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Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390

Mi-T-M JP-4004-3MHB Gas Pressure Washer – 4000 PSI, 3.5 GPM, Honda GX390

Brand: Mi-T-MSKU: JP-4004-3MHBIn Stock – Ready to Ship
$2,700.00
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JP-4004-3MHB Gas Pressure Washer — JP Series 4000 PSI with Honda GX390

The JP-4004-3MHB is the highest-output model in Mi-T-M's JP Series, producing 4000 PSI at 3.5 GPM — 14,000 cleaning units — from a 389cc Honda GX390 OHV engine paired with an AR crankshaft pump. At 14,000 CU it delivers 56 percent more cleaning power than a standard 3000 PSI / 3.0 GPM unit and is ETL listed for US use. Buyers comparing the 3MHB (Honda GX390) variant against lesser JP models should note this is the only JP-4004 configuration; at 4000 PSI the AR pump requires the GX390's displacement to maintain rated flow under sustained load.

JP-4004-3MHB Cleaning Output and Engine Performance

At 14,000 CU the JP-4004-3MHB handles jobs that exceed the capacity of 3500 PSI units — stripping loose paint from concrete block, washing enclosed trailers that carry livestock or agricultural product residue, and cleaning large building facades in fewer passes. The Honda GX390 is factory-recommended for commercial equipment at this output level and is the engine choice for buyers with established Honda dealer service relationships.

  • 4000 PSI at 3.5 GPM (14,000 CU) — the highest cleaning output in the JP Series; handles paint stripping and heavily fouled industrial surfaces
  • 389cc Honda GX390 OHV engine — commercial-duty displacement; Honda's global dealer network covers parts and service in most markets
  • AR crankshaft pump, forged brass manifold — crankshaft design sustains continuous-duty operation; brass manifold resists corrosion from mineral-laden water
  • ETL listed — independently verified for electrical and mechanical safety to US standards
  • Thermal relief valve and in-line water strainer — thermal valve prevents pump damage during trigger-closed idle; strainer catches particulates before they reach pump valves
  • 50-ft × 3/8-in non-marking hose, 48-in lance, 10-in flat-free tires — 50-ft reach covers most truck bays; flat-free tires maintain mobility regardless of debris on site

JP-4004-3MHB Applications and Environments

Industrial cleaning contractors use the JP-4004-3MHB where 3500 PSI units leave contaminant behind — paint prep on concrete and masonry, washing heavily fouled livestock trailers, and cleaning chemical plant exteriors. Fleet operations that service tanker trucks and bulk carriers benefit from the 14,000 CU output when stripping road film from large surface areas in a single shift. Property restoration companies use it on building facades before coating application. Municipalities apply it to graffiti removal from concrete and masonry where lower-output washers require chemical pre-treatment to compensate.

JP-4004-3MHB GPM, PSI, and Nozzle Configuration

Rated at 3.5 GPM at 4000 PSI (14,000 cleaning units) at rated flow. Includes quick-connect nozzles in 0°, 15°, and 25° patterns; 50-ft × 3/8-in non-marking high-pressure hose; 48-in lance with insulated trigger gun. Cold water only. 49-state engine — not for sale in California.

Specifications

PSI 4000 PSI at rated flow
GPM 3.5 GPM
Cleaning Units 14,000 CU (PSI × GPM)
Engine 389cc Honda GX390 OHV
Pump Type AR Crankshaft
Unloader Mi-T-M Adjustable Pressure
Hose 50 ft × 3/8 in non-marking
Lance 48 in
Nozzles Included 0°, 15°, 25° quick-connect
ETL Listed Yes
Net Weight 142 lbs
Dimensions (L × W × H) 40 × 22.5 × 24.5 in
Hot/Cold Cold water only
California Sale Not for sale in CA (49-state engine)

Documents

Spec Sheet
Manual

Video Overview

TypeCart
Pressure4000 PSI
Flow Rate3.5 GPM
Water TempCold
PowerGasoline
EngineHonda

Product Warranty Information

"1 Year Unloader, 3 Year Honda Engine, 7 Year Pump"

B2B & Tax-Exempt Purchases

We supply contractors, restoration companies, property managers, schools, government agencies, and other tax-exempt organizations.

