stainless steel fittings — cheap ones leak and wear out fast.
Trigger gun and wand — Invest in a professional-grade trigger gun rated for your machine’s PSI and GPM. Add a live swivel between the hose and gun to prevent the hose from twisting. Carry multiple nozzle tips for different spray patterns.
Surface cleaner — For flatwork (driveways, sidewalks, patios), a surface cleaner is essential. It cleans faster and more evenly than a wand alone. Match the surface cleaner size to your machine’s GPM output.
Layout and Organization
How you arrange everything on your trailer or truck matters more than you might think. A well-organized rig lets you set up and break down faster, keeps your equipment protected, and looks professional to customers.
Keep the pressure washer accessible for maintenance and oil checks. Don’t bury it behind other equipment. Mount it securely — it vibrates when running, and loose mounting will damage the frame and the machine over time.
Route your plumbing cleanly. The path from the buffer tank to the pump, from the pump to the hose reel, and the chemical lines should all be neat and organized. Use clamps and brackets to secure hoses and prevent them from rubbing against sharp edges.
Think about your workflow. When you pull up to a job, what do you grab first? Where does each hose go? Arrange your rig so your setup sequence flows naturally without climbing over equipment or untangling lines.
Want Detailed Rig Building Guides and Training?
Jason Geiman covers rig building, equipment selection, plumbing, and business strategy in his training courses and weekly live streams.
Visit KingOfPressureWash.com to Learn MoreFrequently Asked Questions
What do I need to set up a pressure washing rig?
A basic professional rig needs a belt-driven pressure washer, buffer tank with float valve, hose reel, high-pressure hose, garden hose for water supply, trigger gun with wand, quick disconnect fittings, nozzle set, surface cleaner, and a chemical delivery system (downstream injector or 12-volt pump).
Should I build my pressure washing rig on a trailer or a truck?
Both work well. A trailer is more affordable to start with and can be pulled behind a vehicle you already own. A truck-mounted rig is more compact, easier to maneuver, and looks more professional. Most operators start with a trailer and upgrade to a truck setup as their business grows.
How much does it cost to build a pressure washing rig?
A basic professional rig can be built for $3,000-$5,000 if you shop smart. A fully outfitted rig with a high-GPM machine, hose reel, buffer tank, and all accessories can run $8,000-$15,000 or more. Start with what you can afford and upgrade as revenue comes in.
What GPM pressure washer should I start with?
A 4 GPM machine is a great starting point for most residential and light commercial work. It provides enough flow to be productive with a surface cleaner while being affordable and manageable. As your business grows, you can upgrade to a higher-GPM machine for faster production.
Do I need a hot water pressure washer?
Not for most residential work. Cold water with the right chemicals handles house washing, driveway cleaning, and most common jobs. Hot water is valuable for commercial grease removal, kitchen exhaust cleaning, and heavy industrial work. It’s a significant investment — add it when your business needs justify the cost.
