2.5GPM-2800PSI-3400RPM-7/8 Inch Hollow Shaft-RMW Vertical

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SKU : TS-RMW25G28-PKG

Quick Specs
PSI: 2800
GPM: 2.5

Regular Price: $159.00

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Specifications

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Description

Special One-Time Offer – Trade Show Inventory

Take advantage of this unique opportunity to own brand-new, unused equipment at a discounted price. Each unit was displayed as a tabletop demonstration at select trade shows and is available in a single quantity only—once it’s sold, it’s gone. Prices include delivery to the 48 contiguous states, and every product comes backed by a full manufacturer’s warranty, ensuring you receive the same protection as a standard new purchase. Requires $250 purchase to qualify for delivery included.

Bring a tired residential pressure washer back to full output with this OEM Annovi Reverberi RMW-series vertical plunger pump. Tuned for small gas engines, it delivers 2.5 GPM at 2,800 PSI up to 3,400 RPM, restoring the bite you expect for concrete, siding, fencing, and vehicle washdowns. The keyed 7/8″ hollow shaft slides directly onto most 5–5.5 HP vertical engines using the common 4-bolt pattern, so you can swap it in quickly without fabricating brackets or spacers.

This is a true triplex plunger pump, not a wobble-plate unit. That means better volumetric efficiency, steadier pressure, and longer service intervals when you keep inlet supply and filtration in spec. A 3/4″ garden-hose inlet makes hookup simple on consumer carts and wall spigots, while the M22 × 14 mm outlet matches standard residential hoses and guns (use an M22-to-3/8″ QC adapter if you prefer quick-connects). AR ships the crankcase pre-filled with 2.2 oz of pump oil, and the included thermal relief valve and chemical injector arrive already installed to reduce setup time.

Protection is built in. The thermal relief valve bleeds overheating water during bypass periods—like when the trigger is off but the engine’s still running—protecting seals and plungers from heat soak. The downstream chemical injector lets you draw detergent when you switch to a low-pressure nozzle; toggle back to a high-pressure tip for full cleaning power. With a maximum fluid temperature of 140°F, it’s designed for cold-water and light warm-water use without risking seal damage.

Installation is straightforward: confirm your engine has a 7/8″ vertical shaft, align the key, slide the pump on, and secure with the included (4) bolts and (4) lock washers. Check the owner’s manual for bolt torque and inlet supply requirements (always avoid running the pump dry). After mounting, prime the inlet, verify there are no air leaks, and confirm the injector draws soap properly at low pressure.

Whether you’re replacing a worn factory pump or upgrading from a wobble-plate unit, AR’s OEM RMW design is a proven, cost-effective way to extend the life of your pressure washer without buying a new machine. You’ll get crisp pressure, smoother trigger response, and compatibility with common residential accessories—so jobs go faster and results look better.

What’s Included

(1) AR RMW vertical triplex pump (2.5 GPM @ 2,800 PSI, 3,400 RPM max)
(1) Thermal relief valve (installed)
(1) Chemical injector (installed)

Key Features & Specs

Performance: 2.5 GPM, 2,800 PSI; up to 3,400 RPM
Engine Mount: Vertical, 7/8″ keyed hollow shaft, 4-bolt pattern; fits most 5–5.5 HP vertical gas engines
Connections: 3/4″ GHT (garden-hose) inlet; M22 × 14 mm outlet
Temperature: Max fluid 140°F (cold-water / light warm-water)
Protection: Thermal relief valve prevents heat damage in bypass
Detergent: Downstream chemical injector for soap application
Oil: 2.2 oz pre-filled crankcase (service per AR schedule)

Compatibility Notes

Designed for vertical-shaft engines only; not compatible with horizontal engines.
Verify shaft diameter (7/8″), key size, bolt pattern, and crankshaft length before ordering.
Match pump ratings to your washer’s frame, hose, gun, and nozzle selection; do not exceed 2,800 PSI.
Use a clean, unrestricted water supply; avoid running dry or with inlet leaks (which cause cavitation).

Upgrade your residential washer the smart way: with a factory-engineered AR RMW pump that bolts up cleanly, protects itself in real-world use, and restores the washing power that makes weekend projects and routine maintenance faster and easier.

Specifications

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2.5GPM-2800PSI-3400RPM-7/8 Inch Hollow Shaft-RMW Vertical

SKU: TS-RMW25G28-PKG

PSI: 2800

GPM: 2.5

RPM: 3400