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  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
  • Reverse Osmosis (RO) Replacement Filters [SoftPro]
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300,000+ Happy Customers

Reverse Osmosis (RO) Replacement Filters [SoftPro]

Three Filters. One Simple Habit That Saves Your Whole System. The RO Replacement Filter Package covers the bottom three filters your SoftPro reverse osmosis system depends on — sediment plus two carbon blocks — the part that needs swapping most often to protect everything downstream.Pick your configuration: Full Set (Bottom 3 + Alkalizing Filter + RO Membrane) / Bottom 3 Filters Only / Advanced Alkalizing Filter / RO Membrane
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In stock. Shipped within 1–3 business days.

  • ASSEMBLED IN USA
  • EASY INSTALLATION
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  • LIFETIME WARRANTY
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DESCRIPTION

Your RO system is a rockstar. But even rockstars need fresh gear.

These are the genuine replacement filters for the SoftPro 5-stage RO system. Grab the Bottom 3 (one 5-micron sediment filter and two 10-micron coconut shell carbon blocks), the Advanced Alkalizing Filter, the RO Membrane, or the full set.

The sediment filter is certified to NSF Standard 42. The carbon blocks knock out chlorine, bad tastes, odors, and cloudiness.

Fresh filters. Fresh water. Happy membrane.

HOW TO USE
  1. Turn off the water to your RO system and open the faucet to release pressure.
  2. Unscrew the housings, toss the old filters, and drop in the new ones. Stage 1 is the sediment filter; stages 2 and 3 are the carbon blocks. Keep towels handy, since a little water will spill.
  3. Screw the housings back on hand-tight. Don’t overtighten.
  4. Turn the water back on and run the faucet for a few minutes to flush.
    Typical schedule: bottom 3 every 6–12 months (sooner if your water is rough), alkalizer every 1–2 years, membrane every 2–3 years.

HOW DOES IT WORK

The bottom 3 filters are your system’s bodyguards. The 5-micron sediment filter catches sand, rust, and grit. Then two carbon blocks grab chlorine, chemicals, and odors.

That protects the RO membrane, the most important and most expensive part. Chlorine and grit damage it fast. Fresh pre-filters mean a longer-lasting membrane.

The membrane removes dissolved solids. The Advanced Alkalizing Filter then adds minerals back and raises pH so your water isn’t flat or acidic.

Skip the pre-filter swap and you’ll pay for it later in membranes. Don’t be that guy.

View full details

Industry Leadership Certifications

  • IAPMO certified
  • WQA tested
  • NSF certified components
  • ISO 9001
  • ANSI

Real Owners, Real Replacement Habits

Bottom 3 Filters For Your 5-Stage RO System

(1 Filter) 5 Micron Sediment Filter (#93027)

  • Removes dirt, rust, sand, grit, and other suspended solids from your water
  • Higher chemical resistance
  • Extends filter life with a much lower pressure drop
  • Certified to NSF standard 42, FDA approved material
  • 100% higher-purity polypropylene — surfactant-free, binder-free, adhesive-free

(2 Filters) 10 Micron Carbon Block Filter (Carbon #C20-2)

  • Highest absorption of chemicals and bad tastes/odors, for a clean, fresh flavor
  • Removes color and cloudiness
  • Higher chlorine reduction
  • Great dirt-holding capacity
  • Coconut shell granular activated carbon
  • Netting, end caps, outer wrap: polypropylene · Gaskets: neoprene
  • Ideal for point-of-use and reverse osmosis applications

Post carbon taste & odor filter.

Maintenance:

Sediment filter — every 12 months. Carbon filter — every 12 months. Note: schedule varies depending on water conditions and usage.

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Replace Filters Regularly. Maintain Your Best Water Quality.

Typical replacement schedule (depends on water quality and usage):

  • Sediment Filter — every 6 to 12 months
  • Carbon Filters — every 6 to 12 months
  • RO Membrane — every 24 to 36 months
  • Advanced Alkalizing Filter — every 12 to 24 months
Advantage Snapshot

Advantage Snapshot

For any RO system — including SoftPro's — it's genuinely important to replace the bottom three filters every three months. Skip that schedule, and you put more pressure on the components after them: your membrane and your post filter or alkalizer filter, which are the last things your water runs through. Replacement is easy — like changing a light bulb. Turn off the water, unscrew, pull the old filter, drop in the new one, screw it back on. That's it.

