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Whole-house filtration · XL

The AquaOx XL

The largest media bed on the market. Built for 5+ bathroom homes.

★★★★★4.83from 72 reviews
$4,999$5,999Save $1,000 (17%)

or $208/mo with Affirm · 0% APR available

  • Filters 300+ contaminants including PFAS, chlorine, lead
  • 37 GPM peak flow, handles 5+ bath homes
  • 3 million+ gallon life. Self-cleans, no cartridges
  • Up to 10-year warranty. Made in USA

Choose your water source

Required

Tell us which water source you have so we ship the right setup.

Warranty

10-year

Made in

USA

Owners

5,000+ homes

Financing

0% APR

Ships within 10 business days. Tracking emailed when your system leaves the warehouse.

Built with

NSF-certified parts & media

Made in

USA

Financing

0% APR with Affirm

Homes served

5,000+

What it removes

What you'll stop drinking

A short list of what's actually in your tap water, and what the The AquaOx XL removes.

Disinfectants & by-products

  • Chlorine
  • Chloramines
  • Trihalomethanes
  • Haloacetic acids

Heavy metals

  • Lead
  • Mercury
  • Arsenic
  • Cadmium
  • Chromium-6

Industrial & agricultural

  • PFAS / "forever chemicals"
  • Pesticides
  • Herbicides
  • Microplastics

Aesthetic

  • Sediment
  • Rust
  • Taste
  • Odor
  • Color
Inside the tank

8 layers doing real work

Water enters at the top of the tank and works downward through each media layer. Every layer targets a different category of contaminant.

Water in ↓
Filter-Ag
KDF 85
KDF 55
Vortech plate
Centaur Catalytic Carbon
Activated Coconut Shell Carbon
Garnet
Vortech plate
Filtered water out ↓
  1. 1

    Filter-Ag

    Filters suspended material and turbidity, with low pressure loss.

  2. 2

    KDF 85

    Filters chlorine, lead, mercury, and other metals. Inhibits bacteria, algae, and fungi growth.

  3. 3

    KDF 55

    Reduces free chlorine and water-soluble heavy metals (lead, mercury, copper, aluminum). Also controls scale and bacterial growth.

  4. 4

    Vortech plate

    Evenly distributes flow into the carbon stages — no channeling.

  5. 5

    Centaur Catalytic Carbon

    Filters chloramines, hydrogen sulfide, and VOCs.

  6. 6

    Activated Coconut Shell Carbon

    Filters chlorine, chlorinated solvents, and VOCs.

  7. 7

    Garnet

    Refines the water, traps sediment, and filters larger solids like dirt, hair, and rocks.

  8. 8

    Vortech plate

    Even water distribution and efficient backwash — no gravel underbedding.

Every 8-layer The AquaOx XL is installed with fresh media at the factory in the USA.

Details

Specs & the full story

Meet our most powerful, high-capacity whole house water filter—The AquaOx XL. Built for homes with 4+ bathrooms, this premium system offers a massive service flow of up to 37 GPM—ensuring zero pressure drops, even when showers, sinks, and laundry are running simultaneously. It’s the ultimate solution for homeowners who demand the absolute best in water quality without compromise. Engineered to remove industrial byproducts, heavy metals, volatile organic compounds (VOCs), and more, AquaOx XL guarantees pristine, better-than-bottled water everywhere you turn.

Like its smaller sibling, the original AquaOx, the XL model is Made in the USA using premium NSF-certified materials, but with even more capacity and a specially designed pre-sediment filter. Coupled with our advanced AquaOx Electronic Backwashing Head, the system self-cleans every few days—keeping your filter media fresh, efficient, and ready to protect your family for 10+ years.

The Elite Choice for Larger Homes

  • Supercharged Filtration: Employs the same multi-stage media (catalytic carbon, KDF 85, coconut shell carbon, garnet, and Filter AG) as our standard AquaOx, but in higher volume to handle higher flow rates. 
  • Massive Flow Rate (37 GPM): Perfect for households with 4+ bathrooms, multiple occupants, and high water demands—no more worrying about pressure drops during peak usage.
  • Engineered for Peak Performance: Electronic backwashing cycles prevent channeling and fouling, ensuring you get the same superior filtration day after day.
  • 10-Year Warranty + 1-Year Money-Back Guarantee*: We stand behind the AquaOx XL with robust coverage, so you can invest with confidence.

What It Removes

Like all AquaOx systems, the XL is designed to tackle a wide range of contaminants, from everyday impurities to stubborn chemicals and metals:

  • Chlorine & Chloramines: Removes harsh chemical tastes and odors for cleaner, safer water.
  • Heavy Metals (KDF 85): Targets lead, mercury, arsenic, iron, and hydrogen sulfide—common culprits in well and city water.
  • Industrial & Agricultural Runoff: Filters out pesticides, herbicides, VOCs, and more, safeguarding your family against hidden toxins.
  • Sediment & Particulates: Removes dirt, rust, and debris with the included heavy-duty pre-sediment filter plus the main filter’s multi-layer media.
  • Organic Compounds & Microbes: Inhibits the growth of bacteria, algae, and fungi, promoting cleaner, fresher water from every tap.

Filter Media Overview

  • Catalytic Carbon: Breaks down chloramines and VOCs, ensuring water is free from chemical byproducts and synthetic pollutants.
  • KDF (85): Reduces iron, hydrogen sulfide, and heavy metals—an ideal media for bigger flow systems like the XL.
  • Coconut Shell Carbon: Refines taste and odor, trapping residual chemicals and enhancing overall water flavor.
  • Garnet & Filter AG: Provide an additional layer of sediment filtration and prevent channeling, allowing consistent performance at high flow rates.
  • AquaOx Electronic Backwashing Head: The automated control valve that regularly cleans, re-levels, and rejuvenates the media bed, ensuring no drop in efficiency.

