W4443DLX 4400 PSI Pump GX390 Clear View Inlet

W4443DLX | Bertolini 4400 PSI 4.3 GPM Deluxe Pump with VRT Double-Loop Bypass and Clear View Filter

W4443DLX is the deluxe build of the W4443, rated 4.3 GPM at 4,400 PSI at 3450 RPM, with an external VRT3-310A unloader on a double-loop external bypass and a clear view brass inlet filter. The W4443DLX double loop gives the bypass water more distance to shed heat, for cooler running and smoother bypass when the trigger is closed. WSHPWR bench tests every unit and pre-sets the unloader before it ships.

Why 4,400 PSI, and why only here: Bertolini’s standard WMG is rated 4,000 PSI. The W4443DLX is built with stronger side bearings and upgraded bronze connecting rods, and Bertolini has granted it a 4,400 PSI rating exclusive to WSHPWR.com. It is made in Reggio Emilia, Italy, where Bertolini has built pumps since 1918.

What the Deluxe Upgrades Do

On the W4443DLX, the VRT3-310A is rated to 4,500 PSI, a safety margin above the pump’s 4,400 PSI, and it is fully serviceable in the field without opening the pump head. Easy Start opens the bypass at startup, so the engine pulls over against zero back pressure. The clear view inlet filter is machined from heavy-duty brass, with a stainless steel micron screen inside a transparent body, so you can check water clarity and screen condition at a glance without removing a fitting. It is rated to 8 GPM and 180°F, has dual 1/4 in. side ports for bypass return, and rinses clean in under a minute with no tools.

Which W4443 Do You Need?

Every cold water version is rated 4,400 PSI. Choose the one built for your machine:

• Bare pump: no unloader. For shops that reuse their own unloader and plumbing.
• W, WS and WP versions: built-in unloader and injector, with standard, quick connect socket or quick connect plug outlet.
• VRT, VP and VPI versions: plumbed with an external VRT unloader, a quick connect plug outlet on the VP and VPI, and an injector on the VPI.
• DLX and VPDLX versions (DLX is this page): deluxe builds with a double-loop external bypass and a clear view inlet filter.
• T, WT, WST, WPT, VRTT and PIT versions: tank and gravity feed versions with the King full-flow inlet adapter.
• H, WH, HT and WHT versions: hot water versions with 167°F seals, rated 4,060 PSI.

What’s in the Box

• W4443DLX pump, WSHPWR bench tested
• VRT3-310A external unloader, factory plumbed and pressure set
• Double-loop external bypass, factory plumbed
• Clear view dual-port brass inlet filter with stainless micron screen
• All fittings for installation
• SAE J609 1 in. flange mounting bolts and lock washers
• Crankcase filled with Bertolini’s SynPower 75W-90 break-in oil
• Vented dipstick. Install it before the first start. Never run the pump without it.
• 7-year Bertolini warranty

Will It Fit My Machine?

It is a direct replacement for the pump on:

• Simpson SuperPro Roll-Cage SRC4440112
• BE Power Equipment B4415PCS
• Pressure-Pro E4040HA, E4042HV and SLPVV4G42-400
• Machines running Annovi Reverberi RKV4G36, RKV4G40 or RRV4G40 pumps

It fits any direct-drive pressure washer with a 1 in. horizontal engine shaft and SAE J609 mounting face, on a 389cc to 420cc engine (GX390 class).

Not sure the W4443DLX fits? Text a pump specialist at (505) 226-6061 with a photo of your machine’s tag and we’ll confirm.

What Makes a Bertolini Different

• LowStressthread valve caps: the O-ring seals ahead of the thread, so pressure water never reaches it. The caps don’t loosen, need 40% less torque and put 60% less stress on the head.
• Lifetime oil: change the break-in oil once at 50 to 100 hours to standard 75W-90 gear oil, and that fill lasts the life of the pump.
• Built heavy: thick forged brass head, AISI 316 stainless check valves, solid ceramic plungers on nitrided stainless plunger rods, one-piece bronze connecting rods, oversized bearings and an extended forged steel crankshaft.

Common Questions

• Why a double-loop bypass? The longer loop cools the bypass water before it returns, so the W4443DLX runs cooler during long trigger-off periods.
• How often should I clean the filter? Check it at a glance every day. When the screen looks dirty, rinse it, which takes under a minute.
• Can it run hot water? The W4443DLX is rated to 140°F. For hotter water, choose an H version.

W4443DLX Specifications

• Model: W4443DLX (Bertolini WMG series)
• Flow: 4.3 GPM at 3450 RPM
• Max Pressure: 4,400 PSI (WSHPWR exclusive rating)
• Unloader: VRT3-310A external, rated 4,500 PSI
• Bypass: Double-loop external
• Inlet Filter: Clear view brass, 8 GPM, 180°F
• Start Assist: Easy Start
• Shaft: 1 in. hollow
• Mount: SAE J609 1 in.
• Engine: 389cc to 420cc, GX390 class
• Plungers: Solid ceramic, 15 mm
• Connecting Rods: Bronze, one-piece
• Check Valves: AISI 316 stainless steel
• Oil: 0.6 L SAE 75W-90
• Max Water Temperature: 140°F
• Weight: 20 lbs
• Warranty: 7 years
• Brand: Bertolini, made in Italy

Shipping: Ships the same day when ordered by 3 PM EST on business days. Need it faster? Text (505) 226-6061 for expedited air freight options.