Get the Superior Pump 92551 (10.0): cast iron, 25 ft shut-off and a 5-year warranty. The Zoeller 84 (9.5) moves more water at 10 ft. For short lifts, the lighter Zoeller 81.
Top pick: Superior Pump 92551$148.99 at AmazonPrice as of Oct 24, 2026, 5:30 AM EDT · low stock then
All three keep the motor above the pit on a column, with a float rod that switches them on. Each was new and in stock on Amazon on Oct 23, 2026. I’ve used these picks.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
How much water each pump moves at your lift
Enter how high the water has to climb, from the pit floor to where the pipe turns sideways. The calculator reads each maker’s published curve.
Lift is the number that matters most. A pump’s box flow is measured with almost no lift; at 10 or 15 ft, the same pump moves far less. The shut-off head is where flow drops to zero: 16 ft for the Zoeller 81, 24 ft for the Zoeller 84 and 25 ft for the Superior 92551, per their makers.
PlumbingPicks spec score out of 10, from Zoeller’s FM2776 tech data and Superior Pump’s product page, read Oct 23, 2026. It is not a customer rating or our own test.
Best for high lifts and long warranty
Superior Pump 92551
1/2 HP cast iron pedestal sump pump with adjustable vertical float switch
1/2 HP3,600 GPH at 0 ft1-1/2 in. NPT10 ft cordUL, CSA listed
Buy it if
Your pit is deep or the discharge climbs high, and you want the longest warranty here.
Skip it if
Your pit is narrow and crowded. A float rod and column need room to move freely.
The 92551 is the pedestal pump I’d put in most basements, and I’ve used it. It scored 10.0, the only perfect score here.
Superior Pump’s product page rates it at 3,600 gallons an hour with no lift and 2,700 at 10 ft, with a maximum lift of 25 ft. That’s the highest reach of the three, and it keeps useful flow at heights where the Zoeller 81 has nearly stopped.
The build is cast iron where it counts. Superior lists the pump body, base and motor casing as cast iron, with ball bearings top and bottom and a stainless motor shaft. Cast iron is heavy, which also keeps a tall pedestal from walking in the pit.
Superior backs it with a 5-year limited warranty and lists UL, CSA and SSPMA certification. Five years is more than twice the coverage of either Zoeller.
The switch is an integral vertical float on a metal rod. Superior says the on level is adjustable and the off level is 6 in. Set the on point high enough that the pump runs longer, less often cycles; short cycling is what wears out pedestal switches.
One honest warning about the maker data. Superior’s page also includes lines that read like they belong to a submersible, such as “oil-cooled” and a vortex impeller description. I scored only the figures that agree with the pedestal design and the manual, and left those lines out.
It has a 10 ft cord and a 1-1/2 in. NPT side discharge. Plug it into its own GFCI outlet near the pit, not an extension cord, and add a check valve on the discharge.
Superior lists a liquid range of 35 to 180°F, so warm water from a floor drain or a water heater pan line won’t bother it.
Best for the most water at 10 ft
Zoeller 84
0001 Old Faithful Model 84 1/2 HP pedestal sump pump, 115 V
You get a lot of water and the lift is around 10 ft, where this pump moves the most.
Skip it if
Your pit is smaller than 18 by 22 in. Zoeller lists that as the minimum for its 80 series.
The Model 84 is the strongest pedestal pump here at a normal basement lift, and I’ve used it. It scored 9.5.
Zoeller’s FM2776 tech data sheet puts it at 59 gallons a minute at 5 ft, 51 at 10 ft, 38 at 15 ft and 17 at 20 ft, with a 24 ft shut-off. At 10 ft that beats the Superior’s 45 gallons a minute, so for a wet basement with an ordinary lift, this one empties the pit faster.
It’s the 1/2 HP model of Zoeller’s 80 series. The sheet lists a cast iron pump housing, a split-phase 1725 RPM motor, an air-cooled design, an automatic-reset thermal overload, a permanently lubricated upper sleeve bearing and a bronze lower bushing. It draws 7.3 amps and weighs 22.5 lb.
Zoeller says it’s tested to UL 778 and CSA C22.2 No. 108, the North American sump pump standards. The impeller is a thermoplastic vortex design.
