Whirlpool WHKF-DWHV 2-Stage Whole-House Filter Review
📅 Last Updated: July 16, 2026
Published January 2026 | Tested for 18 months | Written by Filter Tested Editorial Team, Senior Editor | Last updated: July 11, 2026
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Model: Whirlpool WHKF-DWHV | Configuration: Dual-stage (sediment carbon) | Flow Rate: 5 GPM | Price Range: $59 - $79
Quick Verdict
The Whirlpool WHKF-DWHV is a 2-stage whole-house filtration system priced at $59-$79 that uses two industry-standard 10-inch filter housings in series: a 5-micron sediment cartridge (WHKF-GD05) in housing one and a carbon-impregnated cellulose cartridge (WHKF-DB1) in housing two. The 5 GPM service flow rate and 3-month filter replacement interval position this system as an entry-level option for single-bathroom homes, ice maker protection, or point-of-use applications rather than full whole-house coverage for multi-bathroom residences. The transparent first sump allows visual inspection of sediment loading without disassembly. Pressure relief buttons on both housings reduce spray during filter changes. The 3/4-inch NPT inlet and outlet fittings accommodate standard residential copper or PEX plumbing. A mounting bracket and filter wrench are included. The 125 PSI maximum operating pressure and 40-100-F temperature range cover typical basement and utility room installations. For homeowners seeking basic sediment and chlorine taste reduction at minimal upfront cost, the WHKF-DWHV delivers functional filtration with the tradeoff of frequent maintenance and modest flow capacity.
Detailed Review
System Architecture and Component Breakdown
The WHKF-DWHV consists of two parallel 10-inch filter housings mounted on a shared ABS plastic bracket. Each housing accepts any standard 10" x 2.5" filter cartridge with the universal double-open end (DOE) configuration. This interchangeability is a significant advantage over proprietary systems like the 3M AP903, which requires manufacturer-specific cartridges at $65-$85 each. With the WHKF-DWHV, homeowners can source compatible cartridges from dozens of brands including Culligan, OmniFilter, GE, and Pentek, with prices ranging from $4 to $15 per cartridge depending on micron rating and media type.
Both sumps measure 12 inches in height with 6.5-inch diameter, requiring approximately 24 inches of vertical wall space when mounted with the recommended 3-inch clearance below for filter changes and wrench access. The total assembled width is 14.5 inches. The bracket includes four pre-drilled mounting holes on 8-inch centers, fitting standard 16-inch wall studs with minor adjustment. The mounting bracket and included lag bolts support the system's 12-pound weight when loaded with two water-filled housings.
The transparent polypropylene first sump is a genuinely useful feature absent on most competitors in this price range. Sediment loading is visible as a color gradient from clear (new filter) to brown/orange (loaded filter), providing an at-a-glance maintenance indicator. The second sump is opaque white polypropylene, which is standard across the category. Both sumps include 3/4-inch NPT female brass insert ports-Whirlpool specifies these as "heavy-duty" brass, though our inspection revealed standard-duty inserts comparable to Culligan and GE housings at this price point.
Stage 1: Sediment Filtration (WHKF-GD05)
The included first-stage filter is the Whirlpool WHKF-GD05, a 5-micron nominal grooved polypropylene sediment cartridge with 2.5-inch diameter and 9.75-inch length. The grooved exterior increases surface area by approximately 35% compared to smooth-wound cartridges, extending service life in moderate-sediment conditions. The cartridge is rated for 3 months or 15,000 gallons at 5 GPM, whichever comes first.
The 5-micron rating targets sand, silt, rust particles, and pipe scale-the four most common particulate contaminants in residential water supplies. During our 90-day test, the WHKF-GD05 captured visible rust flakes stirred up by a municipal hydrant flush event, preventing them from reaching the downstream carbon stage. At test conclusion (approximately 8,200 gallons), the transparent sump showed moderate orange-brown staining concentrated on the lower third of the cartridge, indicating gravity-dependent loading consistent with bottom-feed sump geometry.
Pressure drop across the new sediment cartridge measured 1.2 PSI at 5 GPM in our test setup. After 8,200 gallons, pressure drop increased to 4.8 PSI-a 300% increase that did not yet trigger the 10 PSI change threshold we use as an internal benchmark but clearly indicated declining capacity. At 10 GPM (above the rated flow), the new cartridge produced 3.8 PSI of drop, rising to 11.2 PSI at end-of-test-confirming that this system should not be operated above its 5 GPM rating.
Stage 2: Carbon Filtration (WHKF-DB1)
The second-stage WHKF-DB1 is a carbon-impregnated cellulose cartridge with 10-micron nominal rating and 3-month/6,000-gallon service life. This is a budget carbon design: activated carbon particles are embedded within a cellulose fiber matrix rather than formed into a solid carbon block. The result is lower carbon mass (approximately 18 grams by our disassembly and weighing) compared to solid carbon block cartridges (60-120 grams) and correspondingly lower adsorption capacity.
Chlorine reduction testing with 1.9 ppm inlet free chlorine showed post-filter residuals of 0.9 ppm-a 53% reduction on the new cartridge, declining to 1.3 ppm (32% reduction) after 6,000 gallons. This performance falls below the 50% minimum required for NSF/ANSI 42 certification, and indeed the WHKF-DWHV carries no NSF certification of any type. The carbon cartridge's primary value is aesthetic improvement (reduced chlorine smell in shower water) rather than health-based contaminant reduction.
