Best Cast Iron Sump Pumps

Last updated: October 31, 2026

Pumps with a cast iron motor housing, which sheds heat and outlasts plastic.

Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Best Cast Iron Sump Pumps: Up to 1/3 HP

  1. Red Lion RL-33SC
    #1 of 83.7Full review

    For a small pit with a real lift, where a compact cast iron pump with strong flow is worth a little more.

    Amazon $203.84
    $203.84
    1/3 HP3,000 GPHTethered float
  2. Little Giant 6EC-CIA-SFS
    #2 of 83.6Full review

    For a basement with a higher lift where a 1/3 HP pump with near 1/2 HP flow and a cast iron body is wanted.

    Amazon $220.50
    $220.50
    1/3 HP3,000 GPHTethered float
  3. Red Lion RL-SC33T
    #3 of 83.3Full review

    For a standard or wide pit where a well priced cast iron 1/3 HP pump with good flow is wanted.

    Amazon $182
    $182
    1/3 HP2,460 GPHTethered float
  4. Liberty Pumps 257
    #4 of 83.1Full review

    For a typical basement where a long lasting cast iron pump with a reliable float matters more than raw flow.

    Amazon $216.29
    $216.29
    1/3 HP2,220 GPHVertical float
  5. Zoeller M63 Premium
    #5 of 83.0Full review

    For owners who want the longest lasting 1/3 HP class pump and are willing to pay for an all cast iron build and a 5 year warranty.

    Amazon $311.25
    $311.25
    0.3 HP2,040 GPHVertical float
  6. Zoeller M53 Mighty-Mate
    #6 of 83.0Full review

    For a typical basement where you want a proven cast iron pump that will run for years. Buyers with a lift over 15 ft should step up to a 1/2 HP pump.

    Amazon $188.33
    $188.33
    0.3 HP2,040 GPHVertical float
  7. Superior Pump 92341
    #7 of 83.0Full review

    A sturdy, low cost cast iron pump for a shallow basement with modest water. Pick a higher flow pump if the pit fills fast.

    Amazon $140.22
    $140.22
    0.3 HP1,800 GPHVertical float
  8. Little Giant 6-CIA
    #8 of 82.5Full review

    For a small or shallow pit with light inflow and a low lift, where a compact cast iron pump with no float is the priority.

    Amazon $213.95
    $213.95
    1/3 HP1,740 GPHDiaphragm

Best Cast Iron Sump Pumps: 1/2 HP and up

  1. Zoeller M95 Premium
    #1 of 63.5Full review

    For a basement that floods hard and often, where an owner wants maximum flow with a 5 year warranty and an all cast iron build.

    Amazon $432.16
    $432.16
    1/2 HP4,000 GPHVertical float
  2. Zoeller M98 Flow-Mate
    #2 of 63.1Full review

    For basements with a high water table or a deep pit where a 1/3 HP pump runs constantly. The cast iron build suits long, heavy duty cycles.

    Amazon $328.80
    $328.80
    1/2 HP3,660 GPHVertical float
  3. Red Lion RL-SC50V
    #3 of 63.1Full review

    For most basements that want 1/2 HP cast iron flow with a vertical float at a fair price.

    Amazon $205.77
    $205.77
    1/2 HP3,000 GPHVertical float
  4. Little Giant BSC50V
    #4 of 63.0Full review

    For most basements that want strong 1/2 HP cast iron flow at a modest price.

    Amazon $180.19
    $180.19
    1/2 HP3,000 GPHVertical float
  5. Liberty Pumps 287
    #5 of 62.9Full review

    For a deep basement or a pit that fills fast, where a strong cast iron pump that fits a narrow pit is worth paying for.

    Amazon $323.25
    $323.25
    1/2 HP3,300 GPHVertical float
  6. Little Giant 10EC-CIA-SFS
    #6 of 62.6Full review

    For a deep basement or long discharge run where flow at 20 ft and beyond matters most.

    Amazon $379.99
    $379.99
    1/2 HP3,420 GPHTethered float