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The ion 1/3 hp cast iron stainless steel sump pump w/ digital level control hp20157 is available for purchase today.

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iON 1/3 HP Cast Iron Stainless Steel Sump Pump w/ Digital Level Control HP20157

iON Products Sump Pumps and AccessoriesModel: BA-33I
(Based on expert analysis, manufacturer ratings and customer reviews)
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
9 Reviews
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  • Accessories
Primary Sumps Pumps
Horse Power
Switch Type
Ion Sensor
Powerful & Efficient Submersible Pump
Ideal for heavy-duty sump applications

Cast Iron Stainless Steel Construction
Ensures years of reliable operation

ION Digital Level Control
First of a kind solid-state sensing technology w/ no moving parts

Thermally Protected Motor
reduces overheating

Stainless Steel Screened Intake
Prevents debris from entering the pump

Poly Resin Top Cap and Handle
Made for easy installation and maintenance

Piggyback Pump and Switch Cord Assembly
Made for easy serviceability

Min sump pump basin size 18" X 24"

*Note - (IN-SPB1-1) Required For Mounting Sensor On Pipe

Need Help? Ask Our Sump Pump Experts.
Running Amps
Thermal Protection
Power Cord Length
10 Feet
Oil Free Motor
Starting Amps
Housing Material
Stainless Steel
Solids Handling Size
.5 inch
Float Type
Ion Sensor
GPH @ 0 feet
GPH @ 5 feet
GPH @ 10 feet
GPH @ 15 feet
GPH @ 20 feet
Discharge Port Size
1-1/2 Inch
Built-in check Valve
Manual Override
18 Pounds
Product Length
7.9 Inches
Product Width
5.5 Inches
Product Height
12.5 Inches
Consumer Warranty
3 Years
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  5 Questions
Q: Is the Storm Pro Ba33m 1/3 HP UL inspected?
by Gregory Speicher from Pennsylvania on January 28, 2012

A: No they are not, but they do carry the CSA certification.

CSA International (Canadian Standards Association), a member of the CSA Group, is a provider of product testing and certification services for electrical, mechanical, plumbing, gas and a variety of other products. Recognized in the U.S., Canada and around the world, CSA’s marks appear on billions of products worldwide.

CSA International certification marks indicate that a product, process or service has been tested to a Canadian or U.S. standard and it meets the requirements of an applicable CSA standard or another recognized document used as a basis for certification.
by Jim, Product Expert
Q: Jim-
Basement has a high water table so I need a switch that activates the sump pump about 15.5 inches from the base of the basin. Looked at the Stormpro with the vertical swith that attaches to the discharge pipe or the Ion switch that may be digitally adjusted to determine when the switch turns on the pump. Would either of these work if I need the 15.5 inches?
Also, I have a 1.5 inch discharge pipe, if I would purchase the larger hosrsepower Stormpro with a 2 inch discharge, and use a reducer, would this hinder the performance of the 1/2 horse model?
Thanks for any advise you can give me.

by Dan Dragues from Missouri on March 06, 2011

A: Unless you're using the Ion Genesis controller, which you can increase the pumping differential, the standard pump differential is still 6". There might be a way to adjust the mechanical version to get a few more inches out of it, but that's not suggested by the manufacturer.

Reducing the output would create more pressure and lower the output of the pump. If you do by the higher horsepower, I'd suggest upgrading to a the 2" discharge.
by Jim, Product Expert
Q: Looking for an automatic dewatering pump that turns on at 1" +/-. Have no pump pit, it would be set on floor.
by Art from New Jersey on March 04, 2011

A: This pump might work for you....

by Jim, Product Expert
Q: How does the sump pump connect to the independent float switch, Does the pump plug into the switch and the switch plugs into the power?
by Mark from New Jersey on February 09, 2011

A: Yes, most external float switches utilize this design. It's consider a "Piggyback" style plug. Very similar to how sets of Christmas lights connect to each other.
by Jim, Product Expert
Q: Would this pump be suitable for a 12' x 12' basement?
by Cody Dix from Ohio on January 10, 2011

A: The interior dimensions of a basement aren't a major factor in sizing a sump pump correctly.

