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Fleck 2510SXT pH Neutralizer Calcite Water Filter (Neutralize Acidic Water)
Green Stains On Your Fixtures? Your Water's Eating Your Pipes. The Fleck 2510SXT pH Neutralizer raises acidic water back to a non-corrosive pH — no cartridges to replace, just add calcite media once or twice a year.
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In stock. Shipped within 1–3 business days.
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DESCRIPTION
Acidic water is eating your pipes. Time to fight back.
The Fleck 2510SXT pH Neutralizer uses calcite media to raise water with a pH of 5.5-6.9 up to a safe, non-corrosive level. That means no more blue-green stains, no more pinhole leaks, and no more pipes quietly corroding behind your walls.
There are no expensive cartridges. You just pour in more media about 1-2 times a year. Auto-backwash keeps the tank clear and your pressure steady
HOW TO USE
Measure it. Match it. Pour it. Forget it.
- Test your water. This filter is built for a pH of 5.5-6.9.
- Measure your well pump flow rate, then match your size: 1.5 cu ft for 5-7 GPM, 2.0 cu ft for 8-10 GPM, 2.5 cu ft for 10+ GPM.
- Install it on your main water line. It has 3/4" ports and handles flow up to 13 GPM.
- Program the auto-backwash on the easy LCD valve.
- Top off the media through the dome plug about 1-2 times a year.
HOW DOES IT WORK
Calcite takes the bite out of acidic water.
- Dissolve: As acidic water touches the calcite, a little of the calcium carbonate dissolves into it.
- Neutralize: That raises the pH toward neutral, and calcite stops there, so it won’t overcorrect under normal conditions.
- Flush: The valve backwashes automatically, clearing trapped sediment and keeping flow strong.
Neutral water in, protected plumbing out.
Real Water, Real PH Fixed
"The whole process has been a great experience. Thank you." — John B.
"Could not be happier. The entire experience was second to none. Everything was shipped perfectly and arrived quickly. Instructions were spot on. After installing the new filter, I realized our old filter was likely going out for a long time. Water tastes so much better and our pH is neutral again!" — Michael F.
6 Month Money Back — The Quality Water Treatment Advantage
We're confident you'll love the water treatment systems we sell. If you don't like it, return it for a full refund.
Find Your Well Pump's Flow Rate. Easy.
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Corrosive... Acid Water... Neutralize It
Save your plumbing. Neutralize acidic water.
- NSF Certified Elite Programmable Control Valve
- Low Maintenance
- Up to 13 GPM Peak Flow Rates
- 3/4" Ports
- Editor & Customer Favorite
Coping With Acidic Water?
Acidic water can eat your plumbing, causing leaks. No one wants to deal with water damage and toxic mold.
Raise the pH within your water from an acidic state to an alkaline, non-corrosive state of 7.0+ pH in your home and protect your plumbing.
That Dreaded Green-Blue Staining On Your Fixtures?
If you get blue or green stains on your fixtures or around drains, it's usually corrosive acidic water at work — pH below 7.0. That staining comes from your copper pipes deteriorating into your water and showing up on fixtures and drains.
Let this go on too long, and your plumbing starts leaking — potentially major water damage and mold, and a full re-pipe replacement. A quality pH neutralizer filter raises the pH to 7.0, a neutral, non-corrosive state.
What Is Calcite Limestone Media?
Acidic water (low pH) usually means low mineral content — minerals are what raise pH in water. Calcite is a naturally occurring calcium carbonate media with a self-limiting property — crushed, milled marble. Applied properly, calcite corrects pH just enough to reach a non-corrosive equilibrium. It doesn't overcorrect under normal conditions.
How it functions:
When acidic water contacts the calcite media, it gradually dissolves the calcium carbonate to raise the pH and neutralize the water — helping prevent scale and the deterioration of rust, copper, lead, and other metals in your plumbing system.
Check Your Effective Flow Rate — Easy As 1, 2, 3
The size of a pH neutralizer system depends on your well pump's flow rate. Check yours before selecting a system — don't pick one requiring more flow than you've got.
How to check it:
- Shut off all faucets — no running water anywhere.
- Place a 5-gallon bucket near your well pump's hose bib.
- Fully open the bib until the pump starts.
- Time how long it takes to fill the bucket.
- Use the flow rate chart to convert your time into GPM.
What Filter Size Do You Actually Need?
Match your effective well pump flow rate to the backwash requirements to select the right size. The 1.5 CUFT is typical if your pump can accommodate it — or go smaller if higher flow rates aren't required.
Note: Minimum well pump flow rates are required — see specs above, or try our WISDOM tool.
Try The Free Sizing Calculator — Intelligent Assessment
Everyone's water treatment needs are different. With our innovative assessment technology, you can take the guesswork out of your water treatment options.
Leverage our Water Intelligence Engine™ to get the best expert recommendations for your unique water-quality needs. We'll also help you discover what's really in your local drinking water and how the top brands stack up.
