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Whole house filter

SpringWell CF1 Whole House Water Filter System

CF1 (1–3 bathrooms, 9 GPM, 1-inch connection), base filter system without the bypass valve or the UV and reverse osmosis upgrades

$1,160.25US price, checked Oct 13, 2026

Whole-house carbon and KDF filter for city water in 1–3 bathroom homes

Check price at SpringWell Full review →

Whole house filter

Waterdrop WD-WHF3T-PG 3-Stage Whole House Water Filter System

WD-WHF3T-PG system with its three included cartridges (WD-WF20C, WD-WF20K and WD-WF20P), 15 GPM, single system with no add-ons

$369.99US price, checked Oct 13, 2026

Low-cost three-cartridge whole-house filter for chlorinated water

Check price at Waterdrop Full review →

Criterion	SpringWell CF1 Whole House Water Filter System	Waterdrop WD-WHF3T-PG 3-Stage Whole House Water Filter System
US price	$1,160.25Checked Oct 13, 2026 · Price details in the review	$369.99Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$1,296.96 Incomplete known subtotal. Not included: installation.	$727.11 Incomplete known subtotal. Not included: installation.
Choose if	A 1–3 bathroom city-water home with room for a 52 in tall tank on the main line, where you plan to stay and want chlorine and chloramine treated at every tap.	A home on chlorinated city water where you want whole-house chlorine and sediment reduction at a low upfront cost, without power or a drain line.
Main trade-off	SpringWell names no NSF, WQA or IAPMO certification for any contaminant claim, an installed system can't be returned unless it's defective, and the lifetime warranty ends if you move it.	You'll replace the cartridges about once a year at about $119, the warranty lasts one year, and no contaminant reduction is certified.
Key specifications	Service flow and connection: 9 GPM; 1-inch connection Home size: 1–3 bathrooms Filtration: Up-flow tank of KDF (copper-zinc) and catalytic carbon, then a 5-micron sediment cartridge Media life: 1,000,000 gallons, or 10 years according to the product page and 6 years according to the installation manual Sediment cartridge change: Every 6–9 months, though SpringWell's 10-inch replacement listing says the filter lasts up to 6 months Operating limits: 25–80 PSI; 36–120°F; pH range not given Certification: None named on the product page or in the manual; an NSF listings search for SpringWell returned no products	Flow rate: 15 GPM Filter capacity and life: 100,000 gallons per filter. The WF20PG replacement is rated for up to 12 months Filtration: Three filters, described as KDF composite activated carbon, grooved PP and activated carbon. Marketed as 7-stage filtration, with 5 micron filtration precision in the page's comparison table Published test result: 97.7%, which the system page describes as the initial chlorine filtration result from a third-party lab. The replacement page gives 97.72% chlorine reduction without naming a lab. No NSF/ANSI 42 or 53 performance certification is stated Certification: NSF/ANSI 372 (lead-free materials), per the product page, which doesn't name the certifying body Operating limits: 40–100°F. Waterdrop says the system was tested under 300 PSI and with 100,000 water hammer tests. Operating pressure range not stated Power and drain: None listed
Exact variant	CF1 (1–3 bathrooms, 9 GPM, 1-inch connection), base filter system without the bypass valve or the UV and reverse osmosis upgrades	WD-WHF3T-PG system with its three included cartridges (WD-WF20C, WD-WF20K and WD-WF20P), 15 GPM, single system with no add-ons
Dimensions	The carbon tank is 9 in wide and 48 in tall, or 52 in with the head. The 9 in width is for the tank alone. SpringWell doesn't give the size of the separate sediment housing, the overall installed footprint or the system weight.	The product page lists the product dimensions as 22.91 in L × 8.46 in W × 26.18 in H. It gives the product weight as 42 lb, but doesn't say whether these figures are for the assembled unit or the box. The WF20PG replacement page lists its dimensions as 4.5 × 4.5 × 20 in, without saying whether that's per cartridge. Waterdrop doesn't say how much clearance you need below the housings to change cartridges.
Installation	It must go on a main water supply line, following all applicable plumbing codes. The manual highly recommends a 3-valve bypass around the system, which isn't included. It says a licensed plumber can install one using standard tee fittings and ball valves. The product page also adds a $78.74 bypass valve to the cart by default, which you can remove at checkout. Before installation, the carbon media must soak in water for at least 48 hours. Then you flush the tank until the water runs clear. SpringWell says not to install it on well water without first speaking to customer service. It also says not to use it where water is microbiologically unsafe. SpringWell lists no electrical connection.	It connects to the main water line, and Waterdrop says it's built for both well and municipal water. The product page says "no plumber needed" and that installation "can be done in minutes". The system still has to be plumbed into the main supply, though. The product page doesn't mention a bypass valve or mounting hardware. It also doesn't give the inlet and outlet connection size or the operating pressure range. No electrical or drain connection is listed.
Materials	The up-flow tank holds a bed of KDF copper-zinc alloy and catalytic carbon. The 2020 installation manual describes coconut catalytic carbon and doesn't mention KDF. After the tank, water passes through a 5-micron sediment cartridge in a separate housing with mount. The kit includes the carbon filter tank, tank head, sediment housing and filter, MNPT fittings, spanner wrench, gasket and lube, and a hose bib. SpringWell doesn't say what the tank and housing are made of.	It's a three-stage system, and the in-the-box list names three cartridges: WD-WF20C, WD-WF20K and WD-WF20P. The page describes the filters as a KDF composite activated carbon filter, an upgraded grooved PP (polypropylene) filter and an advanced activated carbon filter. The listing title calls them carbon and sediment filters. The page doesn't say which model number is which. It lists NSF/ANSI 372 certification for lead-free materials but doesn't name the certifying body. Waterdrop doesn't say what the housings are made of.
