Description
May be used in those states where codes do not restrict solids size in effluent systems.
Features:
- Float operated, submersible (NEMA 6) 2-pole mechanical switch
- Durable cast construction, ASTM Class 25 cast iron, switch case and pump housing
- Cast iron base on models 267 and 268
- Engineered plastic base on model 266
- Non-Clogging Vortex Impeller Design. Engineered plastic impeller with metal inserts on models 266, 267 & 268 (1 PH).
- Not affected by materials normally found in drainage and sewage pumps
- Stainless steel screws, bolts, handle, guard and arm and seal assembly
- Neoprene square ring & gasket
- Oil-filled, hermetically sealed motor
- Oil lubricated bearings
- Carbon and ceramic shaft seal
- Passes 2" spherical solids
- 2" NPT discharge
- On point: 12" (automatic units); Off point: 4" (automatic units)
- Corrosion resistant powder coated epoxy finish
- Completely submersible
- Watertight and dust tight
- Automatic reset thermal overload protection (1 Phase only)
- Reserve powered design. For unusual conditions a reserve safety factor is engineered into the design of every Zoeller pump.
Specs
| Type: |
Automatic |
|---|---|
| Application: |
Sewage Sewage Waste Transfer Effluent |
| Material: |
Cast Iron |
| Horse Power: |
1/2 |
| Voltage: |
115V |
| Amperage: |
10.4 |
| Phase: |
1 |
| RPM: |
1725 |
| Cord Length: |
10' |
| Cord Type: |
UL Listed, 3-Wire Neoprene Cord & Plug |
| Height: |
14-9/32" |
| Features: |
w/ Plastic Impeller |
| Flow at 5 FT Head: |
128 GPM |
| Flow at 10 FT Head: |
89 GPM |
| Flow at 15 FT Head: |
50 GPM |
| Approvals: |
UL/CSA |
| Weight (lbs): |
47.5 lbs |
| Discharge: |
2" |
| Solids Size: |
2" |
| Shutoff Head (ft.): |
21.5' |
Product Details
- Brand ZOELLER Manufacturer Part Number M267
- HP 1/2
- Rated Voltage 115V AC
- Phase - Pumps 1
- Amps 10.40
- Motor Type Hermetically-Sealed; Oil-Filled
- Body Material Cast Iron
- Impeller Material Thermoplastic
- Shaft Seal Material - Pumps Carbon; Ceramic
- Switch Actuation Vertical Float
- Switch Electrical Connection Integral
- On Point 12 in
- Off Point 5 in
- Flow Rate @ 10 Ft. of Head 85 gpm
- Flow Rate @ 15 Ft. of Head 45 gpm
- Flow Rate @ 20 Ft. of Head 10 gpm
- Max. Diameter Solids 2 in
- Min. Sump Pit Dia. 18 in
- Body Dia. 13-1/16 in
- Overall Height 14-9/32 in
- Cord Length 10 ft
- Discharge 2 in FNPT
- Max. Liquid Temp. 130 °F
- Max. Head 21.5 ft
- Duty Cycle Continuous
- Thermal Protection Yes
- RPM 1,725 RPM
- Agency Compliance CSA Certified; UL Listed
- Manufacturers Warranty Length 3 yr
- UNSPSC 40151517
- Country of Origin USA (subject to change)
Understanding the M267's Higher-Capacity Role
M264 vs. M267: Sizing Up
| M264 "Waste-Mate" (4/10 HP) | M267 (1/2 HP) | |
|---|---|---|
| Amps | 9.4 | 10.4 |
| Flow @ 10 ft head | — | 85-89 GPM |
| Flow @ 15 ft head | — | 45-50 GPM |
| Shutoff head | — | 21.5 ft |
| Solids handling | 2" | 2" |
| Duty cycle | Standard | Continuous |
| Warranty | 3 years | 3 years |
The M267's higher horsepower and continuous duty rating make it the better choice when your ejector system needs to push wastewater a greater vertical distance to reach the sewer connection, or when demand is higher (multiple bathrooms, higher fixture count) than a standard single-bathroom basement setup.
Why "Head" Matters More Than You'd Expect
The flow rate figures — 89 GPM at 10 ft of head, dropping to 50 GPM at 15 ft — illustrate a core principle of ejector pump sizing: the higher the pump has to lift wastewater, the less volume it can move per minute. This is why simply picking "the bigger pump" isn't always right — what matters is matching the pump's performance curve to your specific vertical lift distance and expected flow demand. A pump undersized for your home's head requirements will struggle and wear out faster; one that's oversized wastes money without meaningful benefit.
