RRA4G40-VRT-PKG | 4.0 GPM 4000 PSI Triplex Pump, VRT Unloader

RRA4G40-VRT-PKG by Annovi Reverberi — Complete VRT Plumbed RRA Series Belt Drive Triplex Pump Package | 4.0 GPM | 4,000 PSI | Bronze Connecting Rods | Forged Brass Manifold | 24mm Solid Keyed Shaft | VRT Unloader with Easy Start | Auto-Reset Thermal Relief | 16,000 Cleaning Units

The RRA4G40-VRT-PKG by Annovi Reverberi is a complete, factory-assembled VRT plumbed RRA Series belt drive triplex ceramic plunger pump package engineered for belt and pulley-driven pressure washing systems requiring 4.0 GPM at 4,000 PSI with fully integrated pressure regulation, Easy Start, and automatic thermal protection. Rated at 4.0 GPM and 4,000 PSI, the RRA4G40-VRT-PKG delivers 16,000 cleaning units — through bronze connecting rods, solid ceramic plungers, a forged brass manifold, stainless steel valves, dual redundant packing, oversized crankshaft bearings, and a 24mm solid keyed shaft for belt drive pulley systems where operating speed is tuned through pulley ratio selection. As part of Annovi Reverberi’s pump and unloader assemblies stocked and supported by WSHPWR, the RRA4G40-VRT-PKG is the complete belt drive answer for contractors, OEM builders, fleet operators, and industrial facilities who need 4,000 PSI with factory-integrated VRT pressure management, thermal protection, and Easy Start in one organized box.

The RRA4G40-VRT-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. The VRT plumbed package format means the unloader is factory-plumbed with the bypass recirculation loop, automatic thermal relief valve, Easy Start bypass circuit, and all hardware connected and verified before shipment. Protected by a 5-year US limited warranty and built to be fully rebuilt rather than replaced, the RRA4G40-VRT-PKG is a decade-of-service investment in the standard RRA belt drive VRT plumbed specification.

Everything in One Box — The RRA4G40-VRT-PKG Complete VRT Plumbed Package

Factory-Plumbed. Factory-Tested. Belt Drive Ready. Nothing Left to Source.

Open the RRA4G40-VRT-PKG box and find a complete, factory-plumbed, belt drive-ready installation:

• RRA4G40 triplex ceramic plunger pump with 24mm solid keyed shaft — 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. 24mm solid crankshaft accepts belt drive pulleys for operating speed tuned through pulley ratio to any engine or motor platform. Ready to mount.
• VRT external bypass unloader — factory-plumbed and pressure-set — the VRT unloader is factory-calibrated for the 4.0 GPM / 4,000 PSI duty point and plumbed into the complete bypass circuit before shipment. Smooth pressure regulation, controlled bypass, and stable output from first startup.
• Easy Start feature — at startup, the VRT bypass circuit opens and the pump starts against zero back pressure. The drive engages freely through belt and pulley without hydraulic resistance. Belt tension, pulley loading, and startup torque are at their lowest stress point every time the system starts. Once operating speed is reached, the bypass closes and the system builds to 4,000 PSI. Easier starts. Reduced belt wear. Longer drive component life.
• Exterior bypass recirculation loop — factory-plumbed — bypass circuit factory-assembled and connected. Controlled water flow during trigger-off intervals, protection from pressure spikes throughout the cleaning cycle.
• Automatic Thermal Relief Valve (TRV) — factory-installed in bypass circuit — thermal sensing pill monitors bypass water temperature continuously. When bypass water reaches 124–145°F, the TRV opens automatically — hot water exits, ambient supply water flows in to replace it. Auto-closes when temperature normalizes. No manual reset. Full thermal protection at all times.
• Mounting hardware and fittings — every fitting and fastener for integration onto contractor skids, trailer frames, stationary platforms, and OEM belt drive installations. Organized in the box.
• Chemical injector and suction hose — not included — the RRA4G40-VRT-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.
• Factory break-in oil — crankcase pre-filled. Oil sight glass and vented dipstick for ongoing monitoring.
• Operator’s manual and service schematics — complete installation, operating, service, and rebuild procedures with Annovi Reverberi part numbers for every serviceable component.

