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CAL PUMP
Seawater Circulation Pumps

Seaweed-clogged intakes will cause marine air conditioning pumps to run dry, burning out the motor of most pumps. These sturdy, stainless steel and bronze pumps have thermal overload protection and can run dry without failing. The pump motor is permanently sealed in nontoxic lubricant for years of reliable running. Can be submerged.

Pumps are not self-priming and must be located below the waterline. Operates on 110V AC. Each pump is UL-listed, ABYC-compliant and USCG-approved. One-year warranty.

Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Seawater Circulation Pump, 1200 gph 280100 MS1200-6B
In stock online.

$284.99

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Seawater Circulation Pump, 320 gph 280290 MS320-6B
In stock online.

$177.99

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Seawater Circulation Pump, 580 gph 280050 MS580-6B
In stock online.

$269.99

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Product Description

Seaweed-clogged intakes will cause marine air conditioning pumps to run dry, burning out the motor of most pumps. These sturdy, stainless steel and bronze pumps have thermal overload protection and can run dry without failing. The pump motor is permanently sealed in nontoxic lubricant for years of reliable running. Can be submerged.

Pumps are not self-priming and must be located below the waterline. Operates on 110V AC. Each pump is UL-listed, ABYC-compliant and USCG-approved. One-year warranty.

Specs

REVIEW SNAPSHOT®

by PowerReviews
Cal PumpSeawater Circulation Pumps
 
2.1

(based on 17 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (12)

31%

of respondents would recommend this to a friend.

Pros

  • Easy to install (7)
  • Quiet (5)

Cons

No Cons

Best Uses

No Best Uses
    • Reviewer Profile:
    • Quality oriented (12)
    • Primary use:
    • Personal (15)

Most Liked Positive Review

 

Pretty good pump

My aircon CAL Pump has been leaking oil since 2 years into service and finally, it trips due to overheat after 4years with total loss of oil. Simple solution, open the large allen...Read complete review

My aircon CAL Pump has been leaking oil since 2 years into service and finally, it trips due to overheat after 4years with total loss of oil. Simple solution, open the large allen grub screw infront of pump, pour in Luboil (same SAE 15W40 as for my diesel engine), re-orientate the cable entry to top facing and the pump is back in service. Was leaking oil through cable gland when gland was faced down. Great pump, no need to buy replacement.

VS

Most Liked Negative Review

 

Over heats, shuts down, Only lasted 1 ye

Please read other reviews as it seems there is an inherent problem with these pumps losing the oil and overheating and shutting down. Mine only lasted a little more then a year. Buy the...Read complete review

Please read other reviews as it seems there is an inherent problem with these pumps losing the oil and overheating and shutting down. Mine only lasted a little more then a year. Buy the March pump. They last longer.

Reviewed by 17 customers

Displaying reviews 1-10

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1.0

Only got 2 years from it

By Rick

from Boston, MA

About Me Advanced

Verified Reviewer

Pros

    Cons

    • Unreliable

    Best Uses

      Comments about Seawater Circulation Pumps:

      Started pushing oil through the electrical cord into my air conditioners electrical box. I can only assume that the oil in the motor is being displaced by water. Replacing it with a March pump.

      • Was this a gift?:
      • No

      (2 of 2 customers found this review helpful)

       
      1.0

      Over heats, shuts down, Only lasted 1 ye

      By Dave

      from Connecticut

      About Me Quality Oriented

      Verified Reviewer

      Pros

      • Easy To Install
      • Nice Mounting Bracket
      • Quiet

      Cons

      • Didn't Last Long
      • Runs Hot
      • Slightly More Expensive

      Best Uses

        Comments about Cal Pump Seawater Circulation Pumps:

        Please read other reviews as it seems there is an inherent problem with these pumps losing the oil and overheating and shutting down. Mine only lasted a little more then a year. Buy the March pump. They last longer.

        • Primary use:
        • Personal
         
        1.0

        Fails in controlled conditions

        By Fountain-less

        from Seattle, WA

        About Me Quality Oriented

        Verified Reviewer

        Comments about Cal Pump Seawater Circulation Pumps:

        I have the S580 model in a fountain that I run about 4 months out of the year for a few hours a week. I completely drain the fountain and cover it for the winter.

        The GFCI keeps tripping now when I plug it in, I did notice oil leakage from the power cord plug into the motor. Lasted 6 years in what I would called very controlled conditions. Seems this pump was designed for more heavy duty applications but it can't handle moving 40gph of clear clean water.

