RKV4037F24VR35I | 3400 RPM High-Pressure Triplex Pump

RKV4037F24VR35I | 4 GPM 3700 PSI Gas Engine Pump with VR35 Unloader and Injector, 1 in. Hollow Shaft

The RKV4037F24VR35I is an Annovi Reverberi RK triplex plunger pump rated 4.0 GPM at 3,700 PSI at 3400 RPM, with a VR35 unloader and chemical injector already installed. It slides onto a 1 in. engine shaft, bolts to the engine face, and is ready to plumb: no belts, no separate unloader to buy, no injector to add.

The VR35 has an external bypass port that sends bypass water out of the pump instead of recirculating it inside, which keeps the pump cooler when the trigger is closed. At 4 GPM and 3,700 PSI, this is a full contractor rating for concrete, fleets, equipment and degreasing, and the crankshaft-driven triplex with ceramic plungers rebuilds with a kit when the seals finally wear.

What’s in the Box

• RKV4037F24VR35I pump with F24 engine flange
• VR35 unloader with chemical injector, installed
• Crankcase oil, pre-filled at the factory
• Vented dipstick. The pump ships with a shipping plug in the oil port. Swap in the dipstick before the first start.
• Engine mounting bolts and lock washers
• Operation manual and parts schematic
• 5-year Annovi Reverberi warranty

The shaft key is not included. It comes with your engine, and its size is set by the engine maker.

Will It Fit My Machine?

• Shaft: your engine has a 1 in. keyed horizontal shaft.
• Mount: the engine face matches the F24 flange bolt pattern.
• Engine size: 389cc to 420cc (13 HP class and up).
• Bypass line: run the VR35 bypass port back to the tank or pump inlet.
• Detergent: the injector draws chemical at low pressure. Use a low-pressure soap nozzle to pull detergent.

Not sure? Text a pump specialist at (505) 226-6061 with a photo of your engine tag and we’ll confirm the fit.

What Else You’ll Need

• Thermal relief valves and inlet filters: the thermal valve protects the pump during long bypass periods, and the filter keeps debris out of the valves.

RKV4037F24VR35I Specifications

• Model: RKV4037F24VR35I
• Flow: 4.0 GPM
• Max Pressure: 3,700 PSI
• Speed: 3400 RPM (engine speed)
• Gas Engine Size: 389cc to 420cc
• Shaft: 1 in. hollow
• Mount: F24 engine flange
• Unloader: AR VR35 with chemical injector, installed, external bypass
• Plungers: Ceramic
• Max Water Temperature: 140°F
• Weight: 21 lbs
• Warranty: 5 years
• Brand: Annovi Reverberi

Shipping: Usually ships via UPS in 1 to 3 days.