W4443VP — Bertolini VRT Package | 4400 PSI | 4.3 GPM | Pressure Pro Plug Outlet | 1″ Hollow Shaft

The W4443VP is the Pressure Pro-compatible VRT package build of the Bertolini W4443 — a professional-grade triplex ceramic plunger pump 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, and all fittings — is factory-plumbed, pressure-set, and WSHPWR bench tested before shipment. The W4443VP adds a 38FP female steel plug outlet — the industry-standard quick-connect format used by Pressure Pro pressure washers — making it a direct drop-in replacement with an industrial-grade external VRT unloader that no OEM Pressure Pro configuration includes.

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. Rated to 4500 PSI.
• 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.
• 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 and heavy wash-bay use.
• 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.

Direct Replacement for Pressure Pro — With an Upgrade

The 38FP female steel plug mates directly with the 3/8″ socket on your existing Pressure Pro hose and gun. No adapters. No rethreading. Your Pressure Pro hose pulls off the old pump and goes straight onto the W4443VP.

The upgrade is the VRT3-310A external bypass unloader. Standard Pressure Pro machines ship with built-in unloader valves — functional but not field-serviceable without disassembling the pump head. The W4443VP replaces that with a fully external, independently replaceable VRT unloader rated to 4500 PSI. Pressure set at the factory. Field-adjustable without tools. Serviceable without touching the pump.

Performance

What’s Inside the W4443VP 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 W4443VP carries Bertolini’s industry-leading 7-year warranty on the pump. The VRT3-310A unloader and TRV are covered under their respective manufacturer warranties.