3PG4440S — Bertolini Ready-to-Run Pump Package | 4400 PSI | 4.2 GPM | Socket QC Outlet

The 3PG4440S is the highest-flow model in WSHPWR’s bench-tested Bertolini ready-to-run pump package lineup. Built on the same forged brass head, bronze connecting rods, Super-U packing seals, and 4400 PSI-rated internals as the standard 3PG4440W, the 3PG4440S arrives pre-fitted with a professional accessory package — installed, tested, and ready for work the moment it leaves the box. At 4.2 GPM at 3450 RPM, the 3PG4440S is the highest-output configuration in the 3PG series and the preferred choice for contractors running larger surface cleaners, high-volume fleet washing, or any application where maximum flow is the priority.

What’s in the Box

Every 3PG4440S 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 4040-W Pump — Complete with built-in unloader valve, fixed 16% detergent injector, and brass barb. The highest-flow 3PG model, rated at 4400 PSI and 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.
• AL-QC3/8B — 3/8″ F x 3/8″ F Brass Quick-Connect Coupler (Outlet) — Installed on the pump outlet port. Precision-machined solid brass construction. Tool-free connect and disconnect for fast hose and gun changes. Smooth internal bore maintains full system pressure with no flow restriction.
• 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 3PG4440S 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 even as the tank empties. Captures debris and sediment before it reaches the injector.

Bench Tested Before It Ships

Every 3PG4440S 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 3PG4440S 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 3PG4440S 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 — no Loctite required on the valve caps.

Performance at Every Speed

The 3PG4440S is the highest-flow model in the 3PG series. All three operating speeds deliver 4400 PSI — match engine RPM to your flow requirement.

What’s Inside the 3PG4440S

• 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

• High-volume professional pressure washing and contract surface cleaning
• Large surface cleaner operation requiring maximum GPM
• 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 high-flow pump package

3PG4440S vs Simpson AAA 11.6GA13 — An Honest Comparison

If you searched “4400 PSI Simpson pump” and landed here, you are likely looking at the AAA 11.6GA13 C-45 Series pump kit — currently selling for $389.99 on Amazon and available at Home Depot and Lowe’s. We are not going to tell you the AAA is a bad pump. For a homeowner who pressure washes a driveway twice a year, it is adequate. What we are going to tell you is that for contractor-grade, continuous-duty applications, the 3PG4440S is a fundamentally different class of pump — and it costs less.

Side by Side

The Plunger Difference — Why It Matters for Contractors

The AAA 11.6GA13 uses ceramic-coated steel plungers. The 3PG4440S uses 100% solid ceramic plungers. This is not a minor distinction — it is the difference between a component that is adequate for intermittent residential use and one that is engineered for continuous contractor duty.

A ceramic-coated plunger is a steel rod with a ceramic layer applied to the surface. That coating improves wear resistance compared to bare metal — but it has a critical failure mode that makes it unsuitable for contractor applications: when the coating delaminates under sustained thermal and mechanical load, the steel substrate contacts the pump packings directly. The result is accelerated seal wear, oil contamination in the crankcase, and a chain failure that takes out multiple components simultaneously. The world’s most recognized professional pump manufacturers — including the Italian industrial pump industry that Bertolini is part of — use solid ceramic exclusively for continuous-duty applications for exactly this reason.

A solid ceramic plunger is made entirely from sintered alumina ceramic — the same material used in industrial chemical pumps, high-pressure cutting systems, and continuous-duty industrial washdown equipment. It has no coating to delaminate. The surface maintains its finish and dimensional accuracy across thousands of operating hours. Seal life is significantly extended because the plunger surface never degrades. Under dry-start conditions — which happen on every job site — a solid ceramic plunger resists galling and scoring that immediately damages a coated plunger’s surface.

For a contractor running this pump on a trailer rig, fleet washing system, or multi-shift operation, solid ceramic is not a premium option. It is the minimum acceptable specification.

The Head Difference — Forged Brass vs Cast Brass

Both the AAA 11.6GA13 and the 3PG4440S use brass heads. The difference is how that brass was formed — and in high-pressure pump engineering, that difference is significant.

The AAA 11.6GA13 head is cast brass. In casting, molten brass is poured into a mold and allowed to cool. The cooling process introduces microscopic voids and porosity throughout the material — irregularities in the grain structure that are invisible to the naked eye but measurable under load. If you look closely at the AAA head, you can see the surface texture characteristic of cast brass — slightly rough, with a granular appearance that reflects the casting process. Under sustained cyclical pressure load, those voids become stress concentration points and eventual failure sites.

The 3PG4440S head is made of forged brass, which is created by reshaping a solid brass billet under extreme mechanical force without melting, resulting in enhanced tensile strength, superior fatigue resistance, and zero porosity. This dense and uniform construction allows forged heads to outperform cast heads in fatigue life, making them ideal for professional pump applications that demand high performance under continuous cycling. Bertolini adopted this hot-forged architecture to ensure better durability and reliability in demanding operational conditions.

The Price Difference — You Pay Less and Get More

At $399 delivered to your door anywhere in the 48 states, the 3PG4440S costs $14.99 less than the AAA 11.6GA13 on Amazon — before you factor in shipping on the AAA. You get 0.2 more GPM, a forged brass head instead of die-cast aluminum, solid ceramic plungers instead of ceramic-coated steel, bronze connecting rods, a 7-year warranty instead of 5, lifetime oil after break-in, and a pump that was bench tested at full pressure before it was packed in the box. The AAA was not.

The 3PG4440S is exclusively available through WSHPWR.com for customers in North America, Central America, and the Caribbean. It is not sold at big-box retailers. It is not available through general distribution. When you buy it here, you are buying it from the people who configured it, tested it, and stand behind it with a 7-year warranty and same-day shipping.

7-Year Warranty

The 3PG4440S 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 3PG4440S for the first time, it has already proven itself.