Continuous Duty Rating: A Meaningful Distinction
The M267 is explicitly rated for continuous duty cycle operation, meaning the motor is engineered to handle sustained running without the rest periods some pumps require to avoid overheating. This matters for higher-demand ejector applications — a busy basement bathroom and laundry room combined, for instance — where the pump may need to run more frequently than a typical single-fixture setup.
Minimum Sump Pit Diameter: A Real Installation Constraint
The listed 18" minimum sump pit diameter is a genuine constraint to plan around — the basin needs sufficient interior clearance for the pump, float switch, and proper water circulation. If you're retrofitting an ejector system into an existing basement, confirming adequate space for an 18"+ basin is one of the first things to check before ordering equipment.
State Code Variation: Solids Size Restrictions
The product description notes it "may be used in those states where codes do not restrict solids size in effluent systems" — a useful reminder that plumbing code requirements for ejector pumps vary by jurisdiction. Some local codes have specific solids-passing requirements or restrictions that go beyond the pump's mechanical capability. Our technicians stay current on Illinois and local Chicago-area suburb code requirements to ensure your installation is fully compliant.
Shared Durability Features
Like other Zoeller sewage models, the M267 includes:
- ASTM Class 25 cast iron construction for the switch case and pump housing
- Non-clogging vortex impeller with metal inserts for durability
- Oil-filled, hermetically sealed motor with automatic reset thermal overload protection
- Carbon and ceramic shaft seal for long-term reliability
- UL Listed and CSA Certified, confirming independent safety and performance verification
Is the M267 Right for Your Application?
Consider the M267 over the M264 if your ejector system needs to handle:
- A greater vertical lift distance to reach the sewer connection
- Multiple fixtures or higher-than-typical flow demand
- Continuous or frequent operation, such as a heavily used basement bathroom
Professional Installation and Sizing Matters
Given the head/flow tradeoffs and minimum pit size requirements involved, professional sizing assessment is essential before installation. Our licensed plumbers will:
- Calculate your system's actual vertical lift (head) requirement
- Confirm sump pit sizing meets the 18" minimum diameter requirement
- Verify code compliance for your specific municipality
- Install with proper venting, check valve, and code-compliant electrical connection
- Test performance against your home's real fixture demand
Frequently Asked Questions
How do I know if I need the M264 or the M267?
It depends on your vertical lift distance and fixture demand; our technicians calculate your system's specific head requirement to recommend the right pump rather than guessing based on horsepower alone.
What happens if my sump pit is smaller than 18"?
The basin may need to be replaced or resized to accommodate proper pump operation and clearance; our plumbers can assess your existing pit during a consultation.
Does "continuous duty" mean the pump runs all the time?
No — it means the motor is engineered to handle sustained operation without needing rest periods to avoid overheating, which is valuable for higher-demand applications, not that the pump runs continuously under normal use.
Heavy-Duty 1/2 HP Power: Premium High-Head Wastewater & Sewage Ejection for Basement Bathrooms
The Zoeller Waste-Flow Model 267 (1/2 HP) Sewage Ejector Pump is engineered for demanding residential and commercial applications requiring higher lifting power and maximum volume to evacuate raw sewage, effluent, and wastewater from below-grade basement bathrooms. When your basement plumbing sits far below the main municipal sewer line or requires a long vertical discharge run, standard 0.4 HP pumps may struggle. The Zoeller M267 solves this with a robust 1/2 HP high-torque motor, heavy-duty cast iron construction, and a non-clogging vortex impeller capable of passing full 2-inch spherical solids. Whether you are adding a multi-fixture basement bathroom, laundry room, or need an emergency sewage pump replacement, our certified plumbing specialists deliver prompt, professional results. Call our expert team today at (224) 754-1984 for fast 24/7 emergency service, basin cleaning, or professional ejector pump installation:
High-Capacity 1/2 HP Motor: Delivers superior torque and pumping power to handle high-head vertical discharge plumbing and heavy household waste loads.
Rugged Cast Iron Construction: Solid cast iron motor housing, pump base, and switch case dissipate heat rapidly and provide lifetime underground durability.
Superior 2-Inch Solids Handling: Engineered with a vortex impeller capable of passing up to 2-inch spherical solids and fibrous materials without clogging.
Hermetically Sealed Design: Oil-filled, permanently lubricated motor protected against thermal overload and moisture intrusion for ultimate peace of mind.
