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Zoeller M98 - 1/2 HP Cast Iron Submersible Sump Pump w/ Vertical Float Switch



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Zoeller M98 - 1/2 HP Cast Iron Submersible Sump Pump w/ Vertical Float Switch
Zoeller M98 - 1/2 HP Cast Iron Submersible Sump Pump w/ Vertical Float Switch
Model: 98-0001
Product Q&A
How-To Articles

Recommended Accessories

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Expert Recommended Accessories Selected by Jim, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10





4320 Gallons

Switch Type


Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."
  • ***PLEASE NOTE - 9-Foot Power Cord***
  • Automatic Submersible Cast Iron Sump Pump
  • Offers years of reliable, trouble-free operation
  • Engineered Thermoplastic Base
  • Designed to prevent base corrosion in harsh environments
  • No Sheet Metal Parts To Rust Or Corrode
  • Stainless steel screws, guard, handle, arm and seal assembly
  • Thermally Protected, Permanent Split Capacitor Motor
  • Oil-filled and hermetically sealed to prevent overheating
  • Vertical Float Switch
  • Solid and buoyant polypropylene design
  • Carbon & Ceramic Shaft Seal
  • Assures maximum protection for extended pump life
  • Powder Coated Epoxy Finish
  • Provides a corrosion resistant exterior
  • Clog-Resistant Design
  • No screen to interfere with flowing debris
  • Capable of passing 1/2" diameter solids
  • Industry Leading Quality Control
  • Entire unit is pressure tested after assembly
California residents see
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
For more information go to: www.p65Warnings.ca.gov


specs product image PID-3752
General Information
Product Category
Sump Pump
Base Material
Min Sump Basin Size
18 Inch
120 Volt
Running Amps
Thermal Protection
Power Cord Length
9 Feet
Oil Free Motor
Starting Amps
Housing Material
Cast Iron
Impeller Material
Solids Handling Size
0.5 inch
Handles Solids
Float Type
Vertical Float
GPH @ 0 feet
GPH @ 5 feet
GPH @ 10 feet
GPH @ 15 feet
GPH @ 20 feet
Discharge Port Size
1-1/2 Inch
Check Valve Included
Float On
Float Off
Manual Override
.5 hp
Product Category
Sump Pump
38 Pounds
Consumer Warranty
3 Years
Product Length
10.125 Inches
Product Width
7.875 Inches
Product Height
12.06 Inches
Additional Model Numbers

