What Each One Moves, and the Best Ejector Pumps to Buy
5 picks compared · prices, ratings and stock checked October 11, 2026
Our Top Pick
For a basement bathroom, the Superior Pump 93015-U: a cast iron 1/2 HP sewage pump that states the 2-inch solids rating the job needs. If there is no basin yet, the Superior Pump 93020 system adds the sealed basin, bolted cover and check valve.
4.6 on Amazon · 231 ratings
Quick answer
A sump pump moves groundwater out of an open pit, while a sewage ejector pump lifts waste from a below-grade toilet, shower or laundry up to the sewer line from a sealed, vented basin, and it has to pass solids, commonly 2 inches across. They are not interchangeable. For the ejector job, the Superior Pump 93015-U is the pick, rated 4.6 stars across 231 Amazon ratings, with a stated 2-inch solids rating, a 2-inch discharge and a tethered float switch. Installing an ejector is plumber work and usually needs a permit.
Every pick below is currently stocked — ratings and stock read from Amazon on 11 October 2026.
Best for: Replacing or installing the pump in a basement bathroom basin, where a 2-inch solids rating is the requirement
Listing verified 13 Oct 2026
Best for: A buyer who wants the most fully described motor build and will confirm the solids rating against the spec sheet
Listing verified 13 Oct 2026
Best for: A new basement bathroom or laundry with no basin yet, where you want the parts matched to each other
Listing verified 13 Oct 2026
Best for: A basin that sits well below the sewer connection or feeds a long discharge run, where lift is the limit
Listing verified 13 Oct 2026
Best for: The separate sump pit that keeps groundwater out of the basement, and a reference point for the comparison
Listing verified 13 Oct 2026
How this page was made: we compare the current Amazon listings, the makers' published specs and what verified buyers report, then rank by fit for the job. Ratings, review counts and stock are read from Amazon and dated. We earn a commission on purchases through our links; it does not change the order. Reviewed by Marcus Reed, IICRC-certified Water Restoration Technician.
Full Reviews
Each pick in detail: what the listing states, what buyers report, and where it falls short.
Check price
on Amazon ↗
Listing verified 13 Oct 2026
See it on Amazon ↗Best Overall
Quick Verdict
A cast iron 1/2 HP sewage pump with stated 2-inch solids handling and a tethered float, the specs a basement bathroom needs.
Key Specs
Motor
1/2 HP
Solids handling (stated)
2-inch spherical solids
Discharge
2 inch
Switch
Tethered float switch with piggyback plug
Impeller
Non-clogging vortex
Construction
Cast iron
Pros
Cons
Suited to
Replacing or installing the pump in a basement bathroom basin, where a 2-inch solids rating is the requirement
Our take
This ranks first because it pairs one of the strongest buyer records among sewage pumps with a listing that states what the job requires. A pump serving a toilet has to pass solids, and 2 inches is the common residential figure; this one states 2-inch spherical solids and a 2-inch discharge. The tethered float swings through a wide arc, so each cycle empties a good share of the basin, which suits a basin that fills in surges every time a toilet is flushed. What the listing leaves out is the flow at your lift. Measure the vertical distance from the basin to where the discharge pipe meets the sewer line, and check it against Superior's published curve.
Affiliate link — commission at no extra cost to you
Compare elsewhere
These open a search for this model. We quote prices only where we can verify them — Amazon, Sylvane and eBay.
Check price
on Amazon ↗
Listing verified 13 Oct 2026
See it on Amazon ↗Best Motor Build
Quick Verdict
The best-described motor here, oil-filled with ball bearings and a stainless rotor shaft; confirm the solids rating on the spec sheet.
Key Specs
Motor
1/2 HP, oil-filled, thermally protected
Discharge
2 inch
Bearings
Permanently lubricated ball bearings
Construction
Heavy cast iron; stainless steel fasteners and rotor shaft
Cord
Quick-connect, 10 ft
Operation
Automatic (switch type not stated on the listing)
Pros
Cons
Suited to
A buyer who wants the most fully described motor build and will confirm the solids rating against the spec sheet
Our take
On buyer evidence this is level with the Superior 93015-U, and its listing describes the motor more thoroughly than any other here: oil-filled, thermally protected, with permanently lubricated ball bearings and a stainless steel rotor shaft. Those details decide how long a sewage pump lasts, because it starts and stops several times a day for years. It ranks second only because the listing skips the two specifications this page is about, the solids it passes and the type of float switch. It is sold as an automatic sewage pump with a 2-inch discharge; check Liberty's published data for the solids figure rather than assuming it.
