SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Whole house filter
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, checkedWhole-house carbon and KDF filter for city water in 1–3 bathroom homes
Check price at SpringWell for SpringWell CF1 Whole House Water Filter System Full review →
Whole house filter
WGB32B base model: 3 stages, 20 in × 4.5 in cartridges (5-micron PP sediment plus two CTO coconut-shell carbon blocks), 1-inch female NPT, 15 GPM. Not the WGB32BM, WGB32B-PB or WGB32B-KS versions iSpring points to for iron, lead and other metals
$516.99US price, checkedThree-cartridge whole-house filter for chlorine and sediment at up to 15 GPM
Check price at iSpring for iSpring WGB32B Whole House Water Filter System Full review →
Whole house filter
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, checkedLow-cost three-cartridge whole-house filter for chlorinated water
Check price at Waterdrop for Waterdrop WD-WHF3T-PG 3-Stage Whole House Water Filter System Full review →Scroll the table sideways to see every product.
| Criterion | SpringWell CF1 Whole House Water Filter System | iSpring WGB32B 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 | $516.99Checked 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. | $894.96 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 city-water home on chlorine, not chloramine, with 1-inch plumbing and an indoor main-line spot, that wants chlorine, taste, odor and sediment reduced at every tap at high flow. | 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. | No NSF/ANSI standard is named for its contaminant claims, the warranty is one year with registration, and a $125.99 cartridge set is listed for replacement every 6–12 months. | You'll replace the cartridges about once a year at about $119, the warranty lasts one year, and no contaminant reduction is certified. |
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| 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 | WGB32B base model: 3 stages, 20 in × 4.5 in cartridges (5-micron PP sediment plus two CTO coconut-shell carbon blocks), 1-inch female NPT, 15 GPM. Not the WGB32BM, WGB32B-PB or WGB32B-KS versions iSpring points to for iron, lead and other metals | 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 "Product Dimensions" of 24.5 in L × 8.0 in W × 28.0 in H and a "Product Weight" of 60.0 lb. It doesn't say whether these figures are for the assembled unit or the shipping box, or which dimension runs along the wall. | 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 goes on the main water line where it enters the house, before the line branches to the water heater or other plumbing. The inlet and outlet ports are 1-inch female NPT. iSpring says to install it indoors in a well-ventilated area, protected from wind, rain, direct sunlight, heat and freezing. It advises against installing it outdoors. An outdoor install, it says, would need insulation against frost and sun, and waterproofing for the unit and pipes. It also advises against filtering hot water, which it says can damage the carbon blocks. The operating range is 40–100°F, and feed pressure must be 25–80 psi. Water flows right to left. For left-to-right plumbing, you flip the head. iSpring describes installation as DIY for someone with some plumbing knowledge and supplies a manual and video guide. No storage tank is required, and no electrical connection is listed. The warranty doesn't cover installation cost. | 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. | Stage 1 is a 5-micron polypropylene (PP) sediment cartridge (FP25B). Stages 2 and 3 are FC25B carbon blocks made from coconut-shell carbon, which the replacement pack calls CTO coconut-shell carbon blocks. Each cartridge is individually wrapped. iSpring doesn't state the housing, head or bracket materials or give a full list of box contents. | 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 limited warranty runs one year from the date of purchase and covers defects in materials and workmanship. It applies to end users who bought from an authorized iSpring dealer or reseller and who register at ispringfilter.com. A repaired or replaced product is covered for the rest of the original term or 6 months, whichever is longer. Defects from accidents or from improper installation, maintenance, repair or use are excluded. So is the cost of installing or reinstalling the system. iSpring says it bears the cost of defective products sent back. Customers in Hawaii, Alaska, Puerto Rico and outside the US pay shipping costs, though. The product page also shows a "Lifetime Tech Support" badge and says registering online activates an "extended warranty". It links to an extended-warranty collection, but the pages reviewed don't give that warranty's length or terms. | 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. | Within 30 calendar days of purchase, unopened, unused items in original packaging get a full refund. Open-box items returned in that window get a refund minus a 15% restocking fee. To qualify, they must be unused, undamaged, not defective, complete with all parts and in good working order. After 30 days, refunds fall on a sliding scale. Unopened items get 85% back at 1–3 months, 65% at 3–6 months and 50% at 6–12 months. Open-box items get 70% at 1–3 months and 50% at 3–6 months. Unopened items after 12 months and open-box items after 6 months aren't eligible. You pay return shipping unless the product is defective. Defective products are fully refunded after inspection, and iSpring provides a prepaid label on request. Customers in Hawaii, Alaska, Puerto Rico and outside the US pay shipping. Every return is inspected and approved before a refund is issued. | 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. |
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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.