M98, 98-0001


Zoeller 98-0001 Reviews & Ratings

Product Q&A

Expert avatar photo
Product Questions Answered by Jim, the Sump Pump Expert
Is the Zoeller M95 a new pump?
from Connecticut 
April 07, 2017
What is the difference between the M98 and M95?
from Illinois 
March 31, 2017
Is there a big difference between the M53 and M98 when it comes to noise and cycle rate? I have about 12 feet to go up from my sump pit, so would the additional hp help it not run as much with the initial float kick on at 9?"
Aaron H. 
from North Dakota 
March 21, 2017
What can one expect for your model M53 C to last in terms of years?
Rohn V 
from Ohio 
March 19, 2016
What material is the impeller made of.
Skip H. 
from West Virginia 
August 14, 2015
Jim, could you let me know how much wattage the Zoeller 98 1/2 HP motor uses. As I am considering buying a generator for a few items, including the sump pump?? Thank you, Paul
Paul A 
from New York 
November 25, 2014
My Zoller pump has a threaded female connector on the body. What am I expected to put between the pump body and the bottom clamp of this check valve?
from California 
September 17, 2014
Hi Jim, Can I use the Zoeller M98 as an effluent pump. I have seen it listed as a sump/effluent pump elsewhere. I like the Zoeller brand and am looking to use it as a lift pump for a septic tank. Thanks.
Kevin G. 
from North Carolina 
February 13, 2014
Installing an underground sump pump to drain water coming under the house. Was thinking about ordering the following kit, but I am not sure if the basin is the correct one for a sump pump or if we should switch it to something bigger. Zoeller 1050001 13 HP M53 Remote SinkDrain Pump System w Vertical Float Switch Thank you, Nestor Ho
Nestor H 
from Texas 
October 21, 2013
I have a Zoeller sub pump 1198 horizontal install, I would like to buy another pump,where this one is quite old. What is the model # I should buy. There is no info on tag that is attached the plug wire. I want to say this pump is at least 30 years old. I have never replaced it. Could you please tell me what I would need to purchase. I don not have any owners manuel on product all I could find was 1198 horizontal Install on pump. Can you please assist me. Thanks, Rebekah
Rebekah T 
from Massachusetts 
June 14, 2013
I live on a small man made lake and have a walk out basement. Over the years the water table of the lake has risen to the point that the piers of my deck, approximately 100 feet from the water, have raised my deck about 4 inches. I dug a dry well near the house 2 feet deep. This dry well is constantly filled with water to within 6 inches of ground level. The dry well has underground drain tile running out to near the lake. I want to install a sump pump in the well to extract the water and hopefully keep my deck fro rising. Will the M98 be a good pump for this application or should I be looking at a 3/4 or even 1 HP pump. I expect this pump will run quite often maybe even close to continuously. Thanks for your help. Kurt
Kurt K 
from Illinois 
April 25, 2013
I want to replace my old 1/3 hp Zoeller with a newer 1/2 M98. Our pump has worked well but we got hit with a lot of water in the Sept 2011 flood (Lancaster PA area). The check valve double checked so I don't know if the pump would have handled that volume. The pump is old, has a 1 & 1/4 line out. Do you think replacement with a 1/2 hp upgrade would be ok? Fits in the well the same but would handle a bit more water per hour. Thanks
Bob Spender 
from Pennsylvania 
October 23, 2012
I would like to know how many watts a 1/3 or 1/2 hp sump pump has, because i was think of buying a portable generator in case the power goes off.
Tom B. 
from New York 
September 03, 2012
Jim, I've learned a lot reading these Q&As and the reveiws. A few questions for you - hopefully this isn't overboard, I'm rather new to having a basement... 1. My current sump pump is old and I'd like to proactively replace it. Based on where I live, and how active he heard my sump pump going off even after no rainfall for a while, a plumber/family friend recommended getting 2 high velocity pumps at least 1/3 HP (with 2" discharge). Even though this only has 1.5" discharge, based on reviews I'm sold on either this Zoeller or your Storm Pro 'Best'. I've also heard of some friends having someone out to 'install a battery backup' on their existing pump (apparently not a separate system including another pump). Is there a way to add a battery backup system on to these pumps, since I want those pumps but the security of a battery backup? Does this approach of 2 of the same pumps make sense to you, or should I be looking to get one of these and a battery backup system? 2. How much time do the battery backups generally give you? Thanks! 3.
from New Jersey 
August 28, 2012
what pump do you recomend for a 1250 gal septic system
from New York 
July 29, 2012
I don't know which model sump pump to purchase or which model is appropriate for my home. How do I go about doing that?
from Illinois 
May 20, 2012
I am torn between which Zoeller pump would be best for my application. My basement is 104' and currently takes in approximately 3" of water when there is a hard rain. The water is only on one side of the basement and never comes up on the other. Would you recommend a 1/3 hp or 1/2?
from New Jersey 
January 15, 2012
I am considering buying a Zoeller m98. I am going to have it on a dedicated circuit my question is how many amps does the circuit breaker and circuit need to be. I see that the running amperage is 9.4 but I am concerned about having a circuit that will carry the starting load.
Peter Warren 
from New York 
December 30, 2011
can i adjust the float on a m98 pump? I cant get it any deeper, but need it to kick on sooner...
from Washington 
December 29, 2011
Still evaluating: Question on Zoeller M98: Why does Motor Amps read "9.4 / 29.2"? What does the 29.2 mean?
from Michigan 
August 07, 2011
do I need to drill a vent hole in the discharge pipe when installing Zoeller M98 in my basement for dewatering?
from New Jersey 
June 04, 2011
I have this pump: Zoeller M98 - 1/2 HP Cast Iron Submersible Sump Pump w/ Vertical Float Switch, I am on my 3 pump in 6 years. All the same pump. Each time the pump gets stuck in the on positon and will not shut off. Can I replace the switch? I just got a new one and thought I could fix the swith on the old one and keep for a back up. Also, isn't is strange that this keeps happening? Our pump runs quite a bit in the spring and in winter is we get rain or a big snow melt. I keep getting the same pump from my home builder who runs a plumbing supply company and get a good price. Should I consider a different pump?
Ryan Schmitz 
from Illinois 
April 22, 2011
I want to replace our pedestal pump, which runs a lot due to high water table, and the zoeller M98 looks good. We have a rectangular sump hole in the corner of the basement, about 18 inches deep (est). What accessories would I need with the pump? All the covers I see are round, is there a rectangular cover available, and where does the check value go? Thanks!
Jim Shear 
from New York 
April 03, 2011
How can i get the arm that the float rides on the m53?
Steven Ramsey 
from Indiana 
February 12, 2011
Can you raise the vertical float switch to accommodate a higher water level in the sump pump pit on this Zoeller submersible sump pump, if so, how?
from Illinois 
February 07, 2011
My pump keeps running, is it the switch or the pump?
Dennis Lainson 
from Iowa 
February 05, 2011
I am considering ordering a back-up for my thirty-year-old Sears Craftsman 1/2 hp submersible. So far this unit (Zeoller M98) looks to be the best fit in terms of size, capacity and quality. Can I reuse the Craftsman solid state controller? The reason why is, I like that I can precisely set the cycle on/off level, using these little probes that run to an A/C line controller. I'd re-buy that exact same Craftsman unit again, except they don't make it anymore.
Steve Manseau 
from Massachusetts 
January 05, 2011
What material is the impeller made of?
Steven Manseau 
from Massachusetts 
January 05, 2011
What is a Vertical Float Switch?
from Illinois 
December 29, 2010

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Zoeller M98 - 1/2 HP Cast Iron Submersible Sump Pump w/ Vertical Float Switch
Zoeller 98-0001
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