Decoding the RRA4G40-VRT-PKG

What Every Segment of This Annovi Reverberi Package Designation Tells You

• RRA — Pump series: RRA Series triplex plunger pump — Annovi Reverberi’s commercial belt drive and pulley drive platform
• 4G — Pump series identifier for this RRA configuration
• 40 — Maximum pressure: 4,000 PSI — 4.0 × 4,000 = 16,000 cleaning units
• VRT — Unloader family: VRT Series external bypass unloader — factory-plumbed with Easy Start, bypass recirculation loop, and auto-reset TRV thermal protection
• PKG — Complete VRT plumbed package: pump plus fully integrated VRT plumbing assembly — everything in one factory-assembled, factory-tested box

RRA4G40-VRT Belt Drive Family — Standard vs Anodized Crankcase

Both models share the RRA Series platform, 4,000 PSI rating, bronze connecting rods, forged brass manifold, 24mm solid keyed shaft, VRT unloader, Easy Start, and auto-reset TRV. Crankcase specification drives the selection:

• RRA4G40-VRT-PKG (this model) — Standard aluminum crankcase. The correct specification for belt drive installations in clean, protected environments with standard wash-down conditions.
• RRA4G40-VRT-PKG-A — Anodized aluminum crankcase. Electrochemically hardened surface for operators in agricultural chemical environments, coastal installations, food processing facilities, or industrial environments with airborne particulate or chemical vapors where the crankcase exterior is exposed to corrosive conditions.

Key Specifications

RRA4G40-VRT-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)
• Drive Type: Belt and pulley — operating speed set by pulley ratio selection
• Pump Type: RRA Series triplex ceramic plunger pump — smooth, low-pulsation output; approximately 93% volumetric efficiency
• Shaft: 24mm solid keyed crankshaft — belt drive pulley compatible
• Connecting Rods: Bronze — required specification for sustained 4,000 PSI continuous-duty operation
• Manifold: Forged brass — corrosion resistance and structural integrity under 4,000 PSI
• Plungers: Solid ceramic — wear resistance and low-pulsation smooth flow
• Valves: Stainless steel — reliable sealing and consistent high-pressure performance
• Bearings: Oversized crankshaft — drivetrain stability under heavy belt tension and continuous load
• Packing: Dual redundant — twice the sealing life and reduced downtime
• Volumetric Efficiency: Approximately 93% — excellent power transfer and cooler operation
• Lubrication: Vented oil-bath crankcase — continuous lubrication and thermal management
• Unloader System: VRT external bypass — factory-plumbed, pressure-set, and verified
• Easy Start: Bypass-circuit zero-back-pressure startup — drive engages freely through belt and pulley; system builds to pressure at operating speed
• Thermal Relief Valve: Auto-open/auto-reset at 124–145°F — thermal sensing pill; hot water exits, ambient supply water replaces; no manual reset
• Serviceability: Oil sight glass and vented dipstick; accessible valve stacks, plungers, and packing assemblies
• Chemical Injector: Not included — straight 4,000 PSI water output
• Warranty: 5-year limited warranty — US-based coverage through Annovi Reverberi North America

Engine Sizing — What Drives the RRA4G40-VRT-PKG

24mm Solid Shaft. Belt Drive. Pulley Ratio Determines Speed. Size the Engine Correctly at 4,000 PSI.

• Harbor Freight Predator 459cc / 15.8 HP Max Performance — the preferred single-cylinder engine pairing for the RRA4G40-VRT-PKG. At 459cc, the Predator 459cc delivers the torque and displacement margin needed for sustained 4,000 PSI belt drive operation. Direct replacement for Honda GX390, Briggs & Stratton XR2100, and Kohler CH440. Compatible via belt drive pulley arrangement.
• Harbor Freight Predator 420cc / 13 HP — compatible with the RRA4G40-VRT-PKG via belt drive pulley. Confirm HP is appropriate for your intended duty cycle at 4,000 PSI. The 459cc Max Performance is the preferred pairing for sustained continuous-duty operation at this pressure rating.
• Harbor Freight Predator 670cc / 22 HP V-Twin — for sustained 4,000 PSI continuous-duty applications requiring maximum engine overhead. Replaces Honda GX630/660/690 and Briggs & Stratton Vanguard at significant cost savings.
• Honda GX390 — 1″ SAE J609a keyway shaft. Compatible via belt drive coupling with the RRA4G40-VRT-PKG 24mm solid shaft through pulley and belt arrangement.
• Briggs & Stratton XR2100 / Vanguard series — compatible via belt drive. Direct-mount via pulley arrangement.
• Kohler CH440 / Command series — compatible via belt drive.
• Compatible diesel engines — any diesel engine with sufficient displacement and HP for 4,000 PSI belt drive operation is compatible through appropriate pulley and belt arrangement.

