Factory-Direct Free Shipping within 72 hours.  
In-Stock items ship direct from our Rialto, CA. Store within 24 hrs. 

The CAT Pumps 390 model is a positive displacement, reciprocating pump with a three piston rod triplex design. This five frame pump features a brass manifold, 304 stainless steel valve assemblies, chrome-plated 304 stainless steel cylinders, and standard Buna-N o-rings and seals.

The CAT Pumps 390 pump has a low RPM that is designed for belt drive applications. Its Uniflow design includes a mechanically actuated inlet valve that provides constant forward flow and strong suction. 1" NPTM x 1/2" NPTF ports are located on the side for easy plumbing. Maximum flow rate of 12 GPM and a maximum pressure rating of 600 PSI. Extreme durability and incredible abrasion resistance make this perfect for demanding environments like high-volume car washes and commercial pressure washing.

Dimensions: 14.3" x 10.0" x 5.28"

Specifications:

• Maximum Flow: 5 GPM
• Minimum Pressure: 1000 PSI
• Maximum Pressure: 600 PSI
• RPM: 1040
• Inlet Port Size: 1" NPT (M)
• Discharge Port Size: 1/2" NPT (F)
• Drive Type: Belt
• Manifold Material: Brass
• Bore: 1.26" (32 mm)
• Stroke: .629 (16 mm)
• Maximum Liquid Temperature: 140° Fahrenheit
• 18.8 lbs. 

Superior Design:

• Triplex Uniflow design provides continuous forward liquid flow for smooth operation.
• Wetted cups and floating pistons are lubricated and cooled by pumped liquid for long cup life.
• Mechanically actuated inlet valves give strong lift and easy prime.
• Precision design 304 stainless steel valves and seats are hardened and polished for ultimate seating and extended valve life.
• Oil bath crankcase assures optimum lubrication.
• 100% wetted seal design allows pumped liquid to cool and lubricate for longer life.

Quality Materials:

• Cylinder and sleeve wear surfaces are hard chrome plated 304 stainless steel for maximum durability and abrasion resistance.
• Chrome-plated brass manifold for strength and corrosion resistance.
• Special high strength TNM connecting rods offer superior bearing quality strength.
• Chrome-moly crankshaft gives unmatched strength and surface hardness.
• Oversized crankshaft bearings with greater loading capacity mean longer bearing life.

Assembled in the USA