CAT Pumps 3CP1120CS.3000 Pump, 4.2 GPM, 2200 PSI
Genuine Cat Pumps OEM — Cat Pumps Corporation, HQ Minneapolis, MN — supplied by ForeverPure Corporation, an authorized Cat Pumps distributor in Santa Clara, California.
The Cat Pumps 3CP1120CS.3000 is a triplex plunger pump in the Cat Pumps 3CP Series Triplex Plunger Pump family, rated for 4.2 GPM at 2200 PSI. 3CP compact triplex plunger pumps are OEM-grade direct-drive pumps for commercial pressure cleaning, car wash, and reverse osmosis boosting.
Typical Applications & Industries
Common Applications
- Commercial pressure washers
- Car wash
- Low-flow RO feed
- Mobile detailing
Industries Served
- Water treatment & desalination
- Commercial car wash & detailing
- Agriculture & irrigation
- Oil & gas (produced water)
- Food & beverage processing
- Industrial cleaning & facility services
Documentation & Service
📄 Cat Pumps Data Sheet (PDF)🔧 Cat Pumps 3CP Brass Series Plunger Pump Service Manual (PDF)
The data sheet carries the specifications, the exploded view, the numbered parts list and the seal and valve kit tables. The 3CP has its own service manual — separate from the rest of the CP range — covering installation and start-up, safety, valve and seal servicing, the torque chart and troubleshooting.
Servicing the seals — Cat Pumps 3CP1120 / 3CP1130 / 3CP1140 — Cat Pumps
Servicing the valves — Cat Pumps 3CP1110CS / 3CP1120 / 3CP1130 / 3CP1140 — Cat Pumps
Dimensions & Mechanical Data
Overall size: 9.13 x 8.78 x 5.71" (231 x 223 x 145 mm) — weight 14.84 lbs (6.7 kg). The shipping weight shown at checkout already allows for packaging.
Rated pump speed 1725 rpm; Cat Pumps gives a minimum of 100 rpm for this frame.
| Mechanical specification | U.S. | Metric |
|---|---|---|
| Inlet pressure range | Flooded to 70 psi | Flooded to 4.8 bar |
| Max. liquid temperature (NBR) | 160° F | 71° C |
| Bore | 0.709" | 18 mm |
| Stroke | 0.500" | 12.7 mm |
| Crankcase capacity | 12 oz | 0.35 l |
| Inlet ports (2) | 1/2" NPT(F) | 1/2" NPT(F) |
| Discharge ports (2) | 3/8" NPT(F) | 3/8" NPT(F) |
| Shaft diameter | 0.650" | 16.5 mm |
Figures from the Cat Pumps data sheet for this model (3CP1120_P). Cat publishes the envelope and the port and shaft interface above but no dimensioned outline drawing; ask us if you need one for a skid layout.
Performance & Sizing
The 3CP1120CS.3000 is a positive-displacement triplex plunger pump, so it has no flow-versus-pressure curve in the sense a centrifugal pump does, and Cat Pumps does not publish one. Flow is set by the plunger displacement and the shaft speed and stays essentially constant as discharge pressure rises. Pressure is set by the restriction downstream — the nozzle, orifice or membrane array — and capped by the regulating device, not by the pump.
The 3CP is a direct-drive frame, so the motor sets the pump speed directly. To run at a speed other than the rated 1725 rpm, or to size a motor and pulleys, use the relations printed on the Cat Pumps data sheet:
| Flow at another speed | Desired GPM = Rated GPM × (Desired RPM ÷ Rated RPM) |
| Required horsepower | HP (electric brake) = GPM × PSI ÷ 1460 |
| Motor pulley size | Motor pulley OD = (Pump pulley OD × Pump RPM) ÷ Motor RPM |
Maximum ratings apply individually — do not assume maximum flow and maximum pressure can be taken together. A primary pressure-regulating device and a secondary safety relief device are both required in the system. Talk to us before ordering if your duty sits near a limit.
Frequently Asked Questions
What is the Cat Pumps 3CP1120CS.3000?
The Cat Pumps 3CP1120CS.3000 is a triplex plunger pump from the Cat 3CP Series Triplex Plunger Pump family, rated at 4.2 GPM and 2200 PSI maximum pressure. Cat Pumps are positive-displacement triplex pumps supplied by Cat Pumps Corporation, headquartered in Minneapolis, Minnesota, USA.
What is the Cat Pumps 3CP1120CS.3000 used for?
Typical applications include commercial pressure washers, car wash, low-flow ro feed, mobile detailing. Cat Pumps triplex pumps are preferred in continuous-duty industrial service because their positive-displacement plunger or piston design delivers smooth constant flow at high pressure with long service life.
How much does the Cat Pumps 3CP1120CS.3000 cost?
Pricing is quote-based and depends on configuration, quantity, and delivery schedule. ForeverPure Corporation, as an authorized Cat Pumps distributor, provides factory-direct pricing with same-day quotes. Call +1-408-969-2688 or use the Request a Quote form.
What parts and service kits are available for the Cat Pumps 3CP1120CS.3000?
A full line of genuine Cat Pumps OEM service kits, seals, valves, plungers, and accessories is available. The specific kits compatible with 3CP1120CS.3000 depend on the pump's frame, material, and seal material — contact ForeverPure for a cross-reference list and current pricing.
Where is the Cat Pumps 3CP1120CS.3000 manufactured?
Cat Pumps Corporation is headquartered in Minneapolis, Minnesota (1681 94th Lane NE, Minneapolis, MN 55449) and has been the Cat Pumps brand owner since 1968. Cat Pumps triplex pumps, spare parts, and accessories are manufactured at the company's US and Japan production facilities to Cat Pumps Corporation's ISO 9001:2015 factory specifications — the country of origin for this specific SKU is listed in the technical specifications table above.
How do I get a quote or datasheet for the Cat Pumps 3CP1120CS.3000?
Call ForeverPure Corporation at +1-408-969-2688, email sales@foreverpure.com, or request a quote through the website. As an authorized Cat Pumps distributor, ForeverPure provides factory-direct pricing, datasheets, cross-reference support, and same-day turnaround on most quote requests.
What is the warranty on the Cat Pumps 3CP1120CS.3000?
Cat Pumps factory warranty: 1 year on complete pumps, 90 days on parts and accessories, from date of purchase from an authorized distributor. ForeverPure honors and administers Cat Pumps warranty claims for customers in North America.
