SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Our whole-house pick for chlorinated city water
Standard Rhino (model WH-1000), 1,000,000 gallons or 10 years, no add-ons
$999US price, checkedNo-power carbon and KDF whole-house tank for chlorinated city water
Check price at Aquasana for Aquasana Rhino Whole House Water Filter 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 | Aquasana Rhino Whole House Water Filter | iSpring WGB32B Whole House Water Filter System | Waterdrop WD-WHF3T-PG 3-Stage Whole House Water Filter System |
|---|---|---|---|
| US price | $999Checked 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 | $1,442.88 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 home with up to 2.5 bathrooms on chlorinated city water that wants whole-house chlorine reduction with no electricity, drain line or backflushing. | 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 | Aquasana publishes test data only for free chlorine, the pre-filter needs changing every two months, and the recommended plumber and extra valves aren't priced. | 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 | Standard Rhino (model WH-1000), 1,000,000 gallons or 10 years, no add-ons | 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 base unit is 46 in tall with a 9 in diameter, according to the product page's size chart. The chart's length entry says "Please see chart below" instead of giving a number. The owner's manual says to allow at least 50 in of height clearance for the tank and at least 44 in of floor space. Aquasana doesn't state the weight or the assembled footprint. | 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 goes where the main water line enters the home, before the water heater, on cold-water lines only. It fits 3/4 in or 1 in main lines. Aquasana strongly recommends a licensed plumber. The manual says some local codes may require one and that installation could take 1 to 4 hours. Where pressure is high (for example above 60 psi), the manual recommends a pressure-reducing valve or regulator. It also recommends water hammer arrestors at the beginning and end of the system. It strongly recommends a check valve at the end of the system, before the water heater. On metallic plumbing, it says two grounding clamps and #4 copper wire are essential. Neither is in the kit's parts list. The manual recommends an indoor spot out of direct sunlight. Outdoors, the unit must be protected from sunlight and freezing. The tank must stand upright and be flushed before water enters the house. No electricity, drain line or backflushing is needed. The manual lists the Pro-Grade Bypass Kit (for 1 in PEX connections) among recommended tools, but it's a separate add-on and isn't included with the base unit. | 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 tank is molded from food-grade HDTE (high density, tri-extruded) material. Aquasana says it's WQA certified to NSF/ANSI/CAN 61, for materials safety only. The data sheet adds CSA B483.1 for materials safety and structural integrity. The media is copper-zinc (KDF) in the top section and activated carbon in the bottom section. Aquasana doesn't say what form the carbon takes. The assembly kit uses Schedule 80 PVC components, a 1 in PVC shut-off valve and a 1/2 in brass drain valve. | 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 | The Rhino WH-1000 system has a limited warranty of 10 years or 1,000,000 gallons against defects in materials or workmanship. The installation kit bought with the system and the pre- and post-filter housings get 12 months. Coverage applies only if the system is installed, operated and maintained according to the instructions. Filter cartridges aren't covered. Neither is damage from non-genuine parts, a filter moved from its original installation location, clogging from not replacing the pre-filter, iron or sediment build-up, misuse, freezing, direct sunlight, over-pressurization, or fire and flood. The warranty applies only to products bought from authorized Aquasana resellers. The document also notes that water conditions and use rates may limit the filter's functional lifespan. You need proof of purchase, but you don't need to register. The remedy is replacement of the defective part, or a replacement that covers the remaining estimated life. You pay labor plus all freight, shipping and handling, including returning the defective unit. | 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 | Aquasana's 90-Day Satisfaction Guarantee covers products bought directly from Aquasana. Returns are accepted within 90 calendar days of the order date, with prior authorization and a Return Authorization Code. The return must reach Aquasana within 21 calendar days of the code being issued. Filtration systems go back as complete units, and partial returns aren't accepted. You pay return shipping and insurance. The refund is the purchase price, excluding shipping and handling. It goes to the original payment method within 15 business days of receipt. The policy mentions no restocking fee and doesn't say whether an installed system can be returned. | 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.