Keep in mind: your membrane and alkalizer/carbon post filter generally last 3-5 years — but only if you've kept up with these bottom-three replacements on schedule. Skip that, and those more expensive components wear out faster, costing you more down the line.

Over time, unreplaced filters clog and saturate with contaminants, reducing their ability to remove impurities effectively. Regular replacement ensures consistent filtration performance, extends the lifespan of your system's other components, and helps prevent the buildup of harmful substances that could compromise your purified water's quality.

Protect Your Drinking Water. A Smart Health Investment.

  1. Sediment Filter (5 Micron)

    Removes sand, silt, rust particles, and dirt before they reach the RO membrane and downstream filters — protecting them from clogging and damage, improving flow rate and water quality, and extending appliance and component life. NSF Standard 42 certified, FDA-approved material, 100% higher-purity polypropylene.

  2. Stages 2 & 3: Carbon Block Filter (10 Micron, doubled)

    Removes chlorine, chloramines, VOCs, pesticides, herbicides, pharmaceutical residues, and industrial chemicals, while reducing heavy metals like lead, mercury, cadmium, and arsenic. Doubling this stage optimizes overall water quality and protects the downstream RO membrane.

  3. Performance RO Membrane

    The heart of the system: a thin, semi-permeable barrier letting pure water molecules through while blocking dissolved solids, salts, heavy metals, bacteria, viruses, and other impurities. Requires proper maintenance and periodic replacement to prevent fouling and scaling.

  4. Advanced Alkalizing Filter (or Standard Post-Carbon Filter)

    Restores natural alkalinity and mineral balance, raising pH back up after RO's naturally acidic output — adding calcium, magnesium, and potassium back in. The standard post-carbon option instead focuses on removing any remaining off-tastes or odors.

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Drink Healthy Alkaline PH Water

The Advanced Alkalizing Filter raises your water up to 7.0-9.5 pH, depending on your source water. No more acidic water, no more paying a premium for alkaline water in bottles.

We Ship From Multiple Locations For Fast Arrivals And Smooth Installs

We Ship From Multiple Locations For Fast Arrivals And Smooth Installs

30+ years helping Americans get the soft, clean water they need. We answer calls too.

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50 Gallons Per Day

Pentair's GRO TLC Residential Membrane uses an industry-leading Thin Layer Composite membrane, offering high-quality water across a broad range of water chemistry. Every membrane meets our factory's rigorous efficiency requirements before shipping. Encapsulated membranes come with quick-connect fittings already on the housing.

Most standard RO systems run on a 3:1 ratio — for every 1 gallon of filtered water, up to 3 gallons go down the drain. With this high-efficiency 1:1 membrane, you conserve as much as 75% on water waste drainage.

  • 50 gallons per day
  • 300x better efficiency than typical 3:1 filters
  • 100% dry Thin Layer Composite membrane, maximizing shelf life
  • Maintenance-free — encapsulated membrane extends cartridge life up to 2-5 years
  • Dimensions: 2.5" diameter x 16" length · Weight: 2 lb. 8 oz.
  • Flow rate: 50 GPD · Operating pressure: 125 PSI · Max temperature: 120°F (49°C)
  • Operating free chlorine: 0.1 PPM · Operating pH: 4-11
  • 1/4" quick-connect fittings, permeate check valve
Reverse Osmosis 🚰 PURIFIED DRINKING WATER: Add The SoftPro Reverse Osmosis System + Advanced Alkalizer Filter 👇 SELECT FAUCET STYLE & COLOR 👇

Get Safe, Quality, Healthy Drinking Water

There may be more in your water than you want to know. This RO filters down to .001 microns — super filtration that catches viruses, heavy metals, chloramine, and up to 99% of toxins.

It doesn't get much better than this. Drinking water matters too much to leave to chance — make it simple by having the best water in your home. No more buying bottled water, and be eco-conscious while you're at it.

Reverse Osmosis 🚰 PURIFIED DRINKING WATER: Add The SoftPro Reverse Osmosis System + Advanced Alkalizer Filter 👇 SELECT FAUCET STYLE & COLOR 👇

Get Ideal Drinking Water

Standard tap water carries hundreds of Total Dissolved Solids — most homes have no idea how many are actually in their drinking water.

What are TDS?

  • Inorganic salts, calcium, potassium, magnesium, and other minerals and cations
  • Metals, nitrates, chlorides, sulfates, carbonates
  • Contaminants, impurities, and toxins

Where they come from:

Natural sources like rivers and lakes, storm water runoff, agricultural runoff, sewage, urban runoff, plumbing and pipe residue, industrial waste, chemical treatment, and road deicing salt.