Affiliate link — commission at no extra cost to you
Compare elsewhere
Check price
on Amazon ↗
Listing verified 13 Oct 2026
See it on Amazon ↗Best Complete System
Quick Verdict
Pump, sealed 30-gallon basin, bolted cover and check valve in one listing, with a stated 4,800 GPH and 25 ft lift.
Key Specs
Pump
1/2 HP cast iron, 2 in. discharge, 2 in. solids handling, non-clogging vortex impeller
Flow and lift (stated)
Up to 4,800 GPH; up to 25 vertical ft
Switch
Tethered float in the bullets; the title says vertical float
Basin
18 x 30 in., 30 gallon structural foam, built-in torque stops
Inlet
4 in. rubber inlet hub for DWV schedule 40/80 pipe
Cover
8-bolt structural foam cover, airtight reusable PVC seal, 2 in. discharge and vent connections
Pros
Cons
Suited to
A new basement bathroom or laundry with no basin yet, where you want the parts matched to each other
Our take
If you are adding a bathroom below the sewer line rather than replacing a pump, the basin, cover, vent and check valve matter as much as the pump itself. This listing includes all of them: an 18 by 30 inch, 30-gallon basin, a 4-inch inlet hub for standard drain pipe, an 8-bolt cover with an airtight seal, discharge and vent connections, and a check valve. The sealed cover and vent are what keep sewer gas out of the basement, and they are the part most often skipped when someone improvises with an open sump pit. The one inconsistency to clear up before ordering is the float switch, listed as vertical in the title and tethered in the bullets.
Affiliate link — commission at no extra cost to you
Compare elsewhere
Check price
on Amazon ↗
Listing verified 13 Oct 2026
See it on Amazon ↗Highest Stated Lift
Quick Verdict
The most lift stated here, 29 ft, with 2-inch solids and dry-run protection, for long or high discharge runs.
Key Specs
Motor
3/4 HP, oil-filled split capacitor
Flow and lift (stated)
Up to 6,400 GPH; up to 29 ft vertical
Solids handling (stated)
2-inch diameter
Discharge
2 in. NPT
Switch
Adjustable mechanical float; 10 ft cords with piggyback plug
Protection
Thermal overload; shuts off when running dry
Pros
Cons
Suited to
A basin that sits well below the sewer connection or feeds a long discharge run, where lift is the limit
Our take
Lift is the specification that rules a pump in or out when the basin sits far below the sewer connection, and this listing gives the highest figure here, up to 29 feet vertically, from an oil-filled 3/4 HP motor. It also states 2-inch solids, a 2-inch NPT discharge, thermal protection and a dry-run shut-off. Read the 6,400 GPH the way every pump flow figure should be read: as output near zero lift that falls as the height rises. Where the sewer line is only a few feet above the basin, the extra horsepower buys little. The brand's history is shorter than Liberty's or Superior's, and the two-year warranty is the term to weigh.
Affiliate link — commission at no extra cost to you
Compare elsewhere
Check price
on Amazon ↗
Listing verified 13 Oct 2026
See it on Amazon ↗Best Sump Pump (Groundwater Only)
Quick Verdict
A well-built 3/4 HP sump pump for groundwater, included for contrast: right for a sump pit, wrong for sewage.
Key Specs
Use
Groundwater in a sump pit; not a sewage pump
Motor
3/4 HP
Flow (stated)
Up to 5,490 GPH
Switch
Integrated vertical float
Intake
Top suction, anti-airlock; no weep hole needed
Construction
Cast iron and stainless steel
Pros
Cons
Suited to
The separate sump pit that keeps groundwater out of the basement, and a reference point for the comparison
Our take
This is the sump pump half of the comparison, chosen because it carries the largest buyer record of any pump here and a clear statement of what a sump pump is for: removing groundwater from a pit during storms. Everything about it suits that job and not the other one. It draws water in from the top so pit silt stays put, uses a vertical float made for a narrow open pit, and states no solids rating at all. Put it in a sealed sewage basin and it would face waste it is not built to pass. If your basement has both a sump pit and a bathroom below the sewer line, you need both pumps.
