Zoeller M98 review
Zoeller M98 Flow-Mate 1/2 HP Cast Iron Submersible Sump Pump (98-0001)
By Tom Calder
Zoeller rates the M98 at 3,660 GPH at 10 ft, well above the M53's curve. Cast iron, oil-filled, 3-year warranty.
- Best for
- Higher inflow or lift at 1/2 HP
- Skip it if
- Your pit is small and you have not checked it fits a 1/2 HP pump
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- 3,660 GPH at 10 ft (Zoeller brochure)
- Cast iron motor housing, oil-filled
- 3-year limited warranty
Worth knowing
- Maker literature doesn't state cord length or pit size
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Who shouldn't buy this
Don't buy it if your pit is small and you have not checked it fits a 1/2 HP pump.
Key specs
| Horsepower | 1/2 HP |
| Flow at 10 ft (maker) | 3,660 GPH at 10 ft |
| Switch | Automatic float (98-0001) |
| Build | Cast iron |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Basements where an early alert matters
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Standard pit, higher lift or inflow
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Pits where a float might snag