Westinghouse ePX2000 Fitting Size & Compatibility Guide
Standard M22-14mm fitting.
What Are You Trying to Connect?
Direct compatibility rules and recommended hardware for standard pressure washing upgrades.
Standard 50ft Hose
Standard universal M22-14mm hoses (like UberFlex) screw directly onto your machine pump with zero adapters needed.
Foam Cannon Suction
1.1mm Orifice Jet
Snubby Detailing Gun
Aftermarket snubby guns with M22-14mm female inlets screw directly onto your stock or aftermarket hose.
Surface Cleaner Deck
Maximum recommended deck diameter: 8" to 10" Deck based on the 4-inches-per-GPM rule.
Engineering Specifications & True Working Pressure
Side-by-side analysis of manufacturer advertised marketing ratings vs. real-world dynamic flow physics.
| Specification Parameter | Advertised Factory Rating | True Dynamic Working Spec | Engineering Verification Details |
|---|---|---|---|
| Discharge Pressure | 2050 PSI | 1200 PSI | Advertised is static zero-flow peak; working spec is stabilized nozzle pressure. |
| Water Flow Rate | 1.5 GPM | 1.15 GPM | Measured at continuous operating load under standard atmospheric conditions. |
| Water Horsepower (WHP) | — | 0.81 WHP | Calculated via hydraulic equation: WHP = (PSI × GPM) / 1,714 |
| Motor / Engine Source | 13-Amp Electric Motor (Axial Cam Pump) | 120V / 13A AC, 60 Hz | |
| Pump Outlet Thread | M22-14mm Male | Inner stem caliper pin: 14.0mm | |
| Pump Water Inlet | 3/4" GHT Garden Hose Swivel | Standard North American garden hose thread with mesh intake filter. | |
| Stock Hose Dimensions | 15 ft (1/4" ID) | Hose Ends: M22-14mm Female | |
| Spray Wand Outlet | 1/4" Quick-Connect | Standard quick-connect accepts universal spray tips and accessories. | |
Mechanical Engineering Verdict on Power & Performance
Westinghouse slaps a bold '2,050 PSI' badge on the shroud, but that's pure marketing fiction from a split-second deadhead spike. Out on the driveway with a standard nozzle, the 13-amp universal motor settles into 1,200 working PSI at 1.15 GPM. That delivers an honest 0.81 Water HP via (1,200 × 1.15) / 1,714, safely under standard 15-amp, 120-volt household breaker limits.
Technical Fitting Schematic: M22-14mm Male
Mechanical cross-section detailing the stem pin caliper diameter, Viton O-ring compression channel, and thread pitch.
Engineer's Plug-and-Play Upgrade Bill of Materials (BOM)
Field-tested, zero-leak hardware parts specifically matched to the Westinghouse ePX2000.
UberFlex 50ft 1/4" Hose
Replaces ultra-short 15ft stock hose with professional 50ft line.
1.1mm Foam Orifice Jet
Produces thick foam with low-GPM electric pressure.
Field Diagnostics & Real-World Troubleshooting: Westinghouse ePX2000
Mechanical failure analysis and shop teardown solutions for common operating issues.
Shop Diagnostics & Service Notes
Pulling apart an ePX2000 on the workbench reveals a 13-amp series-wound universal motor hooked to a tiny aluminum wobble-plate pump. The heart of most customer complaints is the Total Stop System (TSS). Inside the plastic electrical box sits a spring-loaded bypass shuttle piston resting against an electrical microswitch. Let go of the trigger, and line backpressure shoves this piston out to open the contacts and cut motor power. Road grime, hard-water mineral crust, or dried factory grease makes this shuttle pin bind in its aluminum bore. You'll hear the motor hum under locked-rotor load without turning, or you'll get an annoying two-second lag when pulling the gun trigger. Pop the unloader retaining clip, pull the shuttle pin, and coat its EPDM O-rings with Super Lube 21030 silicone grease to bring back instant microswitch snap.
The low four-caster chassis stops rollover dead in its tracks. But the stiff 15-foot plastic hose fights back every foot of the way. Pull it sideways, and the light 19-pound cart drags across the pavement or tips nose-first into curbs. The real weak point is the stock plastic 3/4″ GHT garden hose inlet adapter. Heavy brass hose couplings chew right through soft nylon threads. Under suction, the pump sucks air bubbles through those chewed threads. Air ingestion leads to vicious cavitation, rattling check valves, and pressure dropouts. Thread a machined-brass 3/4″ garden hose quick-connect fitting onto the pump inlet neck to lock out air leaks for good.
Frequently Asked Questions: Westinghouse ePX2000
Quick mechanical answers for troubleshooting connections, leaks, and upgrades.
Why does my Westinghouse ePX2000 foam cannon produce thin, runny foam?
The ePX2000 flows roughly 1.15 GPM, which is too weak to create enough suction through a standard 1.25mm foam cannon orifice. Swap the internal brass jet for a 1.1mm orifice. The narrower jet spikes fluid velocity across the Venturi chamber to churn out rich shaving-cream foam.
Why does the motor hum and trip the electrical breaker when I pull the trigger?
Trapped head pressure or a sticking Total Stop System (TSS) microswitch forces the universal motor to pull locked-rotor current over 35 amps. Squeeze the spray gun trigger to bleed line pressure before turning on the power switch. Don't run this machine on thin 16 AWG extension cords that cause line voltage drop.
What hose fitting size does the Westinghouse ePX2000 use?
Both the pump outlet and spray gun inlet take standard M22-14mm male threads with a 14.0mm inner stem pin. Flexible aftermarket 1/4-inch lines like UberFlex bolt right on without extra adapters. Don't use M22-15mm fittings; that 1.0mm slop will spray water all over your shoes.
Why is water spraying from the garden hose connection on my ePX2000?
The factory composite 3/4-inch GHT inlet adapter has cross-threaded or crushed its rubber sealing washer. Replace the soft plastic adapter with a solid brass garden hose swivel coupler. Drop in a fresh 40-mesh stainless steel filter washer to keep abrasive dirt out of the pump.
Can I use a surface cleaner with the Westinghouse ePX2000?
Stick to a compact 10-inch or 11-inch surface cleaner built for electric washers. At 1.15 GPM and 1,200 operating PSI, the machine delivers just 0.81 Water HP. Dual-nozzle 14-inch commercial decks need way more hydraulic energy and won't spin fast enough to clean.