RKA4G35NL-C2I Triplex Pump | 4.0 GPM 3500 PSI

RKA4G35NL-C2I by Annovi Reverberi — Industrial Triplex Plunger Pump with Gymatic C2I Unloader and Chemical Injector | 4.0 GPM | 3,500 PSI | Bronze Connecting Rods | Brass Manifold | 45mm Extended Solid Shaft | Belt-Drive and Electric Motor Compatible

The RKA4G35NL-C2I by Annovi Reverberi is a commercial-duty RKA Series industrial triplex ceramic plunger pump engineered for belt-drive and electric motor-driven pressure washing systems requiring 4.0 GPM at 3,500 PSI with factory-integrated downstream chemical injection capability. Rated at 4.0 GPM and 3,500 PSI, the RKA4G35NL-C2I delivers 14,000 cleaning units — combining 4.0 GPM high-volume output with 3,500 PSI cutting pressure for fleet vehicles, construction equipment, agricultural machinery, industrial surfaces, and production facility cleaning — through bronze connecting rods, solid ceramic plungers, precision-machined brass manifold, and a 45mm extended solid shaft purpose-built for v-belt pulley, poly-drive belt, and flexible coupling installations.

The RKA4G35NL-C2I carries the factory-installed C2I Gymatic bolt-on adjustable unloader with integrated downstream soap injection — delivering the complete two-mode wash platform from a single factory-configured, factory-approved assembly with an adjustment range from 200 PSI up to full operating pressure. Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated technical support — this pump arrives pre-filled with factory break-in oil, factory-tested, and ready for installation. Protected by a 5-year US limited warranty and built to be fully rebuilt rather than replaced, the RKA4G35NL-C2I is a long-term industrial investment capable of a decade of productive service life.

Factory-Matched and Approved — The RKA4G35NL-C2I Complete Assembly Advantage

No Mismatches. No Guesswork. No Warranty Risk. Just Install and Run.

Every RKA4G35NL-C2I ships as a factory-matched, factory-approved, and factory-installed complete pump and unloader assembly:

• Factory-matched C2I for 3,500 PSI — the bolt-on Gymatic C2I unloader and integrated injector are factory-calibrated for this pump’s specific 4.0 GPM / 3,500 PSI duty point. Pressure regulation, bypass response, and chemical draw characteristics are factory-set as a complete system.
• Factory-approved configuration — the complete assembly is Annovi Reverberi’s validated specification for this model. Operating with the factory-installed components maintains full 5-year warranty coverage.
• Factory-installed and tested — every RKA4G35NL-C2I exits the manufacturing facility with the C2I assembly mounted, calibrated, and tested for flow, pressure, and leak-free operation before shipment.
• Eliminates mismatch returns — the factory-matched assembly eliminates incorrect unloader or injector specification — the most common source of industrial pump system returns — before the pump leaves the box.
• Installation-ready — connect to the power source via belt coupling, connect system hoses, connect the detergent supply line to the injector port, and start. The RKA4G35NL-C2I arrives engineered, assembled, and ready.

Decoding the RKA4G35NL-C2I Model Number

What Every Segment of This Annovi Reverberi Pump Designation Tells You

• RKA — Pump series: RKA Series industrial triplex plunger pump — Annovi Reverberi’s commercial and industrial belt-drive and electric motor platform
• 4G — Flow rate: 4.0 GPM
• 35 — Maximum pressure: 3,500 PSI — 4.0 × 3,500 = 14,000 cleaning units
• N — Shaft type: Natural / solid shaft — precision-machined solid shaft per Annovi Reverberi model designation convention
• L — Shaft length: 45mm extended solid shaft — purpose-built for v-belt pulley, poly-drive belt, and flexible coupling installations requiring additional engagement depth beyond standard shaft length
• C2I — Unloader and injector: Gymatic C2 bolt-on adjustable unloader with integrated downstream chemical injector — factory-matched and factory-installed; adjustable from 200 PSI to full operating pressure

