SRMW22G26-ST-AN-SX 2.2 GPM 2600 PSI | LH anodized vertical EZ pump

SRMW22G26-ST-AN-SX Heavy-Duty Vertical Axial Cam Pump

The Annovi Reverberi SRMW22G26-ST-AN-SX is a reinforced vertical-drive axial cam pump
built for gas-engine pressure washers that need dependable output and enhanced
corrosion resistance. Delivering 2.2 GPM at 2,600 PSI at a nominal
3,400 RPM, it provides stable cleaning performance for residential,
agricultural, and light commercial platforms that see regular service in harsh,
outdoor environments.

• 2.2 GPM at 2,600 PSI for solid, everyday cleaning performance.
• Vertical axial cam design optimized for compact gas-engine machines.
• Reinforced SRMW architecture for improved durability over standard consumer pumps.
• Configured for left-hand 7/8″ vertical engine shafts with F7-style interface.
• Designed to balance performance, service life, and low-maintenance operation.

Performance & Duty Point

The SRMW22G26-ST-AN-SX is sized for portable pressure washers that must deliver
reliable pressure without oversizing the engine or frame. Its 2.2 GPM duty point
supports common residential and light commercial cleaning tasks, while the
2,600 PSI rating provides strong jet energy for concrete, siding, equipment,
and vehicle washing.

• Flow: 2.2 GPM for controlled water usage and effective coverage.
• Pressure: 2,600 PSI for removal of typical dirt, mildew, and road film.
• Speed: 3,400 RPM matched to standard small gas engines.
• Steady performance for intermittent and moderate continuous-duty cycles.
• Suitable for hose and gun sets commonly used on consumer and farm units.

Corrosion-Resistant Construction

This SRMW variant is specified with corrosion-resistant details that protect
critical components from rust and premature wear. The anodized left-hand
7/8″ shaft provides a robust interface to the engine while resisting
oxidation, and the stainless-steel inlet and outlet tubes help
protect the plumbing circuit from corrosion-related failures.

• Anodized vertical shaft for improved corrosion resistance at the engine interface.
• Stainless-steel water tubes for robust inlet and outlet connections.
• Reinforced SRMW body designed for outdoor, moisture-rich environments.
• Materials selected to handle regular exposure to water, detergents, and weather.
• Enhanced hardware and finishes aimed at extending pump service life.

SRMW22G26-ST-AN-SX

Wet-End Materials & Flow Path

Internally, the wet-end layout is optimized to maintain consistent flow and
pressure with minimal restriction. Hardened and corrosion-resistant components
help preserve sealing surfaces and passage geometry over time, which is critical
for maintaining pressure in compact axial pumps.

• Engineered flow passages to support stable pressure at 2.2 GPM.
• Internal geometry designed to limit turbulence and pressure loss.
• Component selection targeted at low maintenance in typical duty environments.
• Serviceable design that supports restoration with OEM parts when hours accumulate.

Integrated Protection & Controls

The SRMW22G26-ST-AN-SX incorporates key protection and control functions directly
into the pump body. This reduces external plumbing, simplifies assembly, and
improves protection against overheating and overpressure conditions common in
small pressure washer systems.

• Integrated unloader for automatic bypass when the trigger gun is closed.
• Manual pressure adjustment knob for matching output to specific tasks.
• Built-in chemical injection circuit for on-demand detergent application.
• Factory-installed thermal relief valve (TRV) to protect against heat buildup.
• Internal passages designed to support reliable bypass and pressure regulation.

Unloader, TRV & Chemical Injection

The built-in unloader and TRV combination ensures that the pump and engine are
protected during idle and bypass conditions, while the chemical injector
supports detergent-assisted cleaning when needed. These functions are integrated
to keep the overall system compact and easier to plumb.

• Unloader automatically routes water to bypass when flow is stopped at the gun.
• Adjustable pressure control for dialing in softer or more aggressive settings.
• Thermal relief valve vents overheated water during extended bypass periods.
• Detergent injector allows soap application without separate proportioning gear.
• Reduced hose and fitting count compared to separate external components.

Mounting, Integration & Compatibility

The pump is configured for 7/8″ left-hand vertical shafts,
making it a direct solution for specific gas-engine platforms that require
this orientation. This left-hand configuration is important where frame design
or accessory placement dictates a particular rotation and shaft arrangement.

• 7/8″ left-hand vertical shaft for specific engine families and frames.
• Vertical layout suited to compact cart and wheel-barrow style pressure washers.
• Direct-drive configuration eliminates belts, pulleys, and additional guards.
• Mounting pattern designed to align with common residential and farm units.
• Appropriate for OEM builds or targeted replacement of existing SRMW-style pumps.

Maintenance, Serviceability & Lifecycle

The SRMW22G26-ST-AN-SX is designed for low day-to-day maintenance while still
offering a path to rebuild when operating hours justify the investment. The
maintenance-free synthetic oil crankcase removes routine oil changes from the
service schedule, while the wet end remains serviceable with appropriate kits.

• Factory-filled synthetic oil crankcase—no scheduled oil change required.
• Reduced maintenance burden for homeowners, farms, and small shops.
• Serviceable seals and valves to restore performance as the pump ages.
• Manuals and parts diagrams provided to support future overhaul work.
• Lifecycle oriented toward long-term use with planned rebuild rather than frequent replacement.

Applications & Use Cases

With its reinforced construction and corrosion-resistant features, this SRMW22G26-ST-AN-SX pump is
suitable for a wide range of residential and light-duty industrial cleaning tasks.
It is particularly well suited to equipment that works in wet, dirty, or corrosive
environments where standard consumer pumps may fail prematurely.

• Residential cleaning of siding, decks, patios, driveways, and fences.
• Light commercial storefronts, sidewalks, and small maintenance bays.
• Vehicle and small fleet washing for cars, motorcycles, ATVs, and trailers.
• Agricultural cleaning of tractors, implements, tools, and farm structures.
• Specialty applications requiring a 7/8″ left-hand vertical shaft interface.

Why Specify the SRMW22G26-ST-AN-SX

The SRMW22G26-ST-AN-SX delivers a practical mix of reinforced construction,
corrosion-resistant components, integrated protection, and low-maintenance
operation in a compact form factor. For equipment builders, dealers, and
end-users, it offers a clearly defined specification and a durable platform
for machines that must perform reliably across many cleaning seasons.

• Heavy-duty SRMW design with anodized shaft and stainless tubing for added durability.
• Integrated unloader, chemical injector, and TRV to protect the system and simplify plumbing.
• Maintenance-free crankcase that reduces service demands for the owner.
• Vertical left-hand architecture targeted at specific engine and frame combinations.
• Dependable base for WSHPWR.com customers who need a corrosion-resistant, vertical-drive axial pump.