It lost points only on warranty. Zoeller’s product page lists a 2-year limited warranty, against Superior’s five.
The Amazon listing gives the switch settings: an adjustable 12 in. cycle, factory set at 9 in., with a maximum on of 16 in. and a minimum off of 4 in.
Zoeller lists a minimum pit size of 18 by 22 in. and a 1-1/2 in. NPT discharge. It also says the motor must sit above the pit cover, indoors, protected from water spray and high humidity.
Zoeller rates it for water up to 130°F and says it isn’t for flammable liquids. Compared with the 1/3 HP Model 82 in the same series, the 84 adds 3 ft of shut-off head and about 10 more gallons a minute at 10 ft, per the same sheet.
The cord is 7-1/2 ft, so plan the outlet location before you set the pump.
Best for short lifts and light carry
Zoeller 81
Zoeller Model 81 1/3 HP thermoplastic pedestal sump pump, automatic
Your lift is under about 10 ft and you want a light, rust-free pedestal.
Skip it if
Your discharge climbs more than about 12 ft. Its flow falls off fast above 10 ft.
The Model 81 is the light, simple pedestal pump in Zoeller’s 80 series, and I’ve used it. It scored 8.5.
Zoeller’s tech data lists 50 gallons a minute at 5 ft, 36 at 10 ft and 10 at 15 ft, with a 16 ft shut-off. At a short lift it keeps up; above 10 ft it drops off quickly, which is the main reason it scored lower.
Its pump housing is thermoplastic, so it won’t rust, and the whole pump weighs 15 lb, per Zoeller. It runs on a 1/3 HP split-phase motor drawing 4.0 amps, with the same thermal overload and bearings as the Model 84.
Zoeller’s product page gives it a 2-year limited warranty and the same UL 778 and CSA C22.2 No. 108 testing as the larger models.
A word on the listing. The Amazon title is generic and the bullets are thin, but the listing’s UPC, 053514024666, matches the UPC on Zoeller’s own Model 81 page. That’s how I confirmed it’s the genuine pump.
The discharge is 1-1/4 in. NPT, smaller than the other two. If your existing pipe is 1-1/2 in., you’ll need a reducer, which is a small job.
Like the Model 84, it needs Zoeller’s minimum 18 by 22 in. pit and a dry, indoor spot for the motor above the cover.
Zoeller’s sheet shows the air-cooled motor, a 130°F maximum water temperature and a thermoplastic vortex impeller, the same as its bigger siblings. At 5 ft of lift it moves 50 gallons a minute, only 9 fewer than the Model 84, so in a shallow basement the gap between them is small.
For a light-duty pit with a short lift, it’s a good fit; for a heavy-water basement, step up to the Model 84 or the Superior.
The three side by side
Pick
Spec score
Photo
HP
Flow at 10 ft
Shut-off head
Housing
Warranty
Short pros / cons
Buy
Superior 92551
10.0
1/2
45 GPM
25 ft
Cast iron
5 yr
Most lift, longest warranty / Some conflicting maker text
Sources: Zoeller FM2776 tech data for Models 81, 82 and 84 (rev. 0126); Superior Pump 92551 product page. Flow at 10 ft for the Superior is its 2,700 GPH rating divided by 60.
Checked and left out
Pump
Why it’s not a pick
Zoeller 82 (1/3 HP)
The Amazon listing says cast iron housing; Zoeller’s data sheet lists thermoplastic. I won’t link a listing that contradicts its maker.
Red Lion RL-SP33PED
Red Lion’s site didn’t return a product page or data sheet for it, so its figures couldn’t be checked.
Star 3CDH and 5CDH
Star Water Systems’ site blocked access, so the listing figures couldn’t be checked against the maker.
K2 SPP03301K and unbranded pedestals
No maker data sheet found to confirm the listing figures.
Pedestal or submersible: which fits your pit
Question
Pedestal
Submersible
Where the motor sits
On a column above the water
Sealed, under the water
Narrow or shallow pit
Often fits where a submersible won’t
Needs room for the whole pump
Noise
Motor is out in the open, so you hear it
Water muffles it
Servicing
Motor and switch are easy to reach
Pull the pump to service it
Cooling
Air-cooled motor, per Zoeller
Cooled by the water around it
Basement use
Motor must stay dry, above the cover
Can sit fully under water
Pedestal pumps make sense in a narrow pit, where you want the motor out of the water, or where you’d rather reach the switch without pulling the pump. If your pit is standard size and you want quiet, a submersible is usually the better choice; see best sump pump.