Affiliate link — commission at no extra cost to you
Compare elsewhere
What to know before you buy.
A sump pump sits in an open pit in the basement floor and removes groundwater that collects there, usually through drain tile around the foundation. That water is relatively clean, and it is discharged outside, away from the house; many cities prohibit sending it into the sanitary sewer. A sewage ejector pump serves fixtures below the sewer line, such as a basement toilet, shower or washer, and lifts their waste up to the main drain. It must pass solids, commonly 2 inches across. An effluent pump sits between the two: it handles gray water, from a laundry or a septic system's treated effluent, with small solids, typically up to about 3/4 inch. A grinder pump goes further than an ejector by cutting solids up before pumping, which suits long runs and pressurized sewer mains.
A sump pump in a sewage basin will clog. Its impeller and intake are built for water with grit in it, not toilet waste, and a wad of paper or a wipe can stop it, which sends sewage back up into the basement fixtures. It is also against plumbing code in most places, because a sewage basin must be a sealed, gas-tight tank with a vent, and the pump in it must be rated for sewage. The reverse mistake is less dangerous but still wrong. A sewage pump can move clear groundwater, but it is a costly way to do it, and a sump pit should never be tied into the sewer line without local approval. Each pit gets its own pump.
For a basin that takes a toilet, the specification that matters most is the size of solid the pump can pass. Residential sewage ejector pumps commonly pass 2-inch spherical solids through a 2-inch discharge, and local plumbing code sets the minimum where you live. Three listings on this page state 2-inch solids: the Superior 93015-U, the Superior 93020 system and the Acquaer. Liberty's listing gives a 2-inch discharge but not a solids size. Do not mistake a discharge size for a solids rating; the outlet is the pipe, not what the impeller can pass. Pumps sold as sewage and effluent pumps sometimes cover both uses, so check the stated solids figure, not the product category, before buying for a toilet.
Horsepower tells you little on its own. What matters is how much the pump can move at your lift: the vertical distance from the basin to where the discharge pipe enters the sewer line, plus an allowance for the horizontal run and fittings. Every flow figure is highest near zero lift and falls as the height rises, until the pump reaches its maximum and moves nothing. Only two sewage listings here state lift, the Superior 93020 at up to 25 feet and the Acquaer at up to 29 feet. For the others, check the manufacturer's pump curve. A 1/2 HP sewage pump is the most common size for a single basement bathroom; larger pumps are for longer or higher runs, or several fixtures.
The pump is one part of a system. The basin must be sealed with a gas-tight cover, usually bolted, and vented to the outside through the plumbing vent system, so sewer gas does not escape into the basement. A check valve on the discharge line stops the pumped waste from running back into the basin every time the pump shuts off. A shutoff valve above it lets the pump be removed for service without draining the line. A high-water alarm is an inexpensive safeguard that sounds before the basin overflows if the pump or float fails. The Superior 93020 includes the basin, sealed cover, discharge and vent connections and a check valve; the other pumps here need those parts bought separately.
Replacing a failed sewage pump with a like-for-like model in an existing, code-compliant basin is a job some handy homeowners do, with the power off, the basin pumped down, and gloves and eye protection on. Installing a new ejector system is different. It means breaking the slab for the basin, tying into the drain, vent and sewer lines, and providing an electrical circuit for the pump, and in most jurisdictions that work needs a plumbing permit and an inspection. A licensed plumber also knows the local rules on basin size, venting and pump rating. A sump pump install is simpler, but its discharge still has to go where the city allows.
A sump pump removes groundwater from an open pit in the basement floor and sends it outside. A sewage ejector pump sits in a sealed, vented basin and lifts waste from a basement toilet, shower, sink or washer up to the sewer line, passing solids commonly up to 2 inches.
The sump pump protects against seepage; the ejector makes below-grade plumbing possible. They are built differently and are not interchangeable.
NoA sump pump is not designed to pass toilet solids and will clog, backing sewage up into the basement fixtures.
