W4443T 4400 PSI Tank Feed Pump GX390 Trailer Skid

W4443T | Bertolini 4400 PSI 4.3 GPM Tank Feed Pump with King Full-Flow Inlet, GX390

W4443T is the bare W4443 pump fitted with the King tank-feed inlet adapter, rated 4.3 GPM at 4,400 PSI at 3450 RPM. Built for trailers, skids and any machine fed from a tank, the King adapter takes a 1-1/4 in. hose straight to the pump with full flow and minimal restriction, so the pump head gets all the water it can use.

Why 4,400 PSI, and why only here: Bertolini’s standard WMG is rated 4,000 PSI. The W4443T 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.

Why the King Tank-Feed Adapter

A tank-fed pump has no supply pressure behind it, so every restriction in the inlet steals flow and risks cavitation. The W4443T adapter is a 1/2 in. male NPT by 1-1/4 in. plated steel hose barb with a smooth tapered bore. Connect a 1-1/4 in. non-collapsible hose and the pump draws freely, with no adapters in the line. The barb grips the hose against slipping and leaks under suction.

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: deluxe builds with a double-loop external bypass and a clear view inlet filter.
• T, WT, WST, WPT, VRTT and PIT versions (T is this page): 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

• W4443T pump, fully assembled, no unloader
• King tank-feed inlet adapter, 1/2 in. M NPT by 1-1/4 in. hose barb, installed
• 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 W4443T 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

• Does it include an unloader? No. The W4443T is the bare pump with the tank-feed inlet. Add your own unloader rated for 4,400 PSI and 4.3 GPM.
• What hose should I use? A 1-1/4 in. non-collapsible inlet hose. A soft hose can collapse under suction and starve the pump.
• Can it run hot water? The W4443T is rated to 140°F. For hot water from a tank, see the HT version.

W4443T Specifications

• Model: W4443T (Bertolini WMG series)
• Flow: 4.3 GPM at 3450 RPM
• Max Pressure: 4,400 PSI (WSHPWR exclusive rating)
• Unloader: None
• Inlet: King tank-feed adapter, 1-1/4 in. hose barb
• Outlet: 3/8 in. BSP
• 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: 17 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.