Westinghouse ePX3500 vs ePX3100: Which One? (October 2026)

On this page (8 sections)

1. Westinghouse ePX3500 vs ePX3100: which should you choose?
2. What features do both Westinghouse washers share?
3. Is the ePX3500 better for driveways and patios?
4. Does the ePX3100 clean faster because of its flow rate?
5. Which model is easier to set up, store and move?
6. What common mistakes should you avoid?
7. What should you check before buying either one?
8. Westinghouse ePX3500 or ePX3100: which one is right for you?

Choose the Westinghouse ePX3500 for higher rated pressure, or the ePX3100 for slightly higher rated flow. This Westinghouse ePX3500 vs ePX3100 comparison is close: both are compact electric washers with a 25 ft hose, four-wheel steering, a soap tank and five nozzles.

The ePX3500 is rated at 2000 PSI and 1.2 GPM. The ePX3100 is rated at 1900 PSI and 1.24 GPM, so the pressure and flow advantages point in opposite directions.

Both have 1.76 max GPM at the lowest pressure. Use the rated figures as the more useful starting point, then consider the surfaces you clean, your water and power access, and how you plan to store the washer.

Westinghouse ePX3500 vs ePX3100: which should you choose?

Pick the ePX3500 if higher rated pressure is your priority; pick the ePX3100 if you prefer its slightly higher rated flow. The two machines share most of their practical features, so the choice rests on a small output difference and the jobs you expect them to handle.

The ePX3500 has 2500 max PSI and 2000 rated PSI. The ePX3100 has 2300 max PSI and 1900 rated PSI, while their rated flows are 1.2 and 1.24 GPM, respectively.

Maximum figures are not the same as rated working figures. For a home buyer, the rated pressure and flow give a better basis for comparing these two models.

Neither is an automatic choice for every job. If you mainly wash a vehicle, patio furniture or fencing, the shared nozzle set and soap tank may matter more than the modest difference in rated output.

Who should buy the ePX3500 or ePX3100?

Choose the ePX3500 for the pressure edge, and the ePX3100 if the small flow edge better matches your priorities. Either can suit routine home cleaning when you have an AC outlet and water connection nearby.

The ePX3500 is a fit for buyers who want the higher rated pressure in this pair for household tasks such as cleaning driveways, garage floors, stairs, fences, patios and vehicles. Its pressure advantage is modest, so it should not be treated as a substitute for choosing the right nozzle and working distance.

The ePX3100 suits buyers who care more about rated flow and want the same compact format and included accessories. Its 1.24 GPM rated flow is just 0.04 GPM above the ePX3500's, so don't expect that gap alone to transform a cleaning job.

Skip either model if you need a gas washer, can't work near a suitable outlet and water supply, or routinely clean large areas where you want a different class of machine. Our electric vs gas pressure washer guide can help you decide whether electric power fits your work.

What do pressure and flow mean in this comparison?

Pressure describes the force of the water, while flow describes the amount of water moving through the washer over time. The pressure washer GPM vs PSI guide explains how the two figures affect cleaning.

For these models, compare the rated figures first: the ePX3500 has the pressure edge, and the ePX3100 has the slight flow edge. A maximum PSI number does not mean the washer sustains that pressure throughout a job.

The nozzle and distance also affect the result. A narrow spray can damage some surfaces, so follow the manual and begin on a small, inconspicuous area before cleaning a visible section.

What features do both Westinghouse washers share?

Both models have the same core setup: four-wheel steering, a 25 ft hose, a 20 oz soap tank and five quick-connect nozzles. These shared features make storage, maneuvering and accessory choice more alike than different.

Each stands 16.5 inches tall and weighs 19 pounds. The low center of gravity and four quick-lock wheels with 360° steering are designed to reduce tipping and make it easier to guide the unit around a work area.

The nozzle set includes 0°, 15°, 25°, turbo and soap applicator tips. Use the manual to match each nozzle to the surface, and avoid starting with a concentrated spray on paint, wood or other materials that can mark.

Both have an easy-coil nylon braided hose. The pump stops automatically when the trigger is released, and Westinghouse provides three-year limited service, labor and parts coverage for each model.

Is the ePX3500 better for driveways and patios?

The ePX3500 is the stronger fit if you want the higher rated pressure for hard outdoor surfaces. It is described for driveways, patios, garage floors and other household jobs, but the correct nozzle and technique still matter.

Its 2000 rated PSI is 100 PSI above the ePX3100's. That is a small advantage, not a reason to use an aggressive spray without checking what the concrete or patio finish can handle.

Begin with a wider nozzle and keep the wand moving at a steady pace. Test a small area first, especially on older, coated, stained or repaired surfaces.

The guide to pressure washing a driveway covers a careful approach to concrete.

The ePX3500 includes a turbo nozzle, which concentrates the spray. Use it only where the manual allows, since a concentrated stream can leave marks if held too close or too long.

Does the ePX3100 clean faster because of its flow rate?

