RKV4G40-PKG | 4.0 GPM 4000 PSI Triplex Pump Kit, Manual Included

RKV4G40-PKG by Annovi Reverberi — Complete Triplex Pump Package | 4.0 GPM | 4,000 PSI | Bronze Connecting Rods | Forged Brass Manifold | Gymatic C2 Unloader | F24 SAE J609a 1″ Shaft | Direct Drive Gas Engine | 16,000 Cleaning Units

The RKV4G40-PKG by Annovi Reverberi is a complete, installation-ready triplex ceramic plunger pump package engineered for direct drive gas engine-powered pressure washing systems requiring 4.0 GPM at 4,000 PSI. Rated at 4.0 GPM and 4,000 PSI, the RKV4G40-PKG delivers 16,000 cleaning units — the output of a serious professional cleaning platform built for contractor rigs, fleet wash bays, agricultural operations, industrial facilities, and high-demand municipal cleaning systems — through bronze connecting rods, solid ceramic plungers, a forged brass manifold, stainless steel valves, dual redundant packing, and an F24 SAE J609a direct-drive flange with 1″ shaft. Every fitting, every bolt, the unloader, and the manual ship in one organized box. Mount it. Connect it. Wash. As part of Annovi Reverberi’s pump and unloader assemblies stocked and supported by WSHPWR, the RKV4G40-PKG is the complete answer for operators who need 4,000 PSI without the sourcing headache.

The RKV4G40-PKG is a factory-engineered, factory-assembled, factory-tested complete system — designed by Annovi Reverberi in Modena, Italy and distributed across North America by AR North America. Whether you are replacing a worn pump on a contractor trailer, building a new skid for a fleet wash bay, specifying a pump for an OEM installation, or outfitting a Predator-powered flatbed with multiple high-output wash stations — the RKV4G40-PKG eliminates every compatibility question before the box is opened. Protected by a 5-year US limited warranty and built to be fully rebuilt rather than replaced, this is a decade-of-service investment.

Everything in One Box — The RKV4G40-PKG Complete Package Contents

No Return Trips. No Guesswork. No Compatibility Risk. Same-Day Install.

Open the RKV4G40-PKG box and find everything required for a complete engine-to-pump installation:

• RKV4G40 triplex ceramic plunger pump — factory-tested and pre-lubricated with break-in oil. Bronze connecting rods, solid ceramic plungers, forged brass manifold, stainless steel valves, dual redundant packing, oversized crankshaft bearings — factory-installed and factory-verified. Ready to mount.
• Gymatic C2 adjustable unloader with banjo bolts and sealing O-rings — factory-matched and factory-installed for the 4.0 GPM / 4,000 PSI duty point. Smooth pressure regulation and safe bypass from first startup. The right unloader for this pump. Already on it.
• Fittings and mounting hardware — every fitting and fastener required for integration onto contractor skids, fleet wash frames, flatbed rigs, and OEM installations. Organized in the box. Nothing to source separately.
• Chemical injector and suction hose — not included — the RKV4G40-PKG delivers straight 4,000 PSI high-pressure water output. When detergent capability is required, a downstream chemical injector and suction assembly are sourced separately and connected to the system outlet. This lets operators choose the injector draw rate and connection style that matches their specific cleaning program.
• Factory break-in oil — crankcase pre-filled. First-startup protection already handled.
• Oil sight glass and vented dipstick — at-a-glance oil monitoring from day one.
• Installation and service manual with illustrated parts breakdown — complete setup, operating, service, and rebuild procedures with Annovi Reverberi part numbers for every component. Torque guidance included. AR North America parts availability confirmed across North America.

Decoding the RKV4G40-PKG

What This Annovi Reverberi Pump Package Designation Tells You

• RKV — Pump series: RKV Series heavy-duty triplex plunger pump — Annovi Reverberi’s professional commercial and industrial gas engine pump platform
• 4G — Pump series identifier for this RKV configuration
• 40 — Maximum pressure: 4,000 PSI — 4.0 × 4,000 = 16,000 cleaning units
• PKG — Complete package: pump, Gymatic C2 unloader with banjo bolts, fittings, mounting hardware, manual, and factory break-in oil — everything required for a complete engine-to-pump installation in one organized box

