General Pump EZ4040G Flanged Gasoline Triplex Plunger Pump - 4.0 GPM, 4200 PSI, 3400 RPM

The EZ4040G General Pump is a reliable, high-performance pressure washing option. It is designed using a forged brass manifold. The pump incorporates an SAE J609 gasoline mounting flange with which you can mount up to 13 HP engines. 

Another benefit of the EZ4040G pump is its unique durability. It offers a maximum fluid temperature of 165 F. It can operate at a speed of up to 3400 RPM. It's capable of supporting a discharge pressure up to 4200 PSI to go with a maximum inlet pressure of 125 PSI. 

The list of worthwhile features continues to expand and includes its forged brass manifold with 3:1 hydrostatic rating, its premium roller bearing, its die-cast, anodized aluminum oil-bath crankcase, and its clever one-piece plunger design which eliminates water entering the crankcase. 

Specifications: 

• Maximum Volume: 4.0 GPM  
• Maximum Discharge Pressure: 4200 PSI 
• Maximum Pump Speed: 3400 RPM 
• Maximum Inlet Pressure: 125 PSI 
• Maximum Inlet Vacuum: 3 ft. water (2.6 in. Hg) 
• Plunger Bore: .512 in. / 13 mm 
• Plunger Stroke: .512 in. / 13 mm 
• Crankcase Oil Capacity: 14.0 oz. 
• Maximum Fluid Temperature: 165° F 
• Inlet Port Thread: 1/2-14 BSPP-F 
• Discharge Port Thread: 3/8-19 BSPP-F 
• Shaft Diameter: 1.0 in. / 25.4 mm 
• Weight: 20 lbs. 
• Dimensions: 8.8" x 9.7" x 6.5" 

Pressure Washing Features: 

• Standard SAE J609 gasoline mounting flange for up to 13 hp engines 
• Forged brass manifold with an exclusive lifetime warranty and 3:1 hydrostatic rating 
• Die-cast, anodized aluminum oil-bath crankcase 
• Innovative one-piece plunger design to eliminate water entering crankcase 
• Premium roller bearing 
• 5% reduction in crankcase load compared to standard 3,000 PSI, 15 mm pumps 
• Unitized stainless steel inlet and discharge valves

About Expert Power Wash

Expert Power Wash is built and operated by Tim and Kristina — a team passionate about giving
pressure washing professionals the best equipment available. Every skid is hand-built in Oregon City, OR, with a focus on quality, reliability, and ease of use in the field.

Our goal is to source 95% of the parts we use from the USA. We distribute across 24 states, Canada, and overseas — backing every unit with a lifetime warranty and personal customer support. We don't just sell equipment; we help you build a successful business with hands-on training and ongoing guidance

Shipping & Pickup

We recommend in-person pickup in Oregon City, OR — this includes a free 2-hour
hands-on training session so you leave confident operating your skid. Transport
shipping is also available and coordinated directly with you.