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
- Red Lion RL-33SC#1 of 8Full 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$203.841/3 HP3,000 GPHTethered float - Little Giant 6EC-CIA-SFS#2 of 8Full 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$220.501/3 HP3,000 GPHTethered float - Red Lion RL-SC33T#3 of 8Full review
For a standard or wide pit where a well priced cast iron 1/3 HP pump with good flow is wanted.
Amazon $182$1821/3 HP2,460 GPHTethered float - Liberty Pumps 257#4 of 8Full review
For a typical basement where a long lasting cast iron pump with a reliable float matters more than raw flow.
Amazon $216.29$216.291/3 HP2,220 GPHVertical float - Zoeller M63 Premium#5 of 8Full 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$311.250.3 HP2,040 GPHVertical float - Zoeller M53 Mighty-Mate#6 of 8Full 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$188.330.3 HP2,040 GPHVertical float - Superior Pump 92341#7 of 8Full 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$140.220.3 HP1,800 GPHVertical float - Little Giant 6-CIA#8 of 8Full 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$213.951/3 HP1,740 GPHDiaphragm
Best Cast Iron Sump Pumps: 1/2 HP and up
- Zoeller M95 Premium#1 of 6Full 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$432.161/2 HP4,000 GPHVertical float - Zoeller M98 Flow-Mate#2 of 6Full 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$328.801/2 HP3,660 GPHVertical float - Red Lion RL-SC50V#3 of 6Full review
For most basements that want 1/2 HP cast iron flow with a vertical float at a fair price.
Amazon $205.77$205.771/2 HP3,000 GPHVertical float - Little Giant BSC50V#4 of 6Full review
For most basements that want strong 1/2 HP cast iron flow at a modest price.
Amazon $180.19$180.191/2 HP3,000 GPHVertical float - Liberty Pumps 287#5 of 6Full 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$323.251/2 HP3,300 GPHVertical float - Little Giant 10EC-CIA-SFS#6 of 6Full review
For a deep basement or long discharge run where flow at 20 ft and beyond matters most.
Amazon $379.99$379.991/2 HP3,420 GPHTethered float