Plumbing codes also require a sewage basin to be sealed and vented, with a pump rated for sewage, so a sump pump in that role fails inspection. A sewage pump can technically move clear water, but it belongs in its own sealed basin, not the sump pit.
An effluent pump moves gray water, from a laundry tray or the treated liquid in a septic system, and passes small solids, typically up to about 3/4 inch. A sump pump moves groundwater with little in it beyond grit.
Neither is built for toilet waste, which needs a sewage ejector pump rated for 2-inch solids. Some pumps are sold for both sewage and effluent; the stated solids figure tells you which job they suit.
For a single basement bathroom, a 1/2 HP pump with 2-inch solids handling is the usual choice, and three of the four sewage pumps here are 1/2 HP.
Size it on lift rather than horsepower: measure from the basin to where the discharge meets the sewer line, add an allowance for the horizontal run, and check the pump's curve at that height. Several fixtures or a long, high run may call for more.
For a new installation, in practice yes. It involves cutting the slab, setting a sealed basin, tying into the drain, vent and sewer lines and wiring the pump, and most jurisdictions require a permit and inspection.
Swapping a failed pump for an equivalent one in an existing basin is simpler, but it means working in sewage, so wear protective gear and treat the area as contaminated afterward.
They do different jobs. A grinder pump cuts sewage solids into a slurry so they can be pushed through a small pipe over a long distance or into a pressurized sewer main.
Most basement bathrooms that drain to a nearby gravity sewer line use a standard sewage ejector instead, and a sump pump handles only groundwater. Ask a plumber if the run to the sewer is long or the city sewer is pressurized.
Call (888) 840-6512. The line is answered 24 hours a day, seven days a week, and connects you with an IICRC-certified water damage restoration company that serves your area. A recorded menu picks up first: choose water damage or mold, key in your 5-digit ZIP code, and hold through the short silence while the call is passed to the company.
Describe what you can see — where the water is coming from, how long it has been there, and whether it smells — the more specific you are, the faster the right company is on the line. If the source is a pipe or an appliance, shut the main water valve first. Have four things ready and the call goes quickly: the address, when the water started, what is wet now, and whether you have filed an insurance claim.
Still not sure which of these is your situation? (888) 840-6512 · toll-free · answered 24/7
Methodology: How we source and verify data · Report an error
Free 2-day shipping
Amazon Prime members pay no shipping on restoration equipment
Dehumidifiers, air movers, and moisture meters qualify for free Prime delivery — bulk items that otherwise cost $15–$40 to ship.
Affiliate link — HearthDry earns a bounty if you sign up; costs you nothing extra.
The right sump pump prevents basement flooding before it starts — and handles it fast when it happens. These are the 3 best sump pumps for basement flooding in 2026, tested and ranked by an IICRC-certified water damage restoration technician.
Read the comparisonThe power goes out during the storm that fills your basement — that is the whole reason this category exists. Here is what each system actually costs once you add the battery nobody includes.
Read the comparisonWhen a basement floods, a submersible utility pump gets standing water out fast — before a sump pump can handle the residual moisture. These are the 3 best submersible pumps for water removal in 2026.
Read the comparisonSewage water (Category 3) contains E. coli, hepatitis A, Norovirus, and dozens of other pathogens. The right PPE is not optional — it's the difference between a cleanup job and a biohazard exposure.
Read the comparisonA sump pump check valve keeps the water in the discharge pipe from falling back into the pit each time the pump stops, so the pump does not move the same water twice. These picks are matched to the three common discharge pipe sizes and compared on what each listing states about quiet closing, pressure rating and the gap it needs in the pipe.
Read the comparisonA backwater valve is a one-way flap in your drain line that swings shut when the city sewer backs up toward your house. These picks are in-line valves and a floor-drain float compared on pipe size, access and what each listing actually states, with the plumbing-code test, the install, and the rule for the hours the valve is closed.
Read the comparisonA toilet or shower below your sewer line needs a sealed basin and a pump that can lift 2-inch solids up to the house drain. These picks compare replacement pumps and complete basin kits on what each listing states, with the sizing arithmetic, the vent and check valve, and the cases where an ejector is the wrong fix.
Read the comparison