Key Specifications

RKA4G35NL-C2I Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute)
• Maximum Pressure: 3,500 PSI
• Cleaning Units: 14,000 (GPM × PSI)
• Pump Type: RKA Series industrial triplex ceramic plunger pump — smooth, low-pulsation output for belt-drive and electric motor systems
• Shaft Type: Natural solid shaft (N designation)
• Shaft Length: 45mm extended solid shaft (L designation) — v-belt, poly-drive belt, and flexible coupling ready
• Manifold Material: Precision-machined brass — corrosion resistance, pressure fatigue resistance, and thermal stability
• Plungers: Solid ceramic — exceptional wear resistance and thermal stability
• Connecting Rods: Bronze — strength and longevity under continuous belt-drive load cycles
• Serviceability: Oil sight glass and vented dipstick for simplified routine maintenance
• Lubrication: Oil-bath crankcase with factory pre-filled break-in oil
• Unloader System: Gymatic C2I bolt-on adjustable unloader with integrated downstream chemical injector — adjustable 200 PSI to maximum; factory-matched and factory-installed
• Unloader Adjustment Range: 200 PSI to maximum operating pressure — widest adjustment range in the library
• Chemical Injector: Included — downstream venturi injector factory-integrated into C2I bolt-on assembly
• Warranty: 5-year limited warranty — US-based coverage through Annovi Reverberi North America

What’s Included in the Box

A Complete, Factory-Configured RKA4G35NL-C2I Assembly Ready for Installation

• Factory-matched Gymatic C2I bolt-on unloader with active chemical injector — installed and calibrated for the 4.0 GPM / 3,500 PSI operating point; injector port ready for detergent supply line connection; adjustable from 200 PSI to full operating pressure
• Banjo bolts and sealing O-rings — standard hardware for C2 family unloader connections; supplied for secure, leak-resistant installation
• Factory break-in oil — crankcase pre-filled to the correct operating level for first startup
• Oil sight glass and vented dipstick — at-a-glance oil level monitoring and simplified oil changes
• Operator’s manual — complete installation, startup, operating, and maintenance procedures including oil change intervals, chemical injector care, and winterization protocol
• Parts schematic — exploded-view diagram with Annovi Reverberi part numbers for every serviceable component

45mm Extended Solid Shaft — Purpose-Built for Belt-Drive Industrial Systems

V-Belt. Poly-Drive. Flexible Coupling. Correct Engagement Depth for Industrial Power Transmission.

• Engineered for belt-coupled installations — the L designation on the RKA4G35NL-C2I confirms the 45mm extended solid shaft, providing the additional engagement depth required for correct v-belt pulley seating, poly-drive belt alignment, and secure fastener retention under industrial operating loads
• Optimal pulley alignment geometry — the extended solid shaft length enables precise pulley positioning on the RKA4G35NL-C2I, supporting correct belt tracking and reducing belt wear from tension misalignment in continuous-duty installations
• Ideal for systems where power source and pump operate at different speeds — belt-drive configurations allow contractors and facility engineers to select the correct pulley ratio to match the pump’s optimal operating speed from a higher-RPM engine or motor, without direct-coupling speed constraints
• Skid-mounted, trailer, and stationary system applications — the RKA4G35NL-C2I’s extended solid shaft and industrial construction make it the correct specification for fixed wash bays, trailer-mounted belt-drive cleaning systems, and production facility installations where long-term continuous operation is standard

C2I Bolt-On Unloader — Two-Mode Platform at 3,500 PSI

Factory-Approved. Wide Adjustment Range. Integrated Chemical Feed. Industrial Belt-Drive Rated.

• 200 PSI to maximum pressure adjustment range — the bolt-on C2I assembly on the RKA4G35NL-C2I offers the widest pressure adjustment range in this product library, giving operators precise control across the full spectrum from gentle detergent pre-soak to maximum 3,500 PSI rinsing impact
• Integrated downstream injection — draws detergent, degreaser, or cleaning solution when the operator switches to low-pressure application mode. No separate injector hardware required on the RKA4G35NL-C2I.
• Two-mode workflow at 4.0 GPM / 3,500 PSI — chemical pre-soak breaks down grease, road film, and industrial contamination; full 3,500 PSI / 4.0 GPM rinse removes loosened material at 14,000 cleaning units. Switch between modes without changing tools.
• Internal bypass design — smooth pressure transitions at trigger release protect hoses, guns, and downstream accessories throughout the RKA4G35NL-C2I’s operating range
• Simplified plumbing — bolt-on integrated C2I assembly reduces external components, shortens installation time, and improves overall system reliability
• Injector maintenance — flush the injector circuit with clean water after every detergent session to preserve long-term venturi function

Heavy-Duty Construction for Continuous Belt-Drive Operation

Bronze Rods. Ceramic Plungers. Brass Manifold. Built for Extended Industrial Duty Cycles.

