AR RSV4G36-PKG Pump Kit

Introduction
When it comes to building or upgrading a pressure washer, one of the smartest investments you can make is in a high-flow pump. More water volume means faster rinsing, wider coverage, and better results when using attachments like surface cleaners. The Annovi Reverberi RSV4G36-PKG Pump Kit is one of the most popular choices for this type of build.
Delivering 4.0 GPM at 3600 PSI, this horizontal hollow-shaft triplex pump provides professional performance for contractors, rental shops, and serious DIYers. Designed to mount directly onto popular small engines like the Predator 420cc from Harbor Freight or the Honda GX390, the RSV4G36-PKG makes it easy to assemble a machine that rivals commercial units costing twice as much.

Why Choose the RSV4G36-PKG?
The RSV4G36-PKG hits the sweet spot between water flow and pressure. At 4.0 gallons per minute, you get significantly more rinsing power than standard 3.0 GPM units—without sacrificing the high-pressure output needed for cutting through grime.
Key Advantages:

• Increased Flow → Faster rinsing, better results with surface cleaners, and less cleaning time.
• Professional Pressure → 3600 PSI handles tough stains, grease, mildew, and debris.
• Durable Triplex Design → Forged brass manifold, stainless steel plungers, oversized bearings, and rebuildable components.
• Direct Engine Mounting → 1” hollow shaft bolts directly to horizontal shaft engines in the 13–15 HP class.
• Complete Package → Includes thermal relief valve for pump protection and chemical injector for detergent application.

This pump package is built for professionals but priced in a way that makes it accessible for homeowners who want serious cleaning power.

Engine Compatibility – Predator and Honda
One of the best features of the RSV4G36-PKG is its easy engine compatibility. It is designed for engines in the 13–15 HP range with a 1” hollow shaft, making it a direct bolt-on solution for the most popular small engines on the market.
Compatible Engines:

• Predator 420cc Horizontal Shaft Engine – Affordable and widely available at Harbor Freight.
• Honda GX390 Horizontal Shaft Engine – Contractor-grade reliability with industry-leading longevity.
• Briggs & Stratton and Kohler Equivalents – Popular alternatives in the same HP class.

Whether you choose the cost-effective Predator or the premium Honda, the RSV4G36-PKG ensures a perfect power match.

Technical Specifications

• Max Pressure: 3600 PSI
• Flow Rate: 4.0 GPM
• Engine Shaft: 1” hollow shaft (direct bolt-on)
• Construction: Forged brass pump head, stainless steel plungers, oversized bearings
• Oil Capacity: Large crankcase with sight glass for long service intervals
• Protection: Thermal relief valve to prevent overheating during bypass cycles
• Chemical Injection: Built-in soap/detergent injection system

These specs put the RSV4G36-PKG in a class above consumer-grade pumps, offering professional performance at an affordable price.

Building Your Own Predator-Powered Pressure Washer
Pairing this pump with a Predator 420cc engine from Harbor Freight is one of the most cost-effective ways to create a contractor-grade washer.
DIY Build Steps:

1. Choose Your Engine – Predator 420cc for budget-friendly power, or Honda GX390 for maximum durability.
2. Bolt the Pump – Direct-mount the RSV4G36-PKG to the crankshaft with the included flange hardware.
3. Hook Up Hoses – Attach your garden hose inlet, high-pressure hose outlet, and spray gun.
4. Install Soap Line – Connect the detergent injector for cleaning chemicals.
5. Add Oil and Fuel – Fill with recommended non-detergent pump oil and engine fuel.
6. Start Cleaning – Fire up the engine and enjoy 3600 PSI at 4.0 GPM.

This plug-and-play setup makes it easy to go from parts to a working, professional-grade washer in less than an hour.

Applications – Where the RSV4G36-PKG Excels
With high flow (4.0 GPM) and professional pressure (3600 PSI), this pump package is versatile enough for residential, commercial, and contractor jobs.
Residential Cleaning:

• Driveways, sidewalks, and patios
• Vinyl siding, brick, and stucco
• Pool decks, fences, and outdoor furniture
• Vehicle, RV, and boat washing

Commercial & Contractor Cleaning:

• Surface cleaning with 20”–30” rotary cleaners
• Fleet washing for trucks, buses, and vans
• Rental fleet pressure washers for frequent use
• Construction and farm equipment washing
• Property maintenance for apartment complexes and HOAs

The RSV4G36-PKG is ideal for anyone who needs speed, coverage, and reliability.

Predator Engine Pairing – Smart and Affordable
Predator engines have become extremely popular in the pressure washer building community because they combine affordability and availability with enough horsepower to run professional-grade pumps.

• Budget-Friendly → Predator engines cost significantly less than many branded alternatives.
• Powerful → The 420cc model has plenty of torque to drive 4.0 GPM at 3600 PSI.
• Accessible Nationwide → Harbor Freight makes it easy to find engines and replacement parts.
• Durable Match → When paired with AR’s triplex pumps, Predator-powered washers rival commercial units costing $1,500+.

This makes the Predator + AR pump combo one of the smartest and most cost-effective ways to build a pressure washer.

Why 4.0 GPM @ 3600 PSI Is the Sweet Spot
Many buyers focus on maximum PSI alone, but flow rate (GPM) is just as important—especially for surface cleaning and rinsing.

• Higher Flow = Faster Rinsing → Covers more area per pass.
• Balanced Pressure = Safe Power → 3600 PSI is strong enough for contractors but safe for most residential surfaces.
• Optimized for Attachments → Perfect match for rotary surface cleaners, turbo nozzles, and foam cannons.

This balance of flow and pressure makes the RSV4G36-PKG an excellent all-around performer.

Long-Term Durability
Unlike disposable consumer pumps, the RSV4G36-PKG is a triplex plunger pump—designed to be rebuilt and serviced.

• Forged Brass Manifold → Resists corrosion and high heat.
• Stainless Steel Plungers → Withstand abrasion and extend pump life.
• Oversized Bearings → Support continuous-duty operation.
• Service Kits Available → Replace seals, valves, and pistons to keep the pump running for years.

This means your investment lasts longer and can be maintained instead of replaced.

Conclusion
The AR RSV4G36-PKG Pump Kit is the perfect foundation for a high-flow, professional-grade pressure washer. With 4.0 GPM at 3600 PSI, it offers more coverage and rinsing power than standard 3.0 GPM units while maintaining the cutting strength contractors and homeowners need.
By pairing it with a Predator 420cc engine from Harbor Freight or a Honda GX390, you can build a washer that rivals many $1,500+ commercial machines—at a fraction of the cost.
 If you want to clean faster, cover more ground, and enjoy the reliability of a rebuildable AR pump, the RSV4G36-PKG is the go-to choice for contractors, rental shops, and serious DIYers.

For additional industry standards and technical resources, visit: https://www.pumps.org/