- Confidently and properly size a solution to meet your space's specific needs
- Get expert recommendations of various water treatment solutions
- Thoroughly educate yourself on your options
- Compare all major brands via our updated Comparison Chart
- Grade your local water quality via our Water Analysis Report
Which Well Filter Package Is For You?
A quality softener alone may not be enough — it depends on your water quality.
Basic Package
High-efficiency softener for most typical well water needs. Reduces: Hard Water · Clear Water Iron up to 3 PPM · Manganese up to 1 PPM. Includes: Fleck 2510 SXT Downflow Water Softener.
pH Neutralizer Calcite Filter
No more acidic water. Raises pH, removes up to 5 PPM iron and 2 PPM sulfur. Includes: Softener + pH Neutralizer Calcite Filter.
AIO Iron Filter
For extremely high iron, sulfur, manganese, or hydrogen sulfide. Reduces: Iron up to 15 PPM · Sulfur up to 5 PPM · Manganese up to 7 PPM. Includes: Softener + AIO Iron Filter.
Ultimate Solution Package
For the most complex well water conditions. Reduces: Iron up to 15 PPM · Sulfur up to 5 PPM · Manganese up to 7 PPM · Raises pH to 7.0. Includes: Softener + pH Neutralizer Calcite Filter + AIO Iron Filter.
Specs, Details, Maintenance + More
- Specs, Details & FAQs
- Install Guides & Videos
- Support Team Request
- Warranty & Guarantee
Delivered To Your Door With Ease
All orders ship within 1–3 business days — 100% transparent order status, automatic email alerts, and anytime tracking.
Real Experts. Real Value.
Our mission is to help people enjoy better water by providing quality water solutions for their families and businesses. We've delivered best-in-class water treatment solutions and customer service across North America since 1990.
As a family-owned business, our priority is our customers' satisfaction: improved taste, eliminated toxins, extended appliance and fixture life, gentler treatment of clothes/hair/skin, and no more costly plumbing corrosion or staining.
We carry the best brands in the industry in value-added packages, making installation and operation simple and efficient.
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5.0 / 5
I just wanted to say thank you for your excellent products and service over the past 12 years.
Daniel R.Verified CustomerTexas
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5.0 / 5
After we installed the Softpro Elite I noticed a significant difference in the house water quality.
Julie M.Verified CustomerFlorida
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5.0 / 5
I decided to go with the Softpro water softener over Fleck. Very impressed and satisfied with their products and customer service!
Roy P.Verified CustomerCalifornia
WHY BUY FROM US
Real Experts. Real Value.
💧 AUTHORIZED. LEGIT. NO KNOCKOFFS.
Genuine Fleck/Pentair parts. No gray-market nonsense — just the real thing, every time.
💧 UNMATCHED EXPERTISE
At Quality Water Treatment, we treat our customers like family, and we know the products inside and out. Don't waste your time wandering around a big box store hoping to find a true expert. Shop with confidence here instead, and we'll get you the correct equipment for your specific needs, delivered right to your door.
💧 DECADES OF EXPERIENCE
After over 30 years in business, we know water treatment like no one else. Our trained water treatment consultants answer every question, compare all major brands, and never push a sale. Connect via live chat, text, phone, or email.
💧 AFFORDABLE WAYS TO PAY
You deserve quality, clean, soft water starting now. Zip gets you 4 interest-free payments, or pay a small amount each month with Affirm.
💧 REAL EXPERTS THAT YOU CAN COUNT ON
Steer clear of the guessing game. You're investing real money in a solution for your family's water. Unlike the big box stores, our team recommends the best solution actually available in the entire marketplace. Our water treatment consultants help you before AND after your purchase. Our customers are like family.
💧 REAL SUPPORT FOR YOUR FLECK SYSTEM
Fleck is a genuine industry leader, made using proven, heavy-duty components. Email, phone, and text support, along with install videos, give you real help before, during, and after installation.
💧 RAISE PH LEVELS
Eliminates acidity in the pH range of 5.5 to 6.9.
💧 CARTRIDGE-FREE, ECONOMICAL
Simply pour in media as needed, typically 1-2 times per year. Expensive calcite cartridges are not required.
💧 EASY-ACCESS DOME PLUG
Simple to check and add calcite media as needed.
💧 AUTO-BACKWASH
Automatically backwashes out trapped sediment and alleviates water pressure drops.
💧 SYSTEM HIGHLIGHTS
- Eliminates acidity in the pH levels of 5.5 to 6.9
- Longer life and higher flow rates compared to calcite filter cartridge systems
- Automatic backwash — don't get plugged up
- Fully-adjustable backwash and rinse cycles, saving water and maximizing performance
- Time-tested hydraulically balanced piston seal and spacers for years of trouble-free service
- Simple, user-friendly LCD display
- Rugged, heavy-duty build
