3PG4435P — Bertolini Ready-to-Run Pump Package | 4400 PSI | 3.7 GPM | Pressure Pro Compatible

The 3PG4435P is the Pressure Pro-compatible version of WSHPWR’s bench-tested Bertolini ready-to-run pump package. Built on the same forged brass head, bronze connecting rods, Super-U packing seals, and 4400 PSI-rated internals as the 3PG4435S, the 3PG4435P swaps the outlet quick-connect socket for a 38FP female steel plug — the industry-standard fitting used by Pressure Pro pressure washers throughout North America. If you are replacing a pump on a Pressure Pro machine, the 3PG4435P plugs directly into your existing hose and gun without adapters, without rethreading, and without downtime. Connect your water supply, mount the pump, and get back to work.

What’s in the Box

Every 3PG4435P is bench tested at WSHPWR before shipment — 90 seconds at idle, followed by 90 seconds at full rated pressure — to verify pump integrity, plumbing seal quality, and workmanship. Each unit ships with the following installed and included:

• Fully Assembled Bertolini 3PG 4035-W Pump — Complete with built-in unloader valve, fixed 16% detergent injector, and brass barb. The same 4400 PSI-rated pump exclusively available through WSHPWR.com for North America, Central America, and the Caribbean.
• SAE J609-1″ Flange with 4-Bolt and Washer Kit — Pre-attached mounting flange for seamless installation directly to your engine. All hardware included.
• Vented Dipstick — Installed prior to bench testing. Do not remove before field use. Critical for preventing crankcase vapor buildup and protecting seals during operation.
• 38FP — 3/8″ Female Steel Plug Quick Connect (Outlet) — Installed on the pump outlet port. This is the same quick-connect plug format used by Pressure Pro pressure washers, making the 3PG4435P a direct drop-in replacement. The 38FP features a durable steel body engineered for repeated coupling cycles, hose drag, and daily wash-bay abuse while maintaining a leak-resistant, smooth-flow connection.
• 5332 — Garden Hose Adapter, 3/4 GH x 3/8″ Male (Inlet) — Installed on the pump inlet port. Connects a standard 3/4″ garden hose directly to the pump’s 3/8″ female thread inlet with no additional fittings required.
• TPP140-1/4 — Brass Thermal Relief Valve, 1/4″ (Upgraded Version) — Installed on the low-pressure manifold head port. Activates automatically at 140°F when the trigger is held closed during extended bypass, discharging overheated water and drawing in cooler supply. Protects seals, plunger surfaces, and valve seats from heat damage. The 3PG4435P uses the upgraded brass body version for superior corrosion resistance over standard aluminum versions.
• DETHOSE-FIL6 — 6 ft Detergent Hose with Red Weighted Debris Filter — Included for chemical feed setup. Six feet of chemical-resistant thermoplastic hose with an integrated red weighted filter that sinks to the bottom of the detergent container for consistent chemical pickup. Captures debris and sediment before it reaches the injector.

Direct Replacement for Pressure Pro Pressure Washers

The “P” in 3PG4435P stands for Plug — and the plug matters. Pressure Pro machines use a 3/8″ female quick-connect plug on the pump outlet as their standard hose interface. Most replacement pumps on the market ship with a socket, which means your existing Pressure Pro hose and gun require an adapter before you can run. The 3PG4435P eliminates that problem entirely. The 38FP female steel plug is installed at WSHPWR, bench tested under pressure, and ships ready to mate directly with the 3/8″ socket on your existing Pressure Pro hose — the same connection you pull off the old pump goes straight onto the new one.

Beyond the fitting compatibility, the 3PG4435P is a significant performance upgrade over the OEM pumps found on most Pressure Pro machines. The forged brass head, bronze connecting rods, Super-U packing seals, and LowStressthread™ valve caps represent a higher specification than what ships on most production pressure washers at any price point. You are not just replacing the pump — you are upgrading it.

Bench Tested Before It Ships

Every 3PG4435P undergoes a documented bench test at WSHPWR prior to packaging — 90 seconds at idle power followed by 90 seconds at full rated pressure. This confirms pump performance integrity, verifies that all installed plumbing is leak-free, and validates workmanship quality before shipment. When the 3PG4435P arrives, it has already run.

The Forged Brass Head — Why It Matters

Bertolini starts with a solid billet of high-grade brass and subjects it to a precision hot-forging process. Forging aligns the grain structure of the metal — producing a head with higher tensile strength, better fatigue resistance, and zero porosity compared to cast alternatives. Once forged, the 3PG4435P head is CNC-machined in Bertolini’s Reggio Emilia facility using fully automated, custom-engineered tooling with inspection and verification at every stage. Every port, valve seat, and thread is cut to exact tolerances. The result is a head that seals perfectly under extreme cyclical loads without Loctite on the valve caps.

Performance at Every Speed

The 3PG4435P delivers 4400 PSI across all three operating speeds. Match engine RPM to your flow requirement.

What’s Inside the 3PG4435P

• Forged Brass Head — 8-bolt crankcase attachment. Maximum rigidity under extreme pressure and overpressure events.
• LowStressthread™ Valve Caps — Recessed O-ring design. Thread never contacts pressurized water. No Loctite required. Torque reduced by 40%.
• AISI 316 Stainless Check Valves — Mirror-finish, rapid-action for corrosion resistance and maximum fluid dynamic efficiency.
• Super-U Packing Seals — Double-U self-lubricating composite seals prevent crankcase oil contamination.
• Tungsten Carbide-Coated Plunger Rods — Maximum wear resistance and volumetric efficiency.
• Bronze Connecting Rods (One-Piece) — Superior anti-friction performance and extended service life vs aluminum rods.
• Oversized Premium Bearings — Extended life even under heavy continuous-duty conditions.
• Die-Cast Aluminum Crankcase — Anti-corrosion alloy with diamond-tool machined plunger guide surfaces and enhanced cooling fins.
• Anti-LeakSystem™ — Head-to-crankcase dust exclusion system extends packing seal life in outdoor environments.

Specifications

Applications

• Direct replacement for Pressure Pro pressure washer pumps
• Professional pressure washing and contract surface cleaning
• Fleet and heavy equipment washing
• Self-service car wash bay systems
• Pre-painting and surface preparation
• Tank and vessel cleaning
• Mobile wash rigs requiring a ready-to-run pump package

3PG4435P — Pressure Pro Direct Replacement with 400 PSI Upgrade

The 3PG4435P replaces the pump on Pressure Pro pressure washers using the standard 3/8″ quick-connect plug interface — the 38FP female steel plug installed on the outlet mates directly with your existing Pressure Pro hose and gun without adapters. At $379 delivered, it costs less than most OEM Pressure Pro replacements and delivers 4400 PSI — significantly above the 3500–4000 PSI rating of the pumps that shipped on most Pressure Pro machines.

3PG4435P vs Pressure Pro OEM Pump

Same Connection. More Pressure. Better Warranty. Lower Price.

Pull the failed pump off your Pressure Pro machine. Mount the 3PG4435P on the same flange with the included 4-bolt and lock washer kit. Connect your existing hose to the 38FP plug outlet. Connect your water supply to the garden hose adapter inlet. Start your engine. The 3PG4435P has already been bench tested at 4400 PSI before it shipped. Your machine is not just repaired — it is upgraded.

7-Year Warranty

The 3PG4435P carries Bertolini’s industry-leading 7-year warranty on the pump, backed by over 100 years of Italian engineering. WSHPWR.com-installed accessories are verified through the pre-shipment bench test. When you mount the 3PG4435P for the first time, it has already proven itself.