The Chicago Pneumatic RCP-4981VNS is a 5 HP two-stage compressor with an 80-gallon vertical receiver, a solid cast iron cylinder, and an integrated aftercooler. It operates on 230V single-phase power and uses start-stop pressure-switch control. The aftercooler is the key feature that separates this model from simpler compressors in its class: it reduces the temperature of compressed air before it reaches the receiver, helping moisture condense where it can be drained instead of continuing into downstream equipment. Note: a magnetic starter is not included, so suitable motor switching and overload protection should be addressed with your electrician before installation.
The integrated aftercooler provides a practical benefit beyond temperature control. Compressing air generates heat, and hot compressed air can carry moisture downstream that later condenses in tanks, piping, tools, or finishing equipment. By cooling the discharge air before it reaches the receiver, the aftercooler helps move more of that moisture out of the air stream at the tank. The two-stage pump also compresses air in two steps rather than one, while the solid cast iron cylinder provides the construction specified for this compressor. A fully enclosed motor and high-flow belt guard protect the drive components while still allowing the airflow needed to cool the pump.
This compressor is suited to home garages, farm workshops, and smaller automotive shops looking for the higher-pressure capability of a two-stage machine without moving to a larger all-cast-iron package. Its vertical 80-gallon receiver makes better use of available floor space, while the 5 HP motor and integrated aftercooler provide a practical combination for general shop air. Buyers should pay particular attention to the electrical setup because the machine does not include a magnetic starter, and should confirm the published CFM and maximum-pressure ratings before purchasing, as the available product information gives conflicting figures for both.
Specifications
| Model |
RCP-4981VNS |
| Motor |
5 HP, electric |
| Pump |
Two-stage, solid cast iron cylinder |
| Aftercooler |
Integrated |
| Tank |
80 gallon, vertical |
| Power |
230 Volt, 1 phase |
| Magnetic starter |
Not included |
| Tank outlet |
3/4" |
| Overall length |
39" |
| Weight |
382 lbs |
| Warranty |
2 year |
| Origin |
Made in the USA |
Delivered air and maximum pressure are deliberately absent from this table — see the section above for why. Overall width and height are recorded in our data as bare numbers with no unit, so they are not printed either; ask us and we will confirm the envelope before you plan the space.
Certification, Stated Honestly
Some Chicago Pneumatic compressors in this range are described as having certified pressure vessels and safety valves. Our data for this particular model does not state a tank certification, and no third-party product safety listing is recorded either.
That does not mean the tank is uncertified; it means our current documentation does not establish the certification. If pressure-vessel certification is required by your insurer, local inspection requirements or company policy, contact us before ordering and we will obtain written confirmation from the manufacturer.
Shipping & Delivery
Ships by palletized freight to the lower 48 states. At 382 lbs, it is lighter than many compressors in this class, but still requires a suitable unloading plan. Arrange a forklift or loading dock, or choose terminal pickup. Residential delivery carries an additional fee.
Inspect the shipment before signing. Photograph the crate and pallet, and record any damage on the bill of lading with the driver present.
Warranty
Our specification record states a 2-Year warranty. Chicago Pneumatic publishes the detailed warranty terms separately, and this listing links to that policy rather than paraphrasing it.
If a failure occurs, stop using the compressor and contact us before disassembly. Keep the pump, motor and pressure switch intact for inspection, photograph the condition as found, and provide the unit's serial number when opening the claim.