Technical Specifications

  • Height × Diameter: 64" × 13"
  • Dry Weight: ~175 lbs
  • Max Service Flow: 37 GPM
  • Inlet/Outlet Options: 1 1/4" Male Threaded (NPT) or 1 1/4" PVC Glue
  • Pre-Sediment Filter: 30 GPM stainless steel screen (backwashable), 1 1/2" male fittings (for wells only)
  • Operating Temperature: 41 – 100 °F
  • pH Range: 6.5 – 8.5
  • Drain Connection: 3/4" Male Threaded
  • Power Requirements: 110V standard outlet (for electronic head)
  • Backwash Cycle: ~20 minutes, every 3 days, using 40–50 gallons of water

What’s in the Box

  • The AquaOx XL Whole House Water Filter (Made in the USA)
  • High-Capacity Pre-Sediment Filter (30 GPM stainless steel screen)
  • Electronic Automatic Backwashing Head (AquaOx)
  • Step-by-Step Installation Instructions & Diagram
  • 10-Year No-Hassle Warranty
  • 1-Year Money-Back Guarantee*

Installation & Maintenance

Due to the XL’s higher flow capacity and heavier weight, we strongly recommend hiring a licensed professional plumber for installation. The unit connects after your main water shutoff and pressure regulator, with a 3/4" drain for backwash. Once you’ve filled the tank and let the media soak, simply run the initial backwash cycle (approx. 20 minutes), and you’re ready for high-volume, high-performance filtration.

The AquaOx XL automatically backwashes every three days—no manual involvement needed. Check the pre-sediment filter periodically to ensure it’s capturing debris efficiently and not impeding flow. From there, just enjoy some of the cleanest, freshest water your home can have.

Upgrade to The AquaOx XL—the biggest, boldest, and best whole house water filter on the market. Experience unmatched flow rates, unrivaled capacity, and uncompromising water quality for decades. No expense spared. No corners cut. Pure, premium water for every room in your home.

Specifications

Peak flow rate
37 GPM
Media bed life
3,000,000+ gallons
Service rating
5+ bathrooms / sprinkler systems
Tank size
13" × 54"
Media layers
8 (6 media + 2 Vortech plates, largest bed on the market)
Backwash
Automatic, every 5–10 days
Electrical
24V, plug-in
Inlet / outlet
1" NPT
Operating pressure
20–125 PSI
Warranty
10 years (tank & control valve)
What customers say

72 reviews. 4.83 stars.

Real The AquaOx XL customers
★★★★☆
Clean Water, Minor Hiccup
I needed an extra fitting for my old plumbing, but once installed it’s been perfect. Tea and coffee taste brighter.
Frances Diaz · Aug 2025

Response from AquaOx

Frances, older lines sometimes need that extra elbow, thanks for rolling with it. Glad your tea and coffee are shining now.

★★★★★
Superb Quality
From the stainless hardware to the seals, it feels premium. The result in the glass backs it up.
Jason Ford · Aug 2025

Response from AquaOx

Jason, thank you for noticing the details, enjoy that premium feel and clean glassfuls.

★★★★★
Night-and-Day Improvement
Switched from Aquasana; taste is cleaner and there’s no metallic hint. My skin feels less dry after showers.
Naomi Peters · Aug 2025

Response from AquaOx

Naomi, fantastic, cleaner taste and happier skin are exactly the results we love to hear about.

★★★★☆
Great Water, Slightly Pricey
It’s more expensive than some options, but the results are top-notch. No chlorine smell and strong pressure.
Andre Watkins · Jul 2025

Response from AquaOx

Andre, thanks for investing in quality, we’re glad the taste and pressure are delivering. If we can earn that 5th star, let us know how.

★★★★★
Excellent Choice
Compared models from Culligan and Lifesource; AquaOx felt higher quality and the water proves it every day.
Tamara Steele · Jul 2025

Response from AquaOx

Tamara, thanks for doing the homework and choosing us. We’re thrilled the daily taste confirms your decision.

Showing 5 of 72 reviews.

Questions

The AquaOx XL, specifically

The questions we hear most about this exact product.

How long does the media last?

The AquaOx is rated for 2 million+ gallons of filtration, roughly 10 years for the average household. The system self-cleans on a backwash cycle so no annual cartridge swaps.

What does the warranty cover?

10 years, end to end. Both the tank and the control valve are covered for 10 years from the date of purchase. Media is consumable and not covered, and wear items (seals, O-rings, etc.) are excluded.

Do I need a plumber to install it?

Most customers hire a licensed plumber. It takes 2 to 4 hours and runs roughly $300 to $800 depending on your area. You can DIY if you are comfortable cutting into your main water line and routing a drain line.

Will it slow my water pressure?

No. The AquaOx is rated for 15 GPM peak flow, enough for up to 4 bathrooms running at once with no noticeable pressure drop.

Does it work on well water?

Yes. Well installs add a 7th phase, a pre-sediment filter ahead of the tank, so sand and grit do not load up the media bed. For wells with rotten-egg sulfur smell, pair with the RE Edition upstream. For wells with iron staining, pair with the FE Edition upstream. For bacteria, add the UV sterilizer.

How does it compare to a fridge filter or pitcher?

A fridge filter or pitcher treats one tap. The AquaOx treats every tap, every shower, your washing machine, dishwasher, and ice maker. Plus you stop buying replacement cartridges every six months.

Ready to stop drinking your tap water?

The AquaOx XL. Ships within 10 business days. 0% APR financing available.

$4,999 or $208/mo with Affirm

Questions? Call (803) 369-6956 · Real humans, M–F 9–5 ET

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