W4443VPI — Bertolini VRT Package with Chemical Injector | 4400 PSI | 4.3 GPM | Pressure Pro Plug Outlet | 1″ Hollow Shaft

The W4443VPI is the Pressure Pro-compatible, chemical-ready VRT package build of the Bertolini W4443 — WSHPWR bench tested, pre-lubricated, and shipped as a complete pressure system ready to mount. Every component — the pump, the VRT3-310A external bypass unloader, the thermal relief valve, the bypass recirculation loop, the fixed 16% chemical injector, the DETHOSE-FIL6 detergent hose, the 38FP plug outlet, and all fittings — is factory-plumbed, pressure-set, and WSHPWR bench tested before shipment. Your Pressure Pro hose connects directly. Bolt on, drop the detergent hose in your soap bucket, and operate at 4400 PSI with chemical injection from the first startup.

W4443VPI

What’s in the Box

• SAE J609-1″ Flange with 4-Bolt and Lock Washer Kit — Everything needed for seamless installation directly to your engine. Grade hardware included.
• Bertolini W4443 Triplex Ceramic Plunger Pump — WSHPWR bench tested and pre-lubricated. Bronze connecting rods, solid ceramic plungers, forged brass manifold with increased wall thickness, AISI 316 stainless valve assemblies, dual redundant V/U packing system, oversized crankshaft bearings. Ready to mount.
• VRT3-310A External Bypass Unloader — 4500 PSI Industrial Duty — Factory-plumbed and pressure-set to 4.3 GPM / 4400 PSI. Fully serviceable in the field. Independently replaceable without disassembling the pump head.
• Easy Start Feature — VRT bypass opens at startup. Pump starts against zero back pressure. Easier pulls, less starter wear, longer engine life.
• Exterior Bypass Recirculation Loop — Factory-Plumbed — Controlled water flow during trigger-off intervals. Protects the pump from pressure spikes throughout the cleaning cycle.
• Automatic Thermal Relief Valve (TRV) — Factory-Installed in Bypass Circuit — Opens automatically at 124–145°F, discharges hot water, draws in cooler supply. Closes automatically. No manual reset required.
• Fixed 16% Chemical Injector — Factory-Installed — Pre-set to fixed 16% soap-to-water ratio. Draws detergent automatically whenever the trigger is pulled. No adjustment required.
• DETHOSE-FIL6 — 6 ft Detergent Hose with Red Weighted Debris Filter — Chemical-resistant hose with integrated red weighted filter. Consistent pickup as tank empties. Captures debris before it reaches the injector.
• 38FP — 3/8″ Female Steel Plug Quick Connect (Outlet) — Installed on the pump outlet port. Mates directly with the 3/8″ socket on your existing Pressure Pro hose and gun. Durable steel body for repeated coupling cycles.
• Fittings and Mounting Hardware — Every fitting and fastener required for installation. Nothing to source separately.
• Factory Break-In Oil — Pre-filled with SynPower Gear Oil 75W-90. After break-in, replace with SAE 75W-90 — never change it again.

Performance

What’s Inside the W4443VPI Pump

• Forged Brass Manifold — Increased Wall Thickness — Engineered for higher operating temperatures and maximum rigidity.
• LowStressthread™ Valve Caps — Recessed O-ring design. Thread never contacts pressurized water. No Loctite required. Torque reduced by 40%.
• AISI 316 Stainless Steel Valve Assemblies — Mirror-finish, rapid-action check valves.
• Dual Redundant V/U Packing System — Fabric-reinforced nitrile buna front seals, Inox-compatible rear seals. Self-energizing under pressure.
• Solid Ceramic Plungers — Minimizes seal wear, maximizes volumetric efficiency.
• Bronze Connecting Rods (One-Piece) — Superior anti-friction performance, lower operating temperatures, extended service life.
• Oversized Crankshaft Bearings — Extended service life under continuous-duty conditions.
• Forged Steel Crankshaft — Extended Length — Maximum structural rigidity for solid pump-to-engine coupling.
• Die-Cast Aluminum Crankcase — Anti-corrosion alloy with diamond-tool machined plunger guide surfaces and enhanced cooling fins.
• VRT3-310A External Bypass Unloader — 4500 PSI — Field-serviceable, factory-set to 4400 PSI.
• Automatic Thermal Relief Valve — Factory-installed in bypass circuit. Activates at 124–145°F. Auto-reset.

Specifications

Applications

• Direct replacement for Pressure Pro direct-drive pressure washer pumps
• Contractor pressure washing skids and trailer systems
• Fleet and heavy equipment washing programs
• Honda GX engine direct-drive installations
• Industrial and commercial washdown systems
• Multi-shift operations requiring continuous-duty reliability

7-Year Warranty

The W4443VPI carries Bertolini’s industry-leading 7-year warranty on the pump. The VRT3-310A unloader and TRV are covered under their respective manufacturer warranties.