        • Primary use:
        • Personal

        (2 of 2 customers found this review helpful)

         
        1.0

        Only lasted 18 months

        By Captain Bill

        from Marathon, FL

        About Me Quality Oriented

        Pros

        • Easy To Install
        • Exact Replacement

        Cons

        • Doesn't Last

        Best Uses

          Comments about Seawater Circulation Pumps:

          Purchased this pump as an exact replacement 18 months ago. It has always run hot and now shuts down after running for a couple hours. Since the pump is 6 months out of warrantee, I will be looking for a differ pump as a replacement

          • Primary use:
          • Personal

          (1 of 1 customers found this review helpful)

           
          1.0

          Don't waste your money

          By Dive Zone Scuba

          from Houston, TX

          About Me Quality Oriented

          Verified Reviewer

          Comments about Seawater Circulation Pumps:

          This pump make runs extremelly hot. Called the mfg about this and they said I should run it in a bucket. Wasn't going to do that. Turns out at one point a thing called an ice cube was available. This is a plexiglass box that the pump used to circulate water around itself so it wouldn't fry itself.

          West Marine shouldn't be carrying this product.

          • Primary use:
          • Personal

          (1 of 1 customers found this review helpful)

           
          1.0

          paulbec

          By paulbec

          from FLorida

          About Me Value Oriented

          Comments about Seawater Circulation Pumps:

          Installed the 3 rd pump in three years only because it was a new system an I wanted to keep with the manufacture spec . when with a different pump now for a better return on my $$.

          • Primary use:
          • Personal
           
          1.0

          Rotten pump

          By Marc

          from Deep River, CT

          About Me Quality Oriented

          Pros

            Cons

            • Short Life

            Best Uses

              Comments about Seawater Circulation Pumps:

              Installed as replacement air conditioner pump on boat 11 months ago. Pump runs very hot and didn't even last a year. Would never purchase again.

              • Primary use:
              • Personal

              (2 of 2 customers found this review helpful)

               
              1.0

              Cal pump 1200 and 580

              By Island Guy

              from Key Largo, FL

              About Me Quality Oriented

              Verified Reviewer

              Pros

              • Easy To Install
              • Quiet

              Cons

              • Leaks

              Best Uses

              • Any Room

              Comments about Seawater Circulation Pumps:

              Since the boat came with a Cal pump 1200, I assumed this was the right pump for the job and replaced it with same. As experienced by other reviewers, I have had to replace the pump every one to two years. West Marine has always honored the warranty and provided a replacement, but it requires an hour in a tight space to remove and replace the plumbing and electrical connections. If one happens to run just over the two year warranty, you get to pay for a new one. These pumps are quiet, but run very hot - too hot to touch. My guess is that they were designed to run submersed in water, as in a fountain. The extreme temperature changes seem to cause the stainless cover to separate from the brass base, causing the oil to leak out, create a mess, and leading to motor failure.

              • Primary use:
              • Personal
               
              4.0

              Pretty good pump

              By Ken

              from Singapore

              About Me Quality Oriented

              Verified Reviewer

              Pros

              • Easy To Install
              • Quiet

              Cons

                Best Uses

                • Aircon Cooling Water

                Comments about Seawater Circulation Pumps:

                My aircon CAL Pump has been leaking oil since 2 years into service and finally, it trips due to overheat after 4years with total loss of oil. Simple solution, open the large allen grub screw infront of pump, pour in Luboil (same SAE 15W40 as for my diesel engine), re-orientate the cable entry to top facing and the pump is back in service. Was leaking oil through cable gland when gland was faced down. Great pump, no need to buy replacement.

                • Primary use:
                • Personal

                (3 of 3 customers found this review helpful)

                 
                1.0

                Two years...Two pumps

                By Knot Dreamin'

                from Solomons, MD

                About Me Quality Oriented

                Verified Reviewer

                Pros

                • Easy To Install

                Cons

                • Fails Prematurely
                • Leaks Dielectric

                Best Uses

                • Dinghy Anchor

                Comments about Seawater Circulation Pumps:

                I have replaced two MS-580s in two seasons. Each was used to run my 16K BTU Marine Air AC. While they appear rock-solid and are easy to install, both began leaking their dielectric fluid into my bilge half-way through the summer. While the company declares they have a thermal switch to prevent damage if the intake is clogged, it seems they do not shut off until they are already leaking. Unless you plan to only use these pumps a few months out of the year in crystal clear water, I highly recommend looking at another pump.

                • Primary use:
                • Personal

                Displaying reviews 1-10

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