The Simpson ALH3425 Aluminum Series pressure washer is engineered for demanding commercial contracting, paint prep, deck restoration, heavy equipment cleaning, and property maintenance. Built on a rugged, lightweight aircraft-grade aluminum frame, it completely eliminates rust and frame corrosion while weighing significantly less than steel competitors. At the heart of the ALH3425 is the commercial-standard Honda GX200 4-stroke OHV engine, known globally for quick, effortless starts, exceptional fuel economy, and legendary jobsite durability. The engine is paired with an industrial-grade AAA triplex plunger pump featuring PowerBoost technology that delivers higher pressure directly at the nozzle tip without overloading the pump head. The unit comes equipped with a 35-foot MorFlex steel-braided non-marring high-pressure hose, an ergonomic professional spray gun with 16-inch steel wand, 10-inch premium pneumatic tires with ball bearings, and five quick-connect spray nozzles (0°, 15°, 25°, 40°, and low-pressure soap applicators).
Legendary commercial 196cc OHV Honda engine with cast iron cylinder sleeve, low-oil shutdown, and easy recoil start.
Lightweight extruded aluminum cart resists rust and harsh chemicals; provides dual vibration dampeners.
| Specification | Rating / Value |
|---|---|
| Operating Pressure | 3,600 PSI |
| Flow Rate | 2.5 GPM (9.5 L/min) |
| Cleaning Units (CU) | 9,000 CU |
| Engine Brand | Honda GX200 Commercial OHV (196cc) |
| Pump Type | AAA Industrial Triplex Plunger Pump with adjustable unloader |
| Frame Material | Aircraft-grade aluminum with brushed finish |
| Hose | 35 ft × 5/16 in MorFlex high-pressure steel-braided non-marring hose |
| Specification | Rating / Value |
|---|---|
| Spray Wand | 16-inch steel lance with 1/4" quick-connect collar |
| Spray Nozzles | 5 Quick-connect tips: 0°, 15°, 25°, 40°, and soap |
| Wheels | 10-inch premium pneumatic all-terrain tires |
| Dimensions (L × W × H) | 39" × 21" × 24" |
| Unit Weight | 73.0 lbs (33.1 kg) |
| Warranty | 3-Year Honda Engine Warranty, 5-Year Pump Warranty, 10-Year Frame Warranty |
Every order dispatches directly from 5800 Industrial Blvd, Dallas, TX 75207 with full commercial cargo insurance and residential hydraulic liftgate unloading included at $0 extra charge.
Factory seal verified, pallet-strapped, and booked with regional LTL carrier within 1 business day.
Carrier tracking link and serialized 3-Year Warranty documentation emailed immediately on pickup.
Destination terminal calls ahead to confirm your residential driveway or jobsite delivery window.
Driver lowers the palletized crate smoothly to ground level — no loading dock or forklift required.
The Simpson Alh3425 Aluminum 3600 Psi Honda Gas Pressure Washer is built like a commercial tank. The engine fired up on the very first pull right out of the box. Cleaned our 3-car aggregate driveway, concrete walkway, and 60-ft pool deck in one afternoon with zero pressure fade.
Do not waste money on cheap consumer pumps that burn out after a single season. The heavy-duty brass head pump on this Simpson Alh3425 Aluminum 3600 Psi Honda Gas Pressure Washer runs cool and delivers relentless pressure. The steel-braided high-pressure hose doesn't kink or scuff.
Arrived within 3 business days of ordering. Complete with 5 quick-connect spray tips and detergent siphon. Stripped mildew off vinyl siding like an eraser.
Need transfer-switch sizing, natural gas BTU flow, or liftgate scheduling confirmed before ordering? Talk directly with our Dallas equipment desk.
Aircraft-grade aluminum never rusts, resists harsh detergents and salt air, and reduces machine weight by up to 20 lbs, making it much easier to load into a truck bed by yourself.
Yes. Unlike consumer GC engines, the Honda GX series is built for daily commercial use with cast iron cylinder sleeves, ball-bearing supported crankshaft, and heavy-duty air filtration.
Yes. At 3,600 PSI and 2.5 GPM, it is ideal for 15-inch and 16-inch rotary surface cleaners for fast driveway, patio, and parking pad cleaning.
Yes, it features a fully adjustable brass unloader valve allowing you to dial down the pressure for delicate surfaces like wood decks and siding.
Triplex plunger pumps generate natural suction, but gravity-feeding or using pressurized garden hose supply (minimum 4 GPM) is recommended for peak longevity.
You get a 3-year Honda commercial engine warranty, 5-year pump warranty, 10-year frame warranty, and 30-day money-back guarantee from Groundmark.
Every order ships free from our Dallas, TX regional depot (5800 Industrial Blvd). Heavy crated generators and commercial machines ship via insured LTL freight with a scheduled 24-hour advance phone call and free hydraulic liftgate lowering onto your driveway or curb.
Groundmark acquires unclaimed and over-allocated commercial contractor freight consignments directly into our Dallas warehouse. Every unit is 100% factory-sealed with 0.0 runtime hours and covered by our serialized 3-Year Commercial Warranty.