Reading lift, flow and shut-off head
Lift
Zoeller 81
Zoeller 84
Superior 92551
5 ft
50 GPM
59 GPM
About 53 GPM (read between 0 and 10 ft)
10 ft
36 GPM
51 GPM
45 GPM
15 ft
10 GPM
38 GPM
About 30 GPM (read between 10 and 25 ft)
20 ft
None
17 GPM
About 15 GPM (read between 10 and 25 ft)
Shut-off
16 ft
24 ft
25 ft
Zoeller publishes a full curve; Superior publishes only its flow at 0 and 10 ft and its maximum lift, so the in-between figures for the 92551 are straight-line readings, not maker numbers. Measure your lift from the pit floor to the highest point of the discharge pipe, usually where it passes through the rim joist.
Cast iron or thermoplastic housing
Question
Cast iron (Superior 92551, Zoeller 84)
Thermoplastic (Zoeller 81)
Weight
Heavier; the Zoeller 84 is 22.5 lb
Lighter; the Zoeller 81 is 15 lb
Rust
Can rust where the coating wears
Won’t rust
Stability on a tall column
The weight keeps it planted
Lighter base can shift if the float drags
Motor
1/2 HP on both picks here
1/3 HP
Housing material matters less than lift and flow. Choose cast iron when the pump will work hard and often, and thermoplastic when the pit is light-duty and you value a pump you can lift with one hand.
Power, outlet and cord length
Pump
Volts
Amps
Cord
Superior 92551
115 V
Not consistently published
10 ft
Zoeller 84
115 V
7.3 A
7-1/2 ft
Zoeller 81
115 V
4.0 A
7-1/2 ft
Give the pump its own outlet near the pit. Newer electrical codes call for GFCI protection on basement outlets; check what your local code requires, and test the GFCI often, since a tripped one silently stops the pump. Zoeller’s sheet also says controls and wiring should be done by a qualified licensed electrician.
Avoid extension cords. A pedestal’s cord is meant to reach a nearby outlet, and a loose extension connection on a damp basement floor is a common failure point.
Discharge pipe size
Pump
Discharge
Typical pipe
Superior 92551
1-1/2 in. NPT
1-1/2 in. PVC
Zoeller 84
1-1/2 in. NPT
1-1/2 in. PVC
Zoeller 81
1-1/4 in. NPT
1-1/4 in., or reduce from 1-1/2 in.
Keep the run as short and straight as you can. Every elbow and foot of pipe adds friction, which is why the calculator’s numbers are a best case.
Pit size and float clearance
Check
What to look for
Pit width and depth
Zoeller lists a minimum 18 × 22 in. pit for its 80 series
Float rod travel
Clear of the pit wall, inlet pipe and discharge
Cover
Motor must sit above the cover and stay dry
Water level
Pump-off level stays above the pump inlet
A float rod that rubs the wall or catches on the inlet pipe is the most common way a pedestal pump fails to start. After you set it, lift the float by hand to confirm it switches on cleanly, then pour in water and watch a full cycle. For a new or replacement pit, see sump pump basins.
Setting the float switch
1
Set the off point
Low enough to empty most of the pit, but above the intake; Superior lists off at 6 in.
2
Set the on point
High enough for a long run each cycle; Zoeller’s 84 is factory set to a 9 in. cycle.
3
Test by hand
Lift the rod and confirm the motor starts and stops.
4
Test with water
Fill the pit with a hose or bucket and watch a full cycle.
5
Recheck after storms
Debris can shift the float stops.
Short, frequent cycles wear out switches and motors. A longer cycle with fewer starts is easier on any sump pump.
Installing a pedestal sump pump
1
Unplug and drain
Pump the pit down and unplug the old pump.
2
Clean the pit
Remove gravel and silt from the bottom; set the pump on a firm, level spot.
3
Attach the discharge
Thread the pipe into the discharge and add a check valve above the pump.
4
Set the float rod
Adjust the stops for your on and off levels.