Safe, Healthy Drinking Water

Safe, Healthy Drinking Water

A quality reverse osmosis system delivers genuinely ideal drinking water for your family. 0 to 50 PPM TDS is the target for ideal drinking water — and that's exactly the range this system is built to hit.

Chlorine & Chloramine... Not In My Water!

Chlorine & Chloramine... Not In My Water!

More water companies keep increasing chloramine use as a disinfectant — and even within EPA and CDC limits, there are real effects to know about:

  • Respiratory problems and increased asthma risk from chloramine vapors
  • Aggravated digestive disorders
  • Increased pneumonia and other influenza-related death risk
  • Decreased red blood cell efficiency
  • Dry, itchy, flaking skin and dandruff
Reverse Osmosis 🚰 PURIFIED DRINKING WATER: Add The SoftPro Reverse Osmosis System + Advanced Alkalizer Filter 👇 SELECT FAUCET STYLE & COLOR 👇

Stop Drinking Pool Water!

Many Americans are drinking 300 to 600 times above the EPA's chlorine health guidelines. It helps kill microbes — but at high levels, it's a real health concern:

  • Forms Trihalomethanes (THMs) — linked to cancer and other issues
  • Eye and nose irritation
  • Stomach and gut discomfort
  • Dry, itchy, flaking skin and dandruff
See How It Works

See How It Works

Reduces chlorine, chloramines, bad tastes and odors, debris, rust, solids, and other impurities. Reduces TDS, pesticides, heavy metals, viruses, and most other harmful contaminants.

Water Filtration System Waterdrop Reverse Osmosis Water Filtration System - G3 RO Tankless Series - WD-G3-W

For DIY Homeowners, Handymen & Plumbers

Delivered Fast, Paid Your Way

Delivered Fast, Paid Your Way

All orders are processed within just 1 day — 100% transparent order status, automatic email alerts, and anytime tracking.

Real Experts. Real Value

Real Experts. Real Value

Our mission is to empower people to live healthier, happier lives 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 — better taste, fewer toxins, longer-lasting appliances and fixtures, gentler treatment of clothes, hair, and 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.

 WHY BUY FROM US 

Real Experts. Real Value.

💧 EASY OPERATION

Bottom three (Sediment and Carbon Filters) — 6 to 12 months. Alkalizing Filter — 1 to 2 years depending on use. RO Membrane — 2 to 3 years depending on use. Water quality will affect longevity.

Warranty:

Company warrants to the original consumer purchaser that the water conditioning systems and parts specified will be free from defects in material and workmanship from the date of purchase. SoftPro Green RO Water System: 5-year manufacturer warranty.

6-Month Satisfaction Guarantee:

If you're not satisfied, we accept the return of all Fleck brand items in their original condition for a full refund within six months of the ship date. Shipping charges aren't refundable, return shipping is on the customer, and a 25% restock fee applies to returned items. Excludes commercial/custom-build products and consumables/media.

💧 AUTHORIZED. LEGIT. NO KNOCKOFFS.

Genuine SoftPro parts. Authorized dealer status. No gray-market nonsense — just the real thing, every time.

💧 INTELLIGENT ASSESSMENT

Everyone's water treatment needs are different. 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 sizes a solution to meet your space's specific needs
  • Provides expert recommendations of various water treatment solutions
  • Thoroughly educates you on your options
  • Our updated Comparison Chart compares all major brands
  • Our Water Analysis Report grades your local water quality and details any water contaminant findings
💧 UNMATCHED EXPERTISE, DECADES OF EXPERIENCE

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 your local big box store trying to find someone to help you — you'll only find a pushy associate with limited knowledge, moving product from a limited inventory.

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.

💧 REAL EXPERTS THAT YOU CAN COUNT ON

Steer clear of the guessing game. You're investing your hard-earned money into a solution to provide quality water for your family. Unlike the big box stores, our team of experts recommends the best solutions available in the entire marketplace. Our water treatment consultants help you before AND after your purchase.

  • 5.0 / 5

    I just wanted to say thank you for your excellent products and service over the past 12 years.

    Daniel R. Daniel R.Verified CustomerTexas
  • 5.0 / 5

    After we installed the Softpro Elite I noticed a significant difference in the house water quality.

    Julie M. Julie M.Verified CustomerFlorida
  • 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. Roy P.Verified CustomerCalifornia