Key Specifications

RKV4G40-PKG Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute)
• Maximum Pressure: 4,000 PSI
• Cleaning Units: 16,000 (GPM × PSI)
• Operating Speed: 3,400 RPM — direct drive gas engine
• Pump Type: RKV Series triplex ceramic plunger pump
• Flange: F24 — SAE J609a, 1″ hollow keyway shaft, direct drive gas and diesel engine compatible (Annovi Reverberi part AR41866)
• Connecting Rods: Bronze — required specification for sustained 4,000 PSI continuous-duty operation
• Manifold: Forged brass — maximum corrosion resistance, thermal stability, and structural integrity under high-pressure sustained operation
• Plungers: Solid ceramic — abrasion, heat, and chemical exposure resistance
• Valves: Stainless steel inlet and discharge — fast response, reliable sealing, long-term corrosion resistance
• Packing: Dual redundant — extended seal longevity and improved uptime in continuous-duty environments
• Volumetric Efficiency: Approximately 93% — optimal power transfer and reduced operating heat
• Bearings: Oversized crankshaft — drivetrain stability and reduced wear at 3,400 RPM operating speed
• Lubrication: Vented oil-bath crankcase — continuous lubrication and temperature management during long duty cycles
• Unloader: Gymatic C2 — factory-matched, factory-installed, banjo bolts and O-rings included
• Chemical Injector: Not included — straight 4,000 PSI water output; downstream injector sourced separately
• Warranty: 5-year limited warranty — US-based coverage through Annovi Reverberi North America

Engine Compatibility — What Drives the RKV4G40-PKG

F24 SAE J609a. 1″ Hollow Keyway Shaft. Predator-Compatible. Broad Engine Range.

The RKV4G40-PKG‘s F24 SAE J609a direct-drive flange accepts a 1″ hollow keyway shaft. At 4,000 PSI and 4.0 GPM, engine horsepower is critical — the right engine pairing protects both the engine and the pump at continuous operating pressure. Confirmed compatible platforms include:

• Harbor Freight Predator 420cc / 13 HP — widely used in contractor builds and micro-OEM pressure wash systems. Direct value-priced replacement for Honda GX390, Briggs & Stratton XR2100, and Kohler CH440 engines. Compatible with the RKV4G40-PKG F24 1″ keyway shaft — confirm engine HP is appropriate for your intended duty cycle at 4,000 PSI before building.
• Harbor Freight Predator 459cc / 15.8 HP Max Performance — up to 10% more torque than the standard 420cc. The preferred single-cylinder Predator pairing for sustained 4,000 PSI continuous-duty operation. Direct replacement for Honda GX390, Briggs & Stratton XR2100, and Kohler CH440. Compatible with the RKV4G40-PKG F24 1″ keyway shaft — the right choice for operators who want additional power overhead at 4,000 PSI.
• Harbor Freight Predator 670cc / 22 HP V-Twin — for sustained 4,000 PSI continuous-duty operation on contractor flatbed rigs and fleet wash installations requiring maximum engine overhead. Replaces Honda GX630/660/690 and Briggs & Stratton Vanguard configurations at substantial cost savings.
• Honda GX390 — 389cc, 1″ SAE J609a keyway shaft. The benchmark commercial pressure washer engine. Direct-mount compatible with the RKV4G40-PKG F24 flange.
• Briggs & Stratton XR2100 / Vanguard series — 420cc and above, 1″ SAE keyway. Direct-mount compatible.
• Kohler CH440 / Command series — 429cc, 1″ SAE keyway. Direct-mount compatible.
• Compatible diesel engines — any gas or diesel engine with a 1″ SAE J609a horizontal keyway shaft at 3,400 RPM and sufficient horsepower for 4,000 PSI operation is compatible with the RKV4G40-PKG F24 direct-drive flange.

Built for the Predator-Powered Contractor Rig

Flatbed Build. Multi-Unit. Maximum Output Per Dollar Invested.

• Build your own system — own the savings and the quality — a Predator 670cc paired with the RKV4G40-PKG delivers 16,000 cleaning units of sustained commercial output at a fraction of the cost of a comparable OEM-assembled pressure washer. The contractor who builds their own system specifies the components, controls the quality, and keeps the margin.
• Standardize your flatbed for maximum uptime — contractors running multiple identical Predator/RKV4G40-PKG stations on a flatbed pickup or trailer gain standardized parts, standardized procedures, and standardized performance across every unit. When one pump needs a rebuild, every unit on the rig uses the same seal kit, the same valve set, the same packing.
• AR North America national parts network — every wear component in the RKV4G40-PKG is stocked through AR North America’s domestic distribution. Rebuild kits, packing kits, valve assemblies, C2 unloader service parts — available nationally. One call. The rig keeps running.
• 16,000 cleaning units per station — at 4.0 GPM and 4,000 PSI, each RKV4G40-PKG station on a multi-unit flatbed delivers serious commercial output. Multiply that across two, three, or four stations and the economics of building your own system become obvious.