5
Plug into a GFCI
Its own outlet, no extension cord.
6
Run a full test
Fill the pit and watch it cycle and the check valve close.
The motor on a pedestal is easy to reach, so most care takes minutes. Unplug the pump before you touch the float rod or reach into the pit.
How to choose a pedestal pump
1
Measure your lift
Pit floor to the highest point of the discharge pipe.
2
Check the pit size
At least 18 × 22 in. for Zoeller’s 80 series.
3
Pick by flow at that lift
Use the calculator above.
4
Match the discharge size
1-1/2 in. on the Superior and Zoeller 84; 1-1/4 in. on the Zoeller 81.
5
Weigh the warranty
5 years on the Superior, 2 on the Zoellers.
Questions people ask
What is the best pedestal sump pump?
On our spec score, the Superior Pump 92551 (10.0), then the Zoeller 84 (9.5).
Are pedestal sump pumps any good?
Yes, for narrow pits and easy servicing. They’re louder than submersibles because the motor is in the open.
How long do pedestal sump pumps last?
Makers don’t publish a life span. Warranty is a clue: 5 years on the Superior 92551, 2 on the Zoellers.
Can a pedestal pump sit under water?
Only the pump end. Zoeller says the motor must stay above the cover and dry.
What size pit does a pedestal pump need?
Zoeller lists 18 × 22 in. minimum for its 80 series pedestals.
Is 1/3 HP enough?
For short lifts, yes. The 1/3 HP Zoeller 81 moves 36 gallons a minute at 10 ft but only 10 at 15 ft.
Do I need a check valve?
Yes. It stops the water in the pipe from draining back into the pit each cycle.
Can I replace a submersible with a pedestal?
Often, if the pit is at least 18 × 22 in. for a Zoeller 80 series and the motor can sit dry above the cover.
Which is better, Zoeller or Superior?
On our score, the Superior 92551 edges the Zoeller 84 on lift and warranty; the Zoeller 84 moves more water at 10 ft.
Why is my pedestal pump so loud?
The motor sits in the open air. A pit cover helps; a submersible is quieter.
How I picked these
Why trust me
I’m Isaac Daniels, a licensed journeyman plumber in Georgia (license #JP507711), and I’ve used all three picks. Every figure comes from Zoeller’s FM2776 tech data and product pages and Superior Pump’s product page, read Oct 23, 2026, plus the Amazon listings read the same day.
How I pick
Pedestal pumps only, from makers that publish data I could check.
New and in stock on Amazon on the day of the update.
Every pick scores 7.0 or more on the spec score below.
Prices come from Amazon’s API with the time they were read.
The spec score, check by check
Six checks, one sixth each, scored 0 to 10 and averaged to one decimal. The score reads makers’ published specs; it isn’t our own test, and buyers’ opinions play no part in it.
Check (weight)
How it’s scored
Flow at 10 ft lift (1/6)
2,700 GPH (45 GPM) or more 10; 2,000 to 2,699 GPH 8
Shut-off head (1/6)
24 ft or more 10; 20 to 23 ft 9; 16 to 19 ft 8
Pump housing (1/6)
Cast iron 10; thermoplastic 8
Warranty (1/6)
5 years 10; 2 years 7
Safety listing (1/6)
10 if the maker publishes UL 778/CSA testing or listing
Listing matches maker (1/6)
10 when the Amazon model or UPC matches the maker’s record
Total
Average of the checks, to one decimal
Pump
Flow
Head
Housing
Warranty
Listing
Match
Score
Superior 92551
10
10
10
10
10
10
10.0
Zoeller 84
10
10
10
7
10
10
9.5
Zoeller 81
8
8
8
7
10
10
8.5
Sources
Zoeller, Models 81, 82 and 84 pedestal dewatering pumps technical data sheet, FM2776, rev. 0126 (zoellerpumps.com).
Zoeller, Model 81, 82 and 84 product pages (warranty, UPC), read Oct 23, 2026.
Superior Pump, 92551 product page and pedestal pump manual (superiorpump.com), read Oct 23, 2026.
Amazon product data for B006H3X2XQ, B001X5AWAO, B001X580LW, B07CZK6HSM and B08NR6MHWL, read through the Creators API on Oct 23, 2026.