24mm Solid Shaft — Belt Drive Advantage at 4,000 PSI

Speed Control via Pulley Ratio. Cooler Operation. Optimized Drive Configuration.

• Pulley ratio speed control at 4,000 PSI — the RRA4G40-VRT-PKG’s belt drive configuration allows builders to run the pump at its optimal operating speed while the engine works in its peak torque band. At 4,000 PSI, managing pump speed precisely through pulley ratio extends plunger and packing service life more effectively than fixed direct-drive configurations.
• Oversized bearings for belt side-loads — the RRA4G40-VRT-PKG’s oversized crankshaft bearings are specified to handle the belt side-loads at 4,000 PSI continuous-duty operation. Belt tension at this output level is significant — the bearing specification accounts for it in the RRA4G40-VRT-PKG’s design.
• Flexible drive platform — gas engine, diesel engine, or PTO — any drive source with sufficient output and a compatible belt drive pulley arrangement works with the RRA4G40-VRT-PKG 24mm solid shaft. Builders are not limited to a specific engine type.
• OEM standardization at 4,000 PSI belt drive — OEM builders designing belt drive pressure washer systems at 4,000 PSI can standardize on the RRA4G40-VRT-PKG for consistent pump performance and AR North America parts availability across every unit in the production run.

Typical Applications

Where the RRA4G40-VRT-PKG Delivers Best Results

• Contractor belt-driven trailer and skid-mounted rigs — the RRA4G40-VRT-PKG’s complete factory-plumbed VRT package and 4,000 PSI output support contractor builds where belt drive geometry, speed control, and drive flexibility are design requirements
• Fleet wash systems — trucks, buses, and transit vehicles — continuous-duty belt drive wash systems where Easy Start, auto-reset TRV, and 16,000 cleaning unit output support high-cycle daily programs with minimal operator intervention
• Agricultural barn sanitation and equipment washdown — belt drive agricultural systems where pump speed tuned through pulley ratio supports cooler extended operation across seasonal cleaning programs
• Industrial plants — conveyor wash, machinery cleaning, and heavy degreasing — stationary belt drive installations where the RRA4G40-VRT-PKG’s VRT plumbed thermal protection and standardized specification support continuous industrial cleaning programs
• Food and beverage facilities and municipal operations — belt drive cleaning programs where factory-calibrated VRT pressure management and consistent 4,000 PSI output support scheduled professional cleaning

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

Built in Italy. Belt Drive Ready. Backed for Five Years.

The RRA4G40-VRT-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, VRT 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 RRA4G40-VRT-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. 24mm Belt Drive. VRT Plumbed. Easy Start. Auto-Reset TRV. Bronze Rods. Everything in One Box.

Italian Engineering. Belt Drive Platform. Complete VRT Plumbed Package. 5-Year US Warranty.

Stop sourcing VRT plumbing components separately. The RRA4G40-VRT-PKG is the complete Annovi Reverberi belt drive VRT plumbed package for contractors, OEM builders, fleet operators, agricultural teams, and industrial system designers who need 4.0 GPM at 4,000 PSI with the drive flexibility of a 24mm solid shaft and zero installation surprises. Bronze connecting rods. Forged brass manifold. Dual redundant packing. 93% volumetric efficiency. VRT unloader factory-plumbed. Easy Start zero-back-pressure startup. Automatic thermal relief at 124–145°F. Every fitting and every bolt. Factory-tested. Pre-lubricated. Five-year US warranty. One box. Same-day install.

Volume buyers and OEM builders can reach the WSHPWR wholesale team directly at wholesale@wshpwr.com to discuss pricing across the complete Annovi Reverberi pump package lineup.