This pump accepts an engine with a 3/4 inch engine shaft. The engine used cannot be a gear reduction engine. This pump will accept a keyed engine shaft of 3/16 inch.
Free Gift Card Details
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 10/01/26.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
Comet Pumps, MP30 DIAPHRAGM PUMP, Max. Flow Rate 8 GPM, Model# MP30

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
Shipping:
Factory shippedStore Pickup:
Not available - online only
- Sprays up to 35 feet
- Easily couples to a gas engine with a 3/4in. keyed shaft
- Durable design with all moving parts in a complete oil bath, industrial duty bearings, anti-corrosion diaphragms and valves
- Includes pressure regulator with manual dump lever, 1in. inlet, two 1/2in. outlet barbs and 1/2in. bypass barb
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) Pump (1) Gearbox (1) Pressure regulator
Downloads
Features + Benefits
- Sprays up to 35 feet
- Easily couples to a gas engine with a 3/4in. keyed shaft
- Durable design with all moving parts in a complete oil bath, industrial duty bearings, anti-corrosion diaphragms and valves
- Includes pressure regulator with manual dump lever, 1in. inlet, two 1/2in. outlet barbs and 1/2in. bypass barb
Key Specs
| Attribute | Specification |
|---|---|
item# | 27528 |
Brand | Comet Pumps |
Manufacturer's Warranty | 24 months parts/24months labor |
Ship Weight | 32.0 LB |
Material | Aluminum |
Max. PSI | 435 |
Max. Flow Rate | 8 GPM |
| Attribute | Specification |
|---|---|
Max. Temperature | 100 °F |
Pump Type | Diaphragm |
Shaft Length | 0.75 in |
Self-Priming | Yes |
Seal Type | Buna |
Product Weight | lb |
Dimensions L x W x H (in.) | 12.0 x 10.0 x 12.0 in |
Reviews
Questions & Answers
Questions
-
· 4 months ago
What is the recommended gas motor for this pump
1 answer-
ProductExpert5· 4 months ago
Helpful?
-
-
· 4 years ago
Can this pump be used for roundup herbicide?
1 answer-
ProductExpert6· 4 years ago
The pump can be used with roundup.
Helpful?
-
-
· 4 years ago
Can this Comet Pump be used for waste motor oil pumping?
1 answer-
ProductExpert10· 4 years ago
The pump will not work for use with waste motor oil.
Helpful?
-
-
· 8 years ago
Can I use an electric motor to drive the pump?
1 answer-
ProductExpert31· 8 years ago
In the current configuration, this sprayer pump can not be powered by an electric motor. Additional parts are available from the manufacturer to run this on an electric motor.
Helpful?
-
-
· 8 years ago
Can this pump handle copper sulfate solution
1 answer-
ProductExpert11· 8 years ago
This pump includes aluminum cast, Buna, and polypropylene components. We recommend checking your copper sulfate to see if it has compatibility issues with those material types. If it doesn't have compatibility issues and won't be harmful to those materials, this pump can handle it.
Helpful?
-
-
· 10 years ago
What size of inlet hose and filter should be used?
1 answer-
ProductExpert11· 10 years ago
A 1" inlet hose and 1" filter should be used on this pump. The filter must be maintained and kept clean with frequent inspections especially if powder based products are used.
Helpful?
-
-
· 10 years ago
Does the comet mp30 require additional mounting than from the engine
1 answer-
ProductExpert40· 10 years ago
The pump comes with the gear box for mounting to the engine. If you want to mount the pump/engine to a skid of some kind, that mounting hardware is not included other than the pictured brackets on the bottom of the pump.
Helpful?
-
-
· 10 years ago
Will the comet pump model mp30 work with 300' - 1/2" hose
1 answer-
ProductExpert13· 10 years ago
This pump will work with 300' of 1/2" hose. There will be a loss of pressure and GPM, but there are too many variables to be able to calculate what the loss would be.
Helpful?
-
-
· 10 years ago
mounting
this pump comes with the gear box to mount it to a gasoline engine with 3600 rpm or do i need a gear box also
1 answer-
ProductExpert41· 10 years ago
This pump comes equipped with the gear box to mount a gasoline engine with 3600 rpm.
Helpful?
-
-
· 12 years ago
can you recommend an engene for it
1 answer-
ProductExpert6· 12 years ago
See below for a couple of recommendations to fit this pump.
Helpful?
-
Warranty
Manufacturer's Warranty
24 months parts/24months labor
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
Compare with Most Popular in Sprayer Pumps
See All Sprayer Pumps
See All Comet Pumps Sprayer Pumps
Currently Viewing This Product
$599.99Shipping:
Factory shippedStore Pickup:
Not available - online only
- $189.99
Shipping:
Factory shippedStore Pickup:
Not available - online only
- $139.99
Shipping:
Factory shippedStore Pickup:
Not available - online only
- $139.99
Shipping:
Available nowStore Pickup:
Out of stock at Fredericksburg VA
Specifications
Aluminum
-
-
Polypropylene
435
60
150
100
8 GPM
5.38 GPM
7 GPM
3 GPM
100 °F
120 °F
140 °F
140 °F
Diaphragm
-
-
Diaphragm
0.75 in
-
1.43 in
-
Yes
Yes
-
Yes
Buna
-
Viton
Santoprene
lb
lb
-
6.0000 lb
12.0 x 10.0 x 12.0 in
10.0 x 4.5 x 4.25 in
-
10.0 x 4.0 x 4.5 in
-
12
12
12
-
18
-
10
-
1/2
3/4
1/2
-
1/2
3/4
1/2
-
-
2,500
-
See All Sprayer Pumps
See All Comet Pumps Sprayer Pumps
Recently Viewed Items
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.



