Comet APS41P Diaphragm Pump

High pressure, three diaphragm pump with plastic coated heads and Duraphragm technology.
Comet APS41P Diaphragm Pump with plastic coated heads for excellent corrosion resistance.

Comet APS41P Diaphragm Pump with plastic coated heads for excellent corrosion resistance.

  • Comet Plastic Coated APS41PGR Diaphragm Pump
    CAD $1,604.00
  • Comet APS41 Repair Kit
    CAD $150.84
  • Comet Pressure Regulator
    CAD $242.27
    • Buy 2 for CAD $227.98 each and save 6%
    • Buy 6 for CAD $218.29 each and save 10%


The Comet APS41P Diaphragm Pump is a high pressure, three diaphragm pump capable of handling pressures up to 580 psi (40 bar) and flow rates up to 11 gpm (41.6 lpm), making it very versatile in many spraying applications.

This internally manifolded high pressure diaphragm pump has plastic coated pump heads for excellent resistance to corrosion. The valve plugs and discharge plate are also plastic coated for additional protection in the most common corrosive areas. The plastic coating is an electrostatic dipped coating that penetrates the surface of the aluminum and cannot be easily chipped during transport.

The pump's 6 hole flange shaft permits multiple applications and can be adapted to PTO, gas engine, hydraulic motor, or belt drive applications. Perfect for use in the nursery, agricultural, and horticultural industries.

Use the Comet APS41P Diaphragm Pump to pump and spray a range of agricultural chemicals, including liquid fertilizers, herbicides, pesticides, insecticides, de-icing materials, and other hard-to-handle fluids. It is great for handling certain harsh chemicals used for disinfecting, roof moss control, mosquito control, and more with its special plastic coating.

A unique feature on this pump is its "Duraphragm" technology, which extends the diaphragm's life by protecting it from being in direct contact with the chemical inlet. This spreads inlet vacuum, sometimes caused by a dirty suction filter or kinked hose, across the entire diaphragm surface rather than focusing it on one small area where most failures occur.

APS41P: Three diaphragm pump with universal drive face and mounting rails.

APS41P-GR: Three diaphragm pump with gear reduction for gas engines with 3/4" shafts.

Note: If you have an existing APS41P-GR and you need to replace the pump, the gearbox can be reused and all you need to order is the plain APS41P Pump.


  • Max. Flow: 11 gpm (41.6 lpm)
  • Max. Pressure: 580 psi (40 bar)
  • Max. Rated Speed: 550 RPM
  • Max. Fluid Temperature: 104° F (40° C)
  • Min. Power: 4.1 HP
  • Port Sizes: 1" (25 mm) inlet
  • Three semi-hydraulic diaphragms
  • High pressure pump
  • Plastic coated heads, valve plugs, and discharge plate
  • Pump Shaft Rotation: CW and CCW
  • Large capacity oil bath crankcase
  • Metal oil sight glass
  • Self-priming
  • Can be run dry
  • Can be adapted to PTO, gas engine, hydraulic motor, or belt drive applications
  • Weight (APS41P): 22 lbs. (10 kg)
  • Weight (APS41P-GR): 30 lbs. (13.6 kg)

The Comet 1204.0564 Pressure Regulator is recommended for the APS41P Diaphragm Pump. The Comet 5005.0216 Gear Reducer is recommended for the APS41P. Note the APS41P-GR includes both a regulator and gear reducer.

Comet 5026.0245 Repair Kit for the APS41 Diaphragm Pump includes:

  • 3 x 1800.0020 Buna Diaphragms
  • 6 x 1220.0052 Valve Assemblies
  • 6 x 1210.0015 Valve O-Rings
  • 6 x 1210.0048 O-Rings

See Related Information for more information on the Comet APS41P Diaphragm Pump.

Pay In Installments

Add one or more qualifying products to your cart and your entire order becomes eligible for interest-free installment plans of up to 6 months. Learn More

Some qualifying products such as sprayers and equipment require a shipping quote. Shipping will also qualify for installments. Contact us at 1-800-461-1041 or email Quotes are provided within 1 hour during normal business hours eastern standard time.

Related Information

Customer Reviews

Write Your Own Review

You're reviewing: Comet APS41P Diaphragm Pump

  • 1 star 2 stars 3 stars 4 stars 5 stars

* Required Fields

You might prefer