• Bronze connecting rods on the RKA4G35NL-C2I provide the fatigue resistance and load-bearing strength required for continuous industrial belt-drive pressure washing cycles
• Solid ceramic plungers deliver excellent wear resistance and thermal stability, reducing seal wear and extending maintenance intervals across extended-duty belt-drive cycles
• Precision-machined brass manifold resists corrosion and pressure fatigue in demanding cleaning environments where detergents, temperature variation, and continuous cycling are standard conditions on the RKA4G35NL-C2I
• Lower operating RPM via belt-drive reduction — belt-drive configurations allow the RKA4G35NL-C2I to operate at reduced RPM compared to direct-drive alternatives, lowering friction, thermal load, and internal component stress for extended service intervals

Typical Applications

Where the RKA4G35NL-C2I Delivers Best Results

• Belt-drive pressure washer skids for commercial contractors — the RKA4G35NL-C2I’s 45mm extended solid shaft and factory-matched C2I assembly support reliable integration into contractor belt-coupled cleaning systems
• Trailer-mounted wash systems requiring extended runtimes — belt-drive operation at reduced RPM delivers cooler, quieter performance across long production cleaning days on mobile contractor rigs
• Stationary industrial wash bays powered by electric motors — fixed facility installations where the RKA4G35NL-C2I’s industrial construction and integrated two-mode capability support continuous production washdown operations
• Fleet maintenance facilities for trucks, buses, and heavy vehicles — integrated chemical injection and 3,500 PSI / 4.0 GPM output handle fleet vehicle contamination efficiently in production wash bay environments
• Construction and earthmoving equipment washdown — 14,000 cleaning units of output handles the heaviest construction site contamination on equipment yards and job sites
• Agricultural equipment and farm maintenance — tractors, harvesters, and agricultural facilities where the RKA4G35NL-C2I’s two-mode capability handles varied contamination across belt-drive-powered field cleaning systems
• Manufacturing and processing facilities — dedicated belt-drive pump systems in production environments where consistent industrial output and extended service intervals minimize unplanned downtime

5-Year US Warranty, Full Rebuildability, and Wholesale Pricing

Industrial RKA Series Performance Backed by Domestic Support

The RKA4G35NL-C2I is protected by Annovi Reverberi’s 5-year limited warranty through the US-based warranty and service network. Every internal wear component — solid ceramic plungers, bronze connecting rods, brass manifold seals and o-rings, Gymatic C2I bolt-on unloader service parts, piston packing kits, and crankcase bearings — is stocked domestically through authorized distribution channels. Contractors, industrial facility managers, fleet operators, municipal purchasing departments, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the RKA4G35NL-C2I and the complete Annovi Reverberi pump and unloader assembly line. 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.

14,000 Cleaning Units. 3,500 PSI. 4.0 GPM. 45mm Extended Shaft. Factory-Matched C2I. Two-Mode.

Italian Engineering. Industrial Belt-Drive Platform. Factory-Approved Assembly. US Warranty Coverage.

For contractors, fleet operators, industrial maintenance teams, agricultural operations, and facility managers who need 4.0 GPM at 3,500 PSI on a belt-drive or electric motor platform — with a 45mm extended solid shaft for correct pulley engagement in v-belt and poly-drive belt installations, factory-matched Gymatic C2I bolt-on unloader with integrated chemical injection and a 200 PSI to maximum adjustment range, bronze connecting rods and ceramic plungers for continuous industrial duty, and a completely rebuildable platform backed by a 5-year US warranty — the RKA4G35NL-C2I delivers a purpose-engineered industrial solution from one of the global pressure pump industry’s most trusted manufacturers. Fourteen thousand cleaning units. Extended solid shaft. Two-mode chemical capability. Five years of US warranty. A decade of service life.

Volume buyers can reach the WSHPWR wholesale team directly at wholesale@wshpwr.com to discuss pricing for quantity purchases across the complete Annovi Reverberi lineup.