How to place a tax-exempt order:

  1. Write to us through our Contact Us page or email info@uscleaningtools.com and attach your valid tax exemption certificate (state resale or exemption certificate).
  2. We verify your certificate and mark your account tax-exempt — usually within one business day.
  3. Place your order and sales tax will not be charged.

For volume pricing or purchase orders, call +1 (978) 295-7538.

Shipping & Returns

Free shipping on most brands for orders over $300, delivered to the lower 48 states. Any brand-specific freight rate is shown at checkout before you pay.

Processing & delivery: in-stock orders are processed within 1–2 business days and typically deliver in 5–7 business days. Tracking is emailed within 24 hours of shipment. Built-to-order and backordered equipment shows its lead time on this page.

Freight deliveries: inspect your equipment on arrival and note any damage on the delivery receipt. Items damaged in transit or defective on arrival are fully covered at no cost to you.

Cancellations: cancel any time before your order ships for a full 100% refund.

30-day returns: return unused equipment in its original packaging within 30 days of delivery. Change-of-mind returns are subject to a restocking fee. To start a return, email info@uscleaningtools.com or call +1 (978) 295-7538.

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Frequently Asked Questions

What cleaning units does the JP-4004-3MHB produce and how does that compare to smaller JP models?
The JP-4004-3MHB produces 4000 × 3.5 = 14,000 cleaning units. The JP-3504 produces 12,250 CU (14% less) and the JP-3003 produces 9,000 CU (36% less). At 14,000 CU the 4004 handles paint stripping and heavily fouled surfaces where the 3504 would require additional passes.
Why does the JP-4004 only come in the Honda GX390 configuration?
At 4000 PSI / 3.5 GPM the AR crankshaft pump requires the torque and displacement of the 389cc GX390 to maintain rated flow under sustained load. The Mi-T-M OHV and Kohler CH440 variants are available on the JP-3504 (3500 PSI) frame for buyers who prefer those engine platforms.
What does ETL listed mean on the JP-4004-3MHB?
ETL listing means the JP-4004-3MHB was independently tested and certified by Intertek (ETL) to meet applicable US safety standards. This is equivalent in standing to UL listing and is accepted by local inspection authorities for commercial use.
Is the JP-4004-3MHB suitable for paint stripping?
The JP-4004-3MHB at 4000 PSI and 14,000 CU can strip loose and peeling paint from concrete, masonry, and wood. For intact coatings on harder substrates, a surface cleaner attachment or chemical stripper pre-treatment will improve results. Always test on a small area first to confirm material compatibility.
Can the JP-4004-3MHB be sold in California?
No. The Honda GX390 on the JP-4004-3MHB is a 49-state engine that does not meet CARB small engine emissions regulations. It cannot be sold or operated in California. A CARB-compliant configuration is not available in this series.
What pump protection features does the JP-4004-3MHB include?
The AR crankshaft pump includes a forged brass manifold (corrosion resistant), thermal relief valve (releases water when trigger is held closed to prevent heat damage), and in-line water strainer (removes particulates before they reach pump valves). The Mi-T-M Pressure Relief Start unloader also allows engine start without pump pressure build-up.

Frequently Asked Questions

1. What payment methods can I use?

We accept Visa, MasterCard, American Express, Diners Club, Discover, major debit cards, and digital wallets like PayPal, Google Pay, Meta Pay, and Apple Pay.

2. When will my payment be processed?

Your credit/debit card or PayPal account will be charged when you place your order. Secure payment processing protects your information.

3. Will I receive an order confirmation?

Yes, a confirmation email will be sent to the provided email address once the order is placed.

4. How long does it take to process an order?

Orders are processed within 1-2 business days and then prepared for shipment.

5. How long does it take for my order to arrive?

Estimated arrival time (ETA) is 5-7 business days for all orders.

6. Do you offer warranty?

All our products come with a manufacturer warranty of at least 1 year, depending on the brand.

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