93% Volumetric Efficiency and Dual Redundant Packing — Why This Pump Runs Longer

More Output Per HP. Less Heat Under Load. Extended Service Intervals.

• 93% volumetric efficiency at 4,000 PSI — the RKV4G40-PKG’s precision internal hydraulic design transfers approximately 93% of engine input energy into usable water flow at the outlet. At 4,000 PSI operating pressure, efficiency directly impacts operating temperature — a more efficient pump runs cooler, which means longer ceramic plunger life, longer packing life, and longer valve life across high-demand commercial duty cycles.
• Dual redundant packing system — two independent sealing stages on each plunger deliver twice the sealing protection of single-stage designs. Extended service intervals and reduced leakage risk across the stop-start cycles of contractor and fleet cleaning operations at 4,000 PSI.
• Forged brass manifold for thermal cycling resistance — the RKV4G40-PKG’s forged brass construction withstands the repeated thermal cycling and vibration common in contractor environments, maintaining structural integrity across seasons and duty cycles that cast alternatives cannot match.
• Oversized crankshaft bearings — stabilize the drivetrain at 3,400 RPM, reducing wear and vibration across long daily duty cycles. Accessible valve caps allow rapid servicing and on-site rebuilds without removing the pump from the frame.

Typical Applications

Where the RKV4G40-PKG Delivers Best Results

• Contractor rigs — concrete cleaning, restoration, and surface preparation — the RKV4G40-PKG’s 4,000 PSI output and complete factory package give contractors a drop-in-ready high-pressure solution for concrete, brick, and surface prep work where maximum impact force is the priority
• Fleet and transportation washing — trucks, buses, trailers, and heavy equipment where 4.0 GPM output and 4,000 PSI cleaning force handle fleet vehicle contamination at professional duty cycles on gas engine-powered portable and stationary wash systems
• Agricultural washdown — tractors, implements, and livestock facilities where the RKV4G40-PKG’s high-output complete package and bronze rod continuous-duty construction support demanding agricultural cleaning programs
• Industrial wash stations — machinery, conveyors, and processing equipment where 16,000 cleaning unit output and sustained 4,000 PSI performance meet the demands of continuous industrial washdown programs
• Food and beverage sanitation systems — when used with approved cleaning agents and appropriate sanitation procedures, the RKV4G40-PKG supports USDA-compliant wash station builds
• Municipal service operations — garage cleaning, public works maintenance, and city fleet washing where standardized, rebuildable pump packages with national parts availability support scheduled municipal cleaning programs

5-Year US Warranty, National Parts Availability, and Wholesale Pricing

Built in Italy. Distributed Across North America. Backed for Five Years.

The RKV4G40-PKG is protected by Annovi Reverberi’s 5-year limited warranty through the US-based warranty and service network administered by AR North America. Every internal wear component — ceramic plungers, bronze connecting rods, forged brass manifold seals and o-rings, stainless valve seats, Gymatic C2 unloader service parts, dual redundant packing kits, and oversized crankcase bearings — is stocked nationally through authorized AR North America distribution channels. Contractors, fleet operators, agricultural operations, industrial facility managers, OEM equipment builders, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the RKV4G40-PKG and the complete WSHPWR pump package lineup. WSHPWR maintains one of the most complete Annovi Reverberi inventories available through any US web store — with thousands of products in stock and a continually expanding catalog.

16,000 Cleaning Units. 4,000 PSI. 4.0 GPM. F24 SAE J609a. Gymatic C2. Bronze Rods. Everything in One Box.

Italian Engineering. Predator-Compatible. Complete Factory Package. 5-Year US Warranty.

Stop sourcing components one at a time. Stop guessing at unloader compatibility. The RKV4G40-PKG is the complete Annovi Reverberi pump package for contractors, fleet operators, agricultural teams, industrial facilities, OEM builders, and Predator-powered rig operators who need 4.0 GPM at 4,000 PSI with zero installation surprises. Bronze connecting rods. Forged brass manifold. Dual redundant packing. 93% volumetric efficiency. Gymatic C2 unloader. Every fitting and every bolt. Factory-tested. Pre-lubricated. Five-year US warranty. One box. Same-day install.

Volume buyers and contractors building multi-unit systems can reach the WSHPWR wholesale team directly at wholesale@wshpwr.com to discuss pricing across the complete Annovi Reverberi pump package lineup.