Pressure Washer Repair Parts

Most broken pressure washers need a two dollar seal, not a new machine. This is our master pressure washer repair parts collection: O-rings, gaskets, bearings, burner parts, pump seals, and the odd bits nobody else stocks. If you know the part number, order it. If you only know the symptom, call 301-519-9274 and describe what the machine is doing. Diagnosing over the counter is what we do all day in Gaithersburg.

Diagnose by System, Not by Brand

Big parts sites make you hunt through 9,000 listings by brand and model. Faster method: figure out which of the four systems failed, then shop that system. A pressure washer is a water path, an engine, a burner if it heats, and the frame hardware that carries it all. Each one fails in its own predictable way.

Water Path: Leaks and Pressure Loss

Water on the ground under the pump means a seal or O-ring quit. Pressure that fades or pulses points to worn packings, a tired unloader, or a plugged inlet screen. Before you order a $500 pump, price the seals. Copper washers cost under a dollar, head gaskets run about $5, and a full O-ring service on most pumps stays under $30. Match the O-ring material to the water: Buna-N handles cold water fine, and Viton is the upgrade for hot water and strong chemicals. If your machine runs hot or pulls sodium hypochlorite, Viton seals last several times longer and cost only a little more.

Burner System: Hot Water Machines That Run Cold

When a hot water machine sprays cold, work the burner chain in order: fuel, air, spark, coil. A worn burner nozzle costs $3.50 and causes more no-heat calls than any other part, because the orifice wears open and the spray pattern stops atomizing. From there it climbs to electrodes, fuel pumps, and burner rings. Hard water scale inside the heating coil chokes flow too, which is why descaler pumps exist. If your coil has never been descaled and your water is hard, that is the place to start before buying burner parts.

Hardware: The Parts That Fail From Vibration

Frames, reels, and carts live a rough life. Wheel bearings wear oval, reel swivels start weeping, and zip ties give up in the sun. These parts are cheap and they are the difference between rolling the machine onto the trailer and dragging it. Keep spares. A $3.50 bearing installed in the shop beats a seized wheel on a job site an hour from home.

Common Repair Parts and Prices

These are counter prices at the time of writing. Availability shifts week to week, so call to confirm before a long drive.

From the Field

Twenty different O-rings in this collection, and they outsell everything else combined. That ratio is the honest story of pressure washer repair: rubber dies first, metal almost never. So here is the counter rule we give every new contractor. Build a field kit now, before the season starts. A spread of common O-rings and copper washers, a spare head gasket, a wheel bearing, and thread sealant fits in a coffee can and costs about $50. The crews that carry one lose twenty minutes to a blown seal. The crews that do not lose the day, plus the fuel to come see us, plus whatever the customer thinks of a rig dripping on their driveway.

Repair Parts by Machine and Brand

• Pump rebuild parts: General Pump, CAT, AR, Comet, Giant, and Udor
• Engine parts for Honda GX and small engines
• Burner parts for hot water machines
• Unloader valves and gasket kits
• Suttner gun repair kits and turbo nozzle repair kits
• Hose reel repair parts
• Surface cleaner parts and Whirl-A-Way parts

Rather point at the broken piece than describe it? Bring it to the Sun Brite Supply store in Gaithersburg and we will match it on the spot.

Frequently Asked Questions

How do I find the right repair part for my pressure washer?

Start with the model number on the machine frame and the pump model on the pump itself, since they often come from different makers. With those two numbers, or a photo of the failed part, we can match almost anything.

Why is my pressure washer leaking water underneath?

Usually a failed pump seal, head gasket, or fitting O-ring. Small steady drips are seal work. Milky pump oil at the same time means water crossed into the crankcase and the pump needs a full seal job soon.

What is the difference between Buna-N and Viton O-rings?

Buna-N is the standard rubber for cold water service. Viton costs more and survives heat and harsh chemicals far longer. Hot water machines and soft wash rigs pumping bleach should always get Viton.

Is it worth repairing an old pressure washer?

Run the numbers. Seals, gaskets, and even a pump rebuild usually total a fraction of a new machine, and frames and engines outlive everything else. We talk people out of new machines weekly. Repair loses only when the engine and pump are both gone.

Why does my hot water pressure washer not make heat?

Check the burner chain in order: fuel in the tank, burner nozzle, electrodes, fuel pump, then coil scale. The $3.50 nozzle is the most common fix. Heavy scale in the coil chokes flow and heat, and a descaler clears it without replacing the coil.

What spare parts should I keep on my rig?

Common O-rings, copper washers, a head gasket, quick connect seals, a wheel bearing, and thread sealant. About $50 covers it and prevents most lost days. Add a spare burner nozzle if you run hot water.

Can you match a part if I do not know what it is?

Yes. Bring the part to the counter or text a photo with a ruler in frame to 301-519-9274. Between measurements and our vendor books we identify nearly everything that comes in.