Zoeller M63 Submersible Sump Pump 3/10 HP
- Horsepower: 0.3 hp
- Flow Rate: 43 gpm
- Power Source: Corded Electric
- Material Type: Cast Iron
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An automatic submersible sump pump rated at 3/10 HP with a cast iron housing, a float operated switch and a 115V LED lit power plug, built for basement water removal.
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ASIN: B01N43YTWOModel: M63Category: Sump Pumps
Overview
The Zoeller M63 is an automatic submersible sump pump built for basement water removal, rated at 3/10 HP with a cast iron housing, a float operated switch, and a 115V LED lit power plug.
It runs on an oil filled motor housed in cast iron for heat dissipation, with a non clogging vortex impeller that also handles solids. Zoeller backs it with a 5 year limited warranty and factory tests every unit submerged in water before it ships.
- 3/10 HP oil filled motor in a cast iron housing
- Snap action float switch for automatic operation
- Non clogging cast iron vortex impeller
- 9 foot cord with LED power indicator plug
Who it's for
Suited to homeowners replacing an aging primary sump pump in a basement or crawlspace that sees regular water intrusion. Less suited to anyone who wants a battery backup included, since this listing is the pump only.
Pros and cons
- Runs noticeably quieter than the pumps it replaced
- Cast iron impeller and housing feel solidly built
- LED plug shows power status at a glance
- 5 year warranty backs the cast iron build
- Some owners now see 5 to 7 year lifespans instead of the 15 to 20 years older Zoeller pumps gave
- One buyer received units with shipping damage from thin, unpadded boxes
Performance notes
The float switch uses a snap action design rated for repeated cycles, triggering the pump automatically as water rises. The vortex impeller is shaped to pass small solids without clogging, and the oil filled cast iron motor housing sheds heat during long pumping runs, which several owners connect to how quietly it runs compared to the units it replaced.
Where it stands among sump pumps
- #5 most-searched brand and model of the 18 sump pumps lines we track (by search demand, not sales).
From the specs of the 38 sump pumps we list; not a test result.
Specifications
| Brand | Zoeller |
|---|---|
| Model | M63 |
| Dimensions & fit | |
| Item Weight | 10 pounds |
| Item Dimensions L X W X H | 10.2 × 7.8 × 10.2 inches |
| Capacity & performance | |
| Flow Rate | 43 gpmlower than 61% of 24 sump pumps |
| Power & efficiency | |
| Horsepower | 0.3 hp |
| Power Source | Corded Electric |
| Voltage | 115 volts |
| Construction & materials | |
| Material Type | Cast Iron |
| Color | Color |
| Included components | |
| Unit Count | 1 |
| Included Components | Product Only |
| Other details | |
| Number Of Items | 1 |
| Product Style | Premium Series |
| Item Type Name | Zoeller M63 Premium Series 5 Year Warranty Mighty-Mate Submersible Sump Pump, 1/3 Hp |
| Item Highlight | LED Power Plug - High Flow - Vortex Impeller Stainless Steel Hardware - Factory Tested And Float Operated |
| Eu Spare Part Availability Duration | 5 years |
Closest rivals on specs
Liberty Pumps 257 Submersible Sump Pump- Flow Rate 43 vs 50 gpm (-14%)
Little Giant 506065 Drainosaur Jr Sump Pump Basin System- Item Weight 10 vs 13.45 pounds (-26%)
Little Giant 506158 Cast Iron Submersible Sump Pump 1/3 HP- Item Weight 10 vs 17 pounds (-41%)
Frequently asked questions
Does the Zoeller M63 include a battery backup?
No, the M63 is a primary pump only; it does not include a backup pump or battery.
What warranty does the Zoeller M63 carry?
It carries a 5 year limited warranty, backed by 100 percent factory testing where each pump is submerged in water for quality control.