Monitoring your current pump during normal operation and during a storm can give you a better idea of what size pump you would need.
by Jim, Product Expert
iON Products BA-33I Reviews & Ratings
Overall Rating
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
High Quality (5)
Quiet (4)
Exceeded Expectations (3)
Reliable (3)
I'd Buy It Again (3)
Expensive (2)
100% of respondents would recommend this product to a friend
9 Reviews  Sort by 
Timothy O.
Winfield, IL
Purchased from Sump Pumps Direct
Purchased 8/17/16
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Dependable & Quiet
Installed this pump with my 12-year old son. It runs quiet, and I'm looking forward to years of dependability from not only the pump but also the digital switch. I'm pleased with the materials (cast iron and stainless steel) and the construction, though the weight is substantially less than 30 pounds as stated on the website (not surprising--how could a 1/3HP pump weight that much?). I left the digital switch mounted on the pump as shown, since (after testing) the on/off levels were perfect for... more
Pros: High Quality, Quiet, Reliable, I'd Buy It Again
Timothy Recommends This iON Products Product
Jim, the Sump Pump Expert
Product Expert
Sorry about the typo on our site, it has now been updated This pump and switch should be around 18 lbs.
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Percy H.
Gary, IN
Purchased from Sump Pumps Direct
Purchased 4/24/13
5 out of 55 out of 55 out of 55 out of 55 out of 5
Storm Pro With Ion Switch
Bought sump pump for my daughter's house. She has been replacing them every two year. I researched to find out that the most frequent cause of failure is the float switch. Therefore I bought the Storm Pro with an ion switch and no moving parts. I hope this will last much longer. So far so good and it is very quiet. I have recommended this pump to a close friend. They bought theirs a approx. 6-5-13.
Pros: Durable, Quiet, High Quality, I'd Buy It Again
Percy Recommends This iON Products Product
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Rollinsford, NH
4 out of 54 out of 54 out of 54 out of 54 out of 5
Strompro 1/3 Hp Pump W/ Ion Switch
I purchased the StromPro Ion combination. When finally the condition for operation were met, the 6" switch didn't work. Then I put the switch in a bucket to check operation and observes the switch at didn't operate at 11". I believed the problem to be in the piggyback cable be cause I able to get the level switch to operate somewhat.

I also purchased a 10" Ion switch to operate another pump in the sump, the same problem with this switch. I notified Ion of the problem and... more
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Alex Ramos
Fort Washington, MD
Purchased from Sump Pumps Direct
Purchased 4/4/11
5 out of 55 out of 55 out of 55 out of 55 out of 5
Excellent Customer Service From Manufacturer
I installed the Stormpro 1/3 hp with ion switch ba-33i in my home last Saturday. I was extremely happy at how fast the new pump drained water out of the sump well compared to the builder grade pump previously installed.

Not so happy that it kept running, a little troubleshooting, and I found that the switch was bad. The manufacturer stepped up to the plate and shipped me a brand new switch in 2 days with a return label (no out of pocket cost for yours truly).

When a manufacturer... more
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Nilesh M.
Oyster Bay, NY
5 out of 55 out of 55 out of 55 out of 55 out of 5
Extremely Quiet, Easy Install, Expensive Upfront But Lot Cheaper
I am generally not the type to write reviews, but in this case I am compelled to do so. I replaced an existing sump pump in my basement. The old pump (zoller) was working but the float switch was not. The labor cost of replacing the float switch was almost as much as installing a new pump. I have been using the stormpro (BA-33i) for 6 months now. I am extremely happy with the performance.

I spent $100 more in this pump but I guess I will not be in the same situation where the pump is fine... more
Pros: Quiet, Exceeded Expectations, Reliable, High Quality
Cons: Expensive
Nilesh Recommends This iON Products Product
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Noel C.
Alexandria, VA
Purchased from Sump Pumps Direct
Purchased 6/12/15
4 out of 54 out of 54 out of 54 out of 54 out of 5
Powerful And Quiet
And easy to install....
Noel Recommends This iON Products Product
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Karl H.
Fairport, NY
Purchased from Sump Pumps Direct
Purchased 6/10/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Is It Running?
Wow, this pump is quiet - a little disconcerting in some ways. The original pump (Ridgid) wasn't loud, but you could tell when it was running so you knew it was working. Not complaining, given the reputation of this pump, I shouldn't worry and it's impressive how quiet it runs given how well it pumps.

Just another indication of the quality and construction of this pump that I can appreciate with my mechanical engineering background. We've had a lot of rain since I installed the pump and... more
Pros: High Quality, Quiet, Exceeded Expectations, I'd Buy It Again
Cons: Expensive
Karl Recommends This iON Products Product
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Purchased from Sump Pumps Direct
Purchased 12/28/14
5 out of 55 out of 55 out of 55 out of 55 out of 5
Hot Rodded Lil' Sump Pump
I chose this model to replace a 17 year old R2D2 looking 1/3rd hp Hydromatic. This new Ion StormPro is a fantastic pump. It's quiet, has a small footprint and plays well together with my Basement Watchdog Big Dog Sump Pump.

Pumping volume is amazing. My lift is approx 7ft of 1-1/2" PVC until it discharges through 48 ft of plastic convoluted pump drain hose before exiting. After 6mos usage I have total confidence in pump and Ion switch.

This pump was exactly what I was looking for... more
Pros: High Quality, Durable, Exceeded Expectations, Reliable
Andrew Recommends This iON Products Product
Andrew's Experience With Sump Pumps Direct
Web Site


"PED is awesome! What a great website! Thanks for a really cool conglomeration of information and product. Nice to find a seller of quality products with expansive knowledge by a trusted seller who delivers smoothly."
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Richard P.
Williamsville, NY
Purchased from Sump Pumps Direct
Purchased 1/28/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
So Far, I'm Happy With It.
So far, the iON sump pump works fine with plenty of power. I consider my sump pit moderately active with rainy weather, and I'm confident it will handle it.

The digital control so far is very accurate and goes off within a half inch each time the water fills the sump. I do have a backup pedestal sump pump next to it, and the sump pump circuit is on one of the natural gas generators backup electric line.

So far the pedestal has warned me twice the primary pump has failed so I do... more
Richard Recommends This iON Products Product
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