Reliable Mechanical Float Switch: Features a dependable snap-action float switch designed for smooth, trouble-free automatic cycling inside sealed sewage pits.
Zoeller M267 Technical Specifications & Performance
Engineered for professional installation in demanding residential sewage basins and effluent pits:
Technical Parameter Feature & Specification Details Operational Advantage Manufacturer & Model Zoeller Waste-Flow M267 Heavy-Duty Submersible Sewage Pump Premium high-capacity residential cast iron sewage ejector pump. Motor Horsepower 1/2 HP Permanent Split Capacitor (PSC) motor Delivers greater vertical lifting power and higher flow rates. Discharge Size & Flow 2" NPT Discharge (Up to 140 GPM peak capacity) Rapid wastewater evacuation matching demanding home sewage requirements. Body Material Heavy-duty Cast Iron motor housing, pump housing, and cover Provides maximum structural weight and corrosion resistance underground. Solids Handling Capable of passing 2-inch spherical solids Prevents clogging from toilet paper, waste, and pit debris. Electrical Requirements 115V / 60 Hz (Standard 3-prong grounded plug) Easy plug-and-play integration into dedicated basement basin circuits.
Key Benefits of Upgrading to a Zoeller M267 Sewage Pump
Integrating a Zoeller M267 1/2 HP cast iron sewage ejector pump into your basement plumbing infrastructure delivers immediate practical protection rewards:
Superior High-Head Performance: If your sewage discharge line travels high up a basement wall or runs a long distance out to the street, the 1/2 HP motor maintains strong, reliable flow where smaller pumps lose pressure.
Maximum Backflow Protection: Safeguards your home against catastrophic basement sewage backups, protecting drywall, flooring, and living spaces.
Exceptional Long-Term Durability: Built to operate reliably for 10 to 15+ years with normal usage, drastically outperforming lightweight plastic alternatives.
Odor-Free Basement Living: Installed inside a sealed, gas-tight sewage basin with proper venting, operating completely silently and odor-free beneath your floor.
Our Step-by-Step Zoeller M267 Installation Process
Basin Inspection & Safety Prep: Safely shutting off power, inspecting the sealed sewage basin, and establishing sanitary containment protocols.
Old Pump Extraction & Cleanup: Removing the failed pump, draining legacy discharge piping, and thoroughly cleaning accumulated sludge and debris from the pit.
Zoeller M267 Placement & Leveling: Lowering the heavy cast iron M267 into the basin, ensuring the float switch moves freely without hitting basin walls or piping.
Discharge Piping & Full-Flow Check Valve Hookup: Connecting 2-inch PVC discharge piping alongside a heavy-duty sewage check valve to prevent water hammer and backflow.
System Commissioning & Gas-Tight Sealing: Testing electrical float activation, verifying pumping volume, and securing the sealed basin cover to guarantee zero sewer gas leaks.
Frequently Asked Questions: Zoeller M267 Sewage Pump
Q: Do I need a 1/2 HP pump like the Zoeller M267, or is a 0.4 HP pump enough?
A: If your basement bathroom is located far from the main sewer line, if your discharge pipe runs high up a basement wall, or if your household has heavy daily water usage, the Zoeller M267 (1/2 HP) provides the necessary extra lifting power and volume to ensure trouble-free drainage.
Q: What is the average lifespan of a Zoeller M267 sewage pump?
A: With proper professional installation and normal residential usage, a Zoeller M267 cast iron sewage pump typically lasts between 10 to 15 years.
Q: What size solids can the Zoeller M267 pass?
A: The Zoeller M267 features a non-clogging vortex impeller designed to pass spherical solids and waste up to 2 inches in diameter without jamming.
Q: What should I do if my sewage ejector pump is running constantly or tripping the circuit breaker?
A: Continuous running or a tripped breaker usually indicates a stuck float switch, a jammed impeller from non-flushable wipes or sanitary items, or a failing motor winding. Unplug the unit immediately if safe and call our 24/7 emergency plumbing team to resolve the issue before a backup occurs.
Founded in the family basement in 1939, Zoeller Pump Company is one of the oldest family-owned water pump manufacturers in North America. Headquartered in Louisville, KY, we proudly excel with fourth-generation leadership and an expanding workforce.
Over the past seven decades, Zoeller Pump Company has established itself as a dependable leader in the wastewater industry. Through continuous research and development, we are always improving our products and processes to provide the highest possible quality to our loyal customers and end users.
This dependability is backed by a family commitment to add value for our customers and provide genuine support before, during, and after a sal
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