Warranty	SpringWell gives a lifetime warranty against defects in material and workmanship on covered items, starting on delivery. It covers the registered owner who owns or lives in the home where the system was first installed. The warranty is void if the system is removed from its original location. The covered-parts clause names fittings, "FutureSoft media", tanks, housings, bypass, valves and in/out heads. It doesn't name the CF1's KDF or carbon media. Exclusions include freezing, fire, misuse and neglect, such as not replacing filters or media on time. Plumber fees aren't covered, and liability is capped at the product's cost. On a private well, the water must be free of hydrogen sulfide and oils, with copper at or below 1.30 mg/L. SpringWell says iron or manganese will oxidize the media. A separate performance guarantee says SpringWell's carbon can reduce chlorine and chloramine below minimum detection levels for 6 years or 1 million gallons.	The product page gives a one-year warranty covering manufacturing defects. Waterdrop's service policy says to email service@waterdropfilter.com with the order information and a picture of the damaged or incorrect product. To exchange a defective product, you need to contact customer service within 30 days of receipt. For covered defects, Waterdrop can accept a free return, repair the product or send a replacement. The policy's general warranty section gives terms only for RO systems and says coverage varies by model. The policy's separate extended-warranty terms apply only to purchases from Waterdrop's US website. They exclude filters as consumables and damage from non-municipal water such as well water. They list municipal tap water as the water source and say well water requires pre-filtration. They also ask owners to report defects within 30 days of discovery. The policy doesn't say whether those conditions also apply to this system's standard one-year warranty. That matters, because the product page markets the system for well water.
Returns	You can return unused, uninstalled SpringWell items in undamaged original packaging within 6 months of purchase. You pay return shipping, and original shipping isn't refunded. Approved non-defective returns carry a 10% restocking fee. It can be up to 25% for refused deliveries or returns that need extra handling. Installed systems can't be returned unless SpringWell finds them defective. The product page advertises a "6-month money-back guarantee". The policy page instead describes a 6-month Performance Promise focused on service resolution rather than full refunds for installed systems. Under the Performance Promise, SpringWell pays for defective product returns and refunds them in full, excluding installation-related costs. Report defective or faulty items to customer support within 30 days of delivery to request an exchange. Claims for damaged or lost small-package shipments are due within 10 days of delivery. Freight damage must be noted on the delivery receipt.	The product page advertises 30-day returns. The service policy counts the 30 days from receipt and limits the 30-day policy to orders within the continental United States. Returned items must be disassembled and repackaged as received, in the original packaging with the original receipt. They must be damage-free unless defective. There's no restocking fee within 30 days, but you pay return shipping unless the return is for a quality issue. After 30 days, returns carry a 10% restocking fee, and return shipping is deducted from the refund. Items not returned in "like new" condition also carry the 10% fee. Orders from Amazon and other third-party sellers aren't covered. The policy doesn't say whether you can return an installed system.
Unresolved questions	Whether to replace the media at 6 or 10 years, since the product page and manual disagree System weight, sediment-housing size, overall installed footprint and tank material Replacement media price Plumber cost for main-line installation and a 3-valve bypass How much pressure the CF1 loses at full flow, since SpringWell claims no pressure drop but publishes no figure Independent lab data for the PFAS, PFOA, PFOS, heavy-metal and pesticide claims Which sediment cartridge size the current CF1 ships with (the 10-inch replacement listing names the CF1 as compatible, but says systems bought before April 2019 most likely need the 20-inch filter) Operating pH range Whether the lifetime warranty covers the KDF and carbon media, since the covered-parts clause names "FutureSoft media" instead	Installed cost, including fittings, bypass and any plumber labor Inlet and outlet connection size and operating pressure range Whether the $119.04 WF20PG replacement includes all three cartridges Which lab ran the chlorine test, at what flow and challenge level, and how well reduction holds up after the initial result How it performs on chloramine, lead, PFAS or other contaminants Which of WD-WF20C, WD-WF20K and WD-WF20P is the KDF, PP and carbon stage, and the micron rating of each Whether the well-water exclusion in the extended-warranty terms applies to the standard one-year warranty Whether an installed system qualifies for the 30-day return Which body certifies the NSF/ANSI 372 claim, since no WD-WHF3T or WF20 model appeared in NSF's drinking water treatment unit or system component listings for the Waterdrop trade name on Oct 13, 2026

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.