The ePX3100's rated flow is slightly higher, but the 0.04 GPM difference alone does not mean it will finish a job faster. Surface type, soil, nozzle choice, water supply and your pace affect cleaning time.

Its rated flow is 1.24 GPM compared with 1.2 GPM for the ePX3500. Both have a maximum flow of 1.76 GPM at the lowest pressure, so don't confuse that shared maximum with their rated flow.

For broad, flat areas, technique and the size of the cleaning path matter. A surface cleaner guide can help you decide whether a surface-cleaner attachment would make driveway or patio work more manageable.

If you want to compare more electric models, see our best electric pressure washers. That roundup can help if neither machine's pressure and flow balance looks right for your jobs.

Which model is easier to set up, store and move?

The ePX3500 and ePX3100 are closely matched for storage and portability. Both are 16.5 inches tall, weigh 19 pounds and use a four-wheel base, so storage space and how you route the hose are more useful deciding factors than the small dimensional differences.

The ePX3500 measures 13.5 x 14 x 16.5 inches. The ePX3100 measures 14 x 13.5 x 16.5 inches, giving the two nearly the same footprint.

Before using either washer, place it on a stable, level surface and connect the water supply and hose as directed in the manual. Check that the water connection is secure, then clear air from the hose and washer according to the maker's instructions before squeezing the trigger.

Keep electrical connections dry and use an outlet and any extension cord only as the manual allows. Uncoil and route the hose so it doesn't snag on wheels, steps or furniture as you move around the work area.

When you're finished, release the trigger, shut the machine down and disconnect it in the order given in the manual. Coil the hose without sharp bends and store the washer in a protected place that meets the manual's storage guidance.

What common mistakes should you avoid?

Most problems come from choosing the wrong spray, rushing setup or expecting a compact electric washer to suit every job. A few simple checks help protect the surface and make the work easier.

Don't begin with the 0° or turbo nozzle on a surface you haven't cleaned before. Start with a wider spray at a greater distance, test an out-of-the-way spot and move closer only if the surface tolerates it.

Don't hold the spray in one place. Keep the wand moving, overlap passes evenly and adjust your distance before turning to a more concentrated nozzle.

Don't assume the soap tank replaces detergent instructions. Use only a cleaning solution that is suitable for the washer and the surface, and follow the manual for filling, applying and rinsing.

Don't pull the washer by its hose or leave the hose tangled around the wheels. Guide the unit by its frame and keep the hose path clear as you work.

Finally, don't buy based only on maximum PSI. For these two, rated pressure and flow show the real trade-off, while your water supply, outlet, surfaces and storage space determine whether either one fits.

What should you check before buying either one?

Choose based on your outlet, water access, surfaces and storage space. Both are AC electric washers, so plan to work within reach of a suitable power source and water connection.

Check your outlet and extension-cord needs against the manual before setup. Keep electrical connections dry and use the washer as directed.

Then consider the surfaces you clean most. A vehicle, patio furniture and fence call for care with nozzle selection and distance, while concrete can tolerate a different approach than painted or softer materials.

If you're unsure what output a job requires, our pressure washer size guide helps you think through pressure and flow for common tasks. If you expect frequent driveway cleaning, our guide to pressure washing a driveway can help you plan the work safely.

Westinghouse ePX3500 or ePX3100: which one is right for you?

Choose the ePX3500 for higher rated pressure; choose the ePX3100 if its slightly higher rated flow is your priority. For most buyers, that simple rule is more useful than focusing on maximum PSI or the tiny difference in flow.

The ePX3500 is the better fit when you want the pressure advantage for home cleaning and hard outdoor surfaces. The ePX3100 makes sense if you prefer its marginally higher rated flow and want the same compact footprint, hose, soap tank and nozzle options.

If you need a stronger fit for frequent large-area work, or want to compare another electric model before deciding, start with our electric pressure washer guide.

Frequently asked questions

What is the difference between the Westinghouse ePX3500 and ePX3100?

The ePX3500 is rated at 2000 PSI and 1.2 GPM, while the ePX3100 is rated at 1900 PSI and 1.24 GPM. Both have a 25 ft hose, a 20 oz soap tank and four-wheel steering.

Their maximum pressures are 2500 PSI and 2300 PSI, respectively.

Is the ePX3500 more powerful than the ePX3100?

The ePX3500 has the higher rated pressure at 2000 PSI versus 1900 PSI. The ePX3100 has a slightly higher rated flow at 1.24 GPM versus 1.2 GPM, so compare both rated figures when deciding which suits your jobs.

Do the ePX3500 and ePX3100 include the same nozzles?

Both include five quick-connect nozzles: 0°, 15°, 25°, turbo and soap applicator. Follow the manual's nozzle and distance guidance for each surface.

Which Westinghouse washer is easier to move?

Both are 16.5 inches tall and weigh 19 pounds. Each has four quick-lock wheels with 360° steering and a low center of gravity designed for anti-tipping.

Can either washer clean a driveway?

Both are described for driveway cleaning, and each includes a turbo nozzle. Start with a wider nozzle at a safe distance, test a small area and follow the manual's instructions for your surface.