SpringWell vs Aquasana Whole House Filters

SpringWell’s CF1 and Aquasana’s Rhino both target chlorine, taste and sediment on city water, and both put KDF in the media. They are not interchangeable, though. The brands list flow in different ways, name different certifications, and set different filter schedules and warranty terms. This comparison is based on the brands’ published specifications, not on our own testing of either unit. If you want a certificate to show for chlorine, the Aquasana Rhino is the one to start with, at $1,998.

The short answer

Start with bathroom count and flow. A home with one to three bathrooms that runs about 9 GPM at peak fits the SpringWell CF1 range. If you want a named NSF/ANSI 42 test for chlorine on the brand page, the Aquasana Rhino gives you that. If your utility uses chloramine, the Rhino Chloramines is the model the brand tests for that job, while SpringWell’s page names no test. Neither system softens water, and neither is a complete answer for untested well water.

Side by side

Both brands run promotions, so check the current figure. SpringWell shows a “starting at” price during a sitewide sale.

Feature	SpringWell CF1	Aquasana Rhino (WH-1000)
Price	From $1,092 for the CF series (size not stated)	$1,998
Listed flow	9 GPM, type not stated	7.0 GPM rated, 14.6 GPM peak
Sizing	1 to 3 bathrooms	No bathroom range listed
Design	Single media tank, upflow	Dual tank, upflow: pre-filter, carbon, KDF, post-filter
Media	KDF, catalytic carbon, 5-micron sediment after the tank	Pre-filter, activated carbon, copper-zinc KDF, post-filter
Connection	1 inch	Fits 3/4-inch or 1-inch mains
Pressure	25 to 80 PSI	Up to 100 PSI
Water temperature	36 to 120 F	40 to 90 F
Media life	10 years or 1,000,000 gallons (brand figure)	1,000,000 gallons or 10 years, whichever comes first
Pre-filter	Every 6 to 9 months	Every 2 months standard, every 6 months low-maintenance option
Post-filter	Not listed	Every 6 months
Named certification	None on the page	Tested to NSF/ANSI 42 for chlorine; tank WQA certified to NSF/ANSI/CAN 61
Chloramine	Catalytic carbon; no test named	Separate Rhino Chloramines model, tested to NSF/ANSI 42 for up to 83% chloramine
PFAS	Brand claim; no certification on the page	No PFAS claim on the Rhino page
Warranty	Lifetime against defects in covered parts, with conditions	10-year limited
Guarantee	6-month money-back for unused, uninstalled units, 10% restocking fee	90-day satisfaction guarantee
Softening	No	No
Bacteria	Not for microbiologically unsafe water	Not addressed by the base unit; UV add-on needed for well water

Flow ratings are not like for like

This is the most common mistake in comparing these two. SpringWell lists one number for the CF1 without saying whether it is service or peak. Aquasana lists two numbers for the Rhino: 7.0 GPM rated and 14.6 GPM peak. A 9 GPM figure is not directly comparable with a 14.6 GPM peak.

To compare the two, time your own peak. Time a faucet filling a one-gallon bucket and divide 60 by the seconds, then add the fixtures you run together. A common rule of thumb is about 7 to 10 GPM for two or three bathrooms and 12 GPM or more for four or more. Then ask SpringWell what its figure means before you decide, or run your fixtures through the flow rate calculator.

Media and certification claims

Both systems use KDF, which the brands describe as helping reduce chlorine and heavy metals and slowing bacteria in the bed. SpringWell makes chlorine and chloramine claims for the CF line. Aquasana’s standard Rhino makes a chlorine claim, and chloramine is covered by the separate Rhino Chloramines model. The difference is in how those claims are backed.

Aquasana names a test standard: the standard Rhino is tested to NSF/ANSI 42 for up to 97% chlorine reduction, and the chloramine model is tested for up to 83% chloramine reduction. SpringWell’s CF page lists chlorine, chloramine, PFAS and heavy metals as claims, with no NSF or WQA certification named. Neither brand names a PFAS certification.

Check any claim against the exact model in the NSF or WQA database. A test on a brand page is not the same as a certification listing. EPA’s 2024 PFAS rule sets 4 parts per trillion for PFOA and PFOS in public water systems, and private wells are outside that rule.

Filter life and upkeep

The SpringWell CF1 needs its 5-micron sediment pre-filter changed every 6 to 9 months, and its media is rated for 10 years or 1,000,000 gallons. That works out to about one or two pre-filter changes a year.

The Rhino’s standard pre-filter is listed every 2 months, which is about six changes a year. The low-maintenance pre-filter is listed every 6 months, which is two a year, and it is sold as an upgrade. The post-filter is listed every 6 months. The tank is rated for 1,000,000 gallons or 10 years.

Water quality and water use change these numbers, and University of Georgia Extension notes that six months is a common planning interval for carbon cartridges. Aquasana sells the low-maintenance pre-filter as a $348 upgrade. Ask SpringWell for its cartridge prices before you compare running costs, and see the cost guide for the wider picture.

Warranty and guarantee terms

SpringWell’s warranty covers defects in listed parts for life, with conditions. Its 10-year tank warranty applies only to tanks 14 inches or larger, which excludes the CF1’s 9-inch tank. Its return window is 6 months for unused, uninstalled units with a 10% restocking fee, and installed systems are not returnable unless defective.

Aquasana’s Rhino has a 10-year limited warranty and a 90-day satisfaction guarantee. Read the full guarantee terms on the brand’s site, because the conditions after installation decide what a return would involve. The SpringWell and Aquasana terms are not built the same way, so compare them line by line.

Which one for which home

• 1 to 3 bathrooms, chlorine taste, city water: the SpringWell CF1 is in the right size range. Confirm whether 9 GPM is service or peak.
• Chloramine utility: the Aquasana Rhino Chloramines has a named test for that job. Ask SpringWell for a test on the CF model before you rely on its chloramine claim.
• Need a named chlorine test on the brand page: the Aquasana Rhino gives you a named NSF/ANSI 42 claim for the standard and chloramine models.
• Four or more bathrooms: SpringWell’s CF4 and CF+ are sized for larger homes, and the Rhino’s 14.6 GPM peak is a different kind of number from SpringWell’s, so compare with your own peak measurement.
• Well water: neither system is a complete answer. The CF page says not to use it where water is microbiologically unsafe, and the Rhino needs a UV add-on for bacteria. Test first, using the well water testing guide.

Who should skip both

• Anyone who needs hardness removed. Neither system softens water. Carbon does not remove calcium and magnesium.
• Anyone who needs a certified PFAS or lead reduction without a listing for the exact model.
• Homes with iron or sulfur above the ratings. Both brands say iron and related problems need the right step before the filter.
• Untested well owners. A carbon-based filter is not a substitute for a test and a treatment plan built on the results.

Next steps

For the full set of options, read the best whole house water filter guide. If one brand looks close, the SpringWell CF1 review and the Aquasana Rhino review cover each model in more detail.