SKU: 4777 Category:


Industrial duty plunger pump.


Increased fin depth increases surface area to maximize heat dissipation

Reinforced crankcase for increased load capacity

Enlarged crankcase increases oil capacity for better lubrication and will lower operating temperatures

One piece industrial grade oversized bronze connecting rods

Stainless steel unitized check valves

Heat resistant solid ceramic plungers operating on lubricated packings

Technical Notes


Maximum Flow: 4.0 GPM

Maximum Pressure: 3000 PSI

Maximum Pump Speed: 3400 RPM

Minimum Horsepower Requirements: 12.3 hp for gas engines

Inlet: 1/2″FPT

Discharge: 3/8″FPT

Shaft Diameter: Hollow 1″ with gas flange

Crankcase Capacity: 11 oz use SAE 20W/30 oil

Weight: 20.3 lbs

Lubrication: fill crankcase with SAE 20W/30 oil per pump specifications. Change oil after initial 50 hour break in period, then in 500 hour intervals thereafter.

The Comet pump is warranted by the manufacturer to the original purchaser to be free from defects in material and workmanship under normal use and service. “Normal use and service” means not in excess of the recommended maximum speeds, pressures, and temperatures or handling fluids not compatible with component materials. This warranty shall not apply to any pump which has been repaired or altered to affect the performance or reliability of the pump. Warranty does not apply to (a)freight, (b) freezing damage, (c) damage caused by parts or accessories not obtained from or approved by Comet, (d) damaged by misuse and/or misapplication, (e) normal wear of moving parts or components affected by moving parts.

Period of warranty shall be five years from date product is shipped from manufacturer’s factory. Liablity of manufacturer under the foregoing warranty is limited to repair or replacement at the option of manufacturer of that product, which according to the manufacturer’s investigation was deemed defective at time of shipment. This warranty is lieu of all other warranties, expressed or implied, including any warranty of meerchantability and/or any and all other obligations or liabilities on the part of the manufacturers.


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