Zoeller M98 is an automatic submersible sump pump. It features a permanent split capacitor (PSC) motor of 1/2 HP capacity. It is a float-operated pump available in automatic and nonautomatic operating modes. It is a 1-PH dual voltage pump that can run off either 115 or 230 VAC at 60 Hz. The motor revolves at 1725 RPM. The maximum flow rate of the pump is 72 GPM (273 LPM) at 5 feet Total Dynamic Head (TDH). The pump shuts off at 23 feet TDH. It is a USA-made pump famous for reliable performance and longevity. The use of cast iron and stainless steel in construction makes the pump highly durable. This article is about the Zoeller M98 sump pump review to articulate various technical aspects of the pump in detail.
Key Features of Zoeller M98 Sump Pump ½ HP
Permanent Split Capacitor (PSC) Motor
The motor of the Zoeller M98 pump is a permanent split capacitor (PSC) type. The motor power is 1/2 HP with a rotational speed of 1725 revolutions per minute (RPM). It is a single phase dual voltage motor that is usable with both 120 and 230 VAC at 60 Hz frequency. The motor current is 4.7 - 9.4 Amps. The motor's insulation is class B type. It is provided with an auto reset function to protect it against thermal overload.
Zoeller M98 Automatic Submersible Sump Pump
Automatic Float Switch
The automatic M98 pump features an integrated float switch. It is a snap-action, 2-pole, mechanical float switch. So, it is a float-operated pump. The float material is solid, buoyant polypropylene. A solid float guarantees that water will never fill it. If water fills the float, the float switch will malfunction. A float guard shields the float.
Elements of the Zoeller pump M98 are made with heavy-duty materials. Also, the pump has a high heat dissipation rate from the motor. Overall, the pump's design and construction allow it an extended lifespan.
- The pump housing, motor, switch case, and cap are all cast iron.
- The switch arm, float guard, handle, seal assembly, and screws are stainless steel.
- The stainless steel deters rusting.
- The upper and lower bearings are oil-fed cast iron.
- The pump base is engineered thermoplastic.
- The impeller is engineered plastic.
- The motor shaft is AISI 1215 cold roll steel.
- Mechanical shaft seals are carbon and ceramic.
- The gasket is neoprene.
- Stainless steel hardware.
- There are no sheet metal parts that suffer rusting and corrosion.
- Cast iron class 25-30 25000# tensile strength castings.
- The powder coated epoxy finish resists corrosion.
The M98 Zoeller sump pump can discharge 72 GPM (273 LPM) at 5 feet height and 25 GPM (95 LPM) at 20 feet height. Maximum discharge height of this unit is 23 feet (7 m). The float switch automatically turns the pump ON/OFF. Automatic ON/OFF heights are 9-1/2″ (24 cm) and 3" (8 cm). 1/2 inch (12 mm) spherical solids can easily pass through the pump. Maximum operating temperature of the M98 Flow-Mate pump is 54° C (130° F). This pump can be automatic or non-automatic.
Watertight Motor Sealing
The motor of the M98 Zoeller pump is oil-filled and hermetically sealed. The Oil-filled motor placing provides proper cooling to it. There is a neoprene gasket between the motor and pump housing. The gasket ensures watertight and dust-tight sealing around the motor to prevent water from leaking into it. The mechanical seals of the motor shaft are carbon and ceramic seals.
The impeller of the Zoeller M98 1/2 HP pump is non-clogging vortex type. The impeller's construction material is engineered plastic which ensures its hardness. The pump is capable of handling 12 mm (1/2″) spherical solids. The pump doesn't have screens, so it will not clog.
Zoeller M98 System Applications
The Zoeller M98 1/2 HP submersible sump pump covers a wide of applications. Its applications include groundwater removal, effluent transfer, sump pit, residential dewatering, Septic Tank with Effluent Pump (STEP) system, flood prevention, light commercial dewatering, low pressure pipe (LPP) septic system, septic tank dewatering, new sump, and many others.
The Zoeller M98 discharge size is 1-1/2" NPT. It comes with UL listed power cord. Power cord length for the automatic pump is 9 feet (3 m), and for the non-automatic pump, it is 15 feet (5 m). Additionally, 25 feet (8 m) 35 feet (11 m) cords are available. Also, 50 feet (15 m) power cords are available only for 230 V systems.
Warranty & Certification
After assembly, the M98 Zoeller pump is fully pressure tested, submerged, and operated to ensure quality and long term integrity without trouble. The Zoeller M98 pump warranty is 3 years. This pump carries certifications from the Sump and Sewage Pumps Manufacturers Association (SSPMA), Canadian Standards Association (CSA), and UL. Also, Powder Coated Tough (PCT) magazine approves this pump for its powder coated epoxy finish.
Zoeller M98 Automatic Submersible Sump Pump
Video: Sump Pump Air Lock Prevention Tips
FAQs About Zoeller M98 Sump Pump
Q: Why the 1/2 HP Zoeller M98 pump doesn’t turn off?
Several issues may prevent the flow-mate M98 pump from shutting off. Following is the summary of possible causes.
- Float rod or float fixated to sump wall or other.
- Float assembly blocked by debris.
- Switch adjustment lost.
- Faulty or damaged switch.
To sum up, we can say that Zoeller M98 is an efficient, worthwhile, dependable, noiseless, and heavy-duty sum pump. The Zoeller M98 sump pump review aimed to present a fair assessment of the M98 Zoeller pump. We assume our Zoeller M98 review has given you the necessary details to make a correct decision about buying this great pump. Best of luck!