The Ninja Classic NJA500 is a portable carpet extractor with an adjustable 500 PSI pump and a single 3-stage vacuum motor - the entry tier most professional carpet cleaning techs upgrade to once they outgrow the 100 PSI homeowner machines. Light enough to carry up apartment stairs, strong enough to deliver real cleaning results on residential and small commercial jobs.
Built for
- Carpet cleaning service start-ups: Adjustable pressure means you can dial it down for delicate fibers and back up for ground-in soil without buying two machines.
- Truck-mount backup: Most truck-mount operators keep a portable like the NJA500 for upstairs apartments and tight commercial jobs the rig cannot reach.
- Auto detail and upholstery: 500 PSI is plenty for car interiors, restaurant booths, and office chairs without saturating the cushioning.
- Property management crews: Multi-unit complexes use portables for between-tenant turnover where wand cleaning is faster than truck-mount setup.
Use cases
The Ninja Classic Single 3-Stage is the workhorse format for crews where one machine has to do many things across the route:
- Single-tech residential routes: Light enough for one tech to wheel into a multi-story home; 12-gallon capacity covers a 4-bedroom job without refilling.
- Light commercial maintenance: Pre-occupied office suites, dental offices, small retail. 3-stage vacuum recovers fast enough to leave carpet dry by next morning.
- Auto detail bays: Hot water injection and detail hand tools clean cloth seats, headliners, and floor mats.
- Restoration first-response: The lower-PSI portable lets restoration crews show up fast for Cat 1 water emergencies before a heavier truck-mount can be dispatched.
- Carpet maintenance subcontractors: Service operators who clean for property managers as a recurring contract value the Ninja for its reliability and parts availability.
What sets the Ninja Classic apart
Adjustable pressure is the feature that separates the NJA500 from fixed-pressure portables in the same price range. Most cheap portables run 50 PSI all the time - too weak for stains, too aggressive for delicate olefin. The Ninja's pressure dial lets the operator match the carpet, which means fewer ruined call-back jobs and better cleaning on the first pass. The 25-foot power cord is also longer than the 15-foot cord on most competing portables, which matters for hotel hallways and large open offices.
Specifications
- Pump: 500 PSI adjustable
- Vacuum: Single 3-stage motor
- Power cord: 25 feet
- Configuration: Portable, single-cord
- Use case: Residential and small commercial carpet, upholstery, and auto detail
Frequently asked questions
How does it compare to the Sandia Sniper or Mytee?
The Sandia Sniper 12-gallon is a larger 200 PSI machine for full-day commercial routes. The Mytee Lite series is a competitor in the same portable tier - typically 220 PSI fixed, vs the Ninja's 500 PSI adjustable. The NJA500 has more pressure headroom for tougher residential jobs.
Do I need a separate hot water tank?
The standard NJA500 uses water from the solution tank at room temperature. For hot-water cleaning, fill the solution tank with hot water from the tap or pre-heat. Heated portable models exist as separate SKUs.
What wand and hose work with it?
Standard 1.5-inch vacuum hose with 1/4-inch solution line. Compatible with most professional carpet wands, upholstery tools, and stair tools.
How long does a fill last on a residential job?
For a 1,500-square-foot residential pre-spray and extraction, expect one to two fills depending on soil load and how aggressively the operator pre-treats.
Is it loud enough to bother customers?
Single 3-stage motor portables are typically in the 75-80 dB range - similar to a household upright vacuum. Most customers find it acceptable for daytime cleaning.
Heater wattage and warm-up time?
The Ninja Classic with in-line heater warms solution from cold tap to operating temperature in roughly 4 to 6 minutes from a full 12-gallon fill, depending on incoming water temperature. Once warmed, it holds temperature during continuous operation. Hotter water lifts greasy soils faster, which is why most professional crews specify the heated version.
What is the right detergent dose?
Manufacturer guidance is one to two ounces of low-foam carpet detergent per gallon of solution; oversoap creates excess foam in the recovery tank and slows productivity. If a tech keeps tripping the float in the recovery tank, the first thing to check is detergent dose, then defoamer.
Filter and gasket maintenance?
Rinse the dome filter and float assembly daily; replace the dome filter foam every 100-150 operating hours or sooner if it tears. The lid gasket should be inspected weekly for soap or grit residue that breaks the recovery vacuum seal; replace it annually or whenever vacuum performance drops without an obvious blockage upstream.
Discount Cleaning Products is an authorized Ninja and HydraMaster dealer. We work with carpet cleaning service operators, restoration techs, and detail shops daily, so we can talk through whether the NJA500 portable, a heated portable, or a step up to a 12-gallon machine matches the routes you actually run.