Pro Triplex Pump for Heavy-Duty Cleaning
The GP EZ4040G Pump Assembly (Bare Pump Part #85.130.021) is a professional triplex direct-drive gas pump built for pros and contractors who need reliable, long-lasting performance in high-demand applications. With 4,200 PSI at 4.2 GPM, this pump delivers the cutting pressure and volume needed to tackle the toughest cleaning jobs.
Made by General Pump (GP) — one of the most trusted names in pump technology — the EZ4040G features a brass manifold, ceramic plungers, and external unloader for years of trouble-free operation. Backed by a 5-year warranty, this pump is built for contractors, industrial operators, and serious users who demand consistent results.
The triplex plunger design sets the EZ4040G apart from axial pumps — smoother operation, less vibration, and longer service life. Three ceramic plungers handle high temperatures and abrasion for consistent high performance across demanding applications including paint stripping, degreasing heavy equipment, and fleet and construction site cleaning.
Key Features
?Triplex direct-drive design — smoother, quieter, and longer-lasting than axial cam pumps
?Ceramic plungers — maximum heat and abrasion resistance for long-term, high-pressure operation
?Brass manifold — corrosion-resistant construction for extended service life
?External unloader (#85.300.037) — easy access for adjustment and replacement without disassembly
?Thermal relief valve included (#85.300.023) — protects the pump from heat buildup during trigger-off periods
?Adjustable soap injector (#85.400.000) — built-in detergent injection for versatile cleaning applications
?5-year warranty — General Pump stands behind every EZ-series pump for professional use
?1" horizontal shaft / direct drive — compatible with most gas engine pressure washer frames
Specifications
Bare Pump Part #
85.130.021
Pump Manufacturer
General Pump (GP)
Pump Style
Triplex, Direct-Drive Gas
Unloader Type
External — #85.300.037
Inlet Size
3/4" GHF (Garden Hose Fitting)
Discharge Size
3/8" Brass QC — #85.300.108
Soap Injector
Adjustable — #85.400.000
Thermal Relief Valve
#85.300.023 — Included
Max Inlet Temperature
74°C / 165°F
Oil Type
30W Non-Detergent
