Pressure washers usually become confusing at the connections: the garden hose feeding the pump, the high-pressure hose leaving it, the nozzle changing the spray, and the detergent system that only works under the right conditions.
For concrete examples, this class uses Westinghouse documentation for the ePX3500 electric pressure washer. Westinghouse lists five quick-connect tips on that model: 0°, 15°, 25°, turbo and soap. Its manual also calls out inlet screens, hose O-rings, nozzle cleaning and pump protection, which gives us a good map of the ownership questions people run into.
Lesson 1: Water supply comes before pressure
The pump cannot make steady pressure if the inlet supply is restricted. Westinghouse tells owners to fully unwind the garden hose and remove restrictions before operation. If your washer pulses, start on the supply side before deciding the pump has failed.
See how the garden hose can affect pressure-washer behavior.
Lesson 2: The nozzle changes the job
The narrowest stream concentrates force in a smaller area. That can clean stubborn material, but it can also damage a surface faster. Start with the least aggressive practical option and test an inconspicuous area.
Use the nozzle guide before aiming a narrow tip at something you care about.
Lesson 3: Soap is a low-pressure job on many electric washers
On the ePX3500, detergent is used through the soap nozzle. Thick, gel-like detergent is specifically discouraged because it can clog the system.
If detergent will not draw, start with the soap guide.
Lesson 4: Tiny maintenance items can save a lot of aggravation
The ePX3500 manual tells owners to keep a nozzle-cleaning tool nearby and to clean and lubricate the high-pressure-hose O-rings. Those are tiny parts, but either can create a very obvious problem.
Lesson 5: Storage is part of the machine’s life
Westinghouse warns against freezing conditions and suggests a commercial pump protector for storage. That matters if the machine lives in an unheated garage or shed.
Use the winter-storage guide before the first freeze.
Work through the class by problem
- Why does my pressure washer pulse or surge?
- Why won’t it spray soap?
- Which nozzle should I use?
- Does the garden hose matter?
- Is a surface cleaner worth it?
- Why is the hose connection leaking?
- How should I store it for winter?
Sources used for this answer
- Westinghouse ePX3500 owner manual
- Westinghouse ePX3500 replacement parts list
- Westinghouse ePX3500 product page
More project guides: Outdoor Cleaning.