Best 1/3 HP Sump Pumps Ranked

16 sump pumps of 1/3 HP and less.

Last updated: October 31, 2026

A 1/3 HP pump handles most basements: a lift of up to about 10 ft and a pit that fills at a normal rate in heavy rain. It costs less and draws less current than a 1/2 HP pump, which also makes it easier for a battery backup or generator to run.

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.

Full ranking 16

  1. Wayne CDU790
    #1 of 164.1Full review

    A strong value for an ordinary basement: more flow at 10 ft than most 1/3 HP pumps for a modest price.

    Amazon $136.90
    $136.90
    1/3 HP3,060 GPHVertical float
  2. Red Lion RL-33SC
    #2 of 163.7Full 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
  3. Little Giant 6EC-CIA-SFS
    #3 of 163.6Full 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
  4. Wayne SPF33
    #4 of 163.5Full review

    A light, low cost pump for a shallow basement with modest water. The 1 year warranty makes it a budget pick rather than a long term one.

    Amazon $128.20
    $128.20
    1/3 HP2,718 GPHVertical float
  5. Red Lion RL-SP33V
    #5 of 163.4Full review

    For a narrow pit on a budget, where a light pump with good flow and a vertical float does the job.

    Amazon $114.99
    $114.99
    1/3 HP2,366 GPHVertical float
  6. Red Lion RL-SC33T
    #6 of 163.3Full 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
  7. Red Lion RL-SP33PED
    #7 of 163.1Full review

    For a narrow or shallow pit with a low lift, where a cheap pump with the motor out of the water is the easiest fix.

    Amazon $105.84
    $105.84
    1/3 HP2,040 GPHVertical float
  8. Liberty Pumps 257
    #8 of 163.1Full 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
  9. Zoeller M63 Premium
    #9 of 163.0Full 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
  10. Zoeller M53 Mighty-Mate
    #10 of 163.0Full 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
  11. Superior Pump 92341
    #11 of 163.0Full 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
  12. Liberty Pumps S37
    #12 of 163.0Full review

    For a newer house or a gritty pit where a low cost Liberty pump that resists debris jams is enough.

    Amazon $165
    $165
    1/3 HP2,100 GPHVertical float
  13. Superior Pump 92372
    #13 of 162.6Full review

    An inexpensive light duty pump for a basement that sees occasional water. The 1 year warranty makes it a short term choice.

    Amazon $113.99
    $113.99
    1/3 HP1,800 GPHVertical float
  14. Little Giant 6-CIA
    #14 of 162.5Full 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
  15. Liberty Pumps 237
    #15 of 162.5Full review

    For a narrow or shallow pit with modest inflow, where a light, compact Liberty pump with a magnetic float is enough.

    Amazon $188.95
    $188.95
    1/3 HP1,800 GPHVertical float
  16. Superior Pump 92250
    #16 of 161.9Full review

    A bare budget pump for a small, mostly dry pit or a spare. Homes with real water problems need more flow.

    Amazon $95.49
    $95.49
    1/4 HP1,200 GPHTethered float