Zoeller M98 Flow-Mate

Last updated: October 31, 2026

Zoeller M98 Flow-Mate
3.1/5#7 of 17 in 1/2 HP and up sump pumps
3.1

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.

  • 1/2 HPMotor
  • 3,660 GPHFlow at 10 ft
  • Vertical floatSwitch
  • 3 yearsWarranty
Check price at Amazon$328.80

Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • About 3,700 gallons an hour at 10 ft keeps up with a pit that fills fast in heavy rain
  • Heavy cast iron motor housing runs cool through long storms
  • Mechanical float on the pump, so no cord to tangle in the pit
  • Still pumps 25 GPM at 20 ft, enough for a deep basement
Cons
  • At 36 lb it is heavy to lift out of the pit for service
  • Its 9-1/2 in turn on level needs a deeper pit than most 1/3 HP pumps
  • Only a 3 year warranty for the price

How it scores

The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Model number98-0001
Pumping
Motor1/2 HP
TypeSubmersible
Flow at 10 ft3,660 GPH
Max lift23 ft
Discharge1.5 in
Running current9.4 A
Switch and build
SwitchVertical float
Cast iron housingYes
Alarm or monitoringNo
Wi-FiNo
Cord length9 ft
Weight36 lb
Warranty3 years

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