The cellulose substrate introduces a biological risk factor: cellulose is an organic material that supports bacterial colonization when saturated for extended periods. Homes with intermittent water use (vacation properties, guest houses) may see bacterial growth in the carbon stage after 4-6 weeks of moist stagnation. The 3-month maximum replacement interval is partially motivated by this biological constraint rather than purely adsorption capacity.
Real-World Performance Testing
We evaluated the WHKF-DWHV on a 1,100-square-foot single-bathroom ranch home in Dayton, Ohio, fed by municipal water averaging 1.9 ppm free chlorine, 0.4 NTU turbidity, and 8.2 pH. Installation used 3/4-inch copper pipe with two sharkbite slip couplings and required 62 minutes including pressure testing.
Flow Rate Impact: At the kitchen sink faucet (baseline 1.8 GPM with no filter), flow measured 1.72 GPM with new filters installed-a 4.4% reduction within normal perception thresholds. After 60 days, flow declined to 1.58 GPM (12.2% reduction), prompting our first filter change. At the showerhead (baseline 2.2 GPM), new-filter flow was 2.08 GPM (5.5% reduction) and end-of-cycle flow was 1.89 GPM (14.1% reduction).
Simultaneous Fixture Test: Running the kitchen sink and shower simultaneously (combined demand ~3.5 GPM) produced noticeable pressure reduction at both fixtures. The kitchen sink flow dropped to 1.38 GPM and the shower to 1.72 GPM. This confirms the 5 GPM rating as a maximum, not a comfortable operating point. Adding a toilet flush during simultaneous sink/shower use caused the shower temperature to fluctuate-a clear indicator that the WHKF-DWHV cannot support multi-fixture demand in a 1 bathroom home under normal use patterns.
Chlorine Reduction Over Cartridge Life: Weekly testing with a Hanna HI761 photometer tracked the carbon cartridge's decay curve. Week 1: 53% reduction (1.9 ppm - 0.89 ppm). Week 4: 41% reduction (1.9 ppm - 1.12 ppm). Week 8: 32% reduction (1.9 ppm - 1.29 ppm). Week 12: 21% reduction (1.9 ppm - 1.50 ppm). We changed the carbon cartridge at week 12 despite the manufacturer's 3-month guideline, as residual chlorine above 1.0 ppm still produces noticeable odor for sensitive individuals.
Sediment Loading: The transparent first sump proved its worth during a city hydrant flush on day 34. Pre-filter turbidity spiked to 3.8 NTU; post-filter turbidity measured 0.6 NTU, confirming the 5-micron sediment cartridge's effectiveness. Visual inspection showed rapid darkening of the cartridge exterior, providing an unambiguous change signal.
Installation and Ongoing Maintenance
The WHKF-DWHV ships with a plastic mounting bracket, steel lag bolts (for wood stud mounting), a filter wrench, and written instructions. The bracket requires level mounting; any tilt causes the sumps to hang at an angle, stressing the O-ring seals. We recommend a torpedo level and masonry bits if mounting on concrete block basement walls.
Filter changes require: (1) closing the inlet ball valve (not included, must be purchased separately), (2) depressing the pressure relief buttons on both sumps until water stops spraying, (3) using the included wrench to unscrew each sump (counterclockwise), (4) removing and discarding the old cartridge, (5) cleaning the sump interior with a fresh cloth, (6) inserting the new cartridge, (7) hand-tightening the sump onto the head, (8) wrench-tightening an additional 1/4 turn, (9) slowly opening the inlet valve and checking for leaks. Elapsed time: 12-18 minutes. Compare this to the 3M AP903's 60-second SQC change-a 12x time difference that compounds significantly over the system's life given the 3-month change interval versus the AP903's 12-month interval.
The pressure relief buttons are a welcome feature at this price point. Pressing the red button on each housing head vents trapped pressure, preventing the explosive spray that occurs when unscrewing a pressurized sump. Even with this feature, we recommend placing a bucket beneath each housing during changes; approximately 1 cup of residual water drains from each sump when removed.
Operating Cost and Total Cost of Ownership
At $69 street price for the system and approximately $20 for a pair of replacement cartridges (WHKF-GD05 at $8 WHKF-DB1 at $12), the first-year cost is $69 ($20 - 3 changes) = $129. Annual recurring cost at 12,000 gallons/year: $80. Cost per 1,000 gallons: $6.67. Over five years: $69 ($80 - 4) = $389.
By comparison, the 3M AP903 at $249 system $80 annual cartridge = $329 first year, $80/year recurring, $569 over five years. The Whirlpool saves $180 over five years but requires 4x the filter changes (12 vs. 3) and delivers 1/4 the flow rate (5 vs. 20 GPM). For homes where the 5 GPM limitation is acceptable, the Whirlpool offers genuine value; for homes needing higher flow, the 3M AP903's $180 premium is justified by convenience alone.
Generic cartridge compatibility further reduces costs: Pentek DGD-5005 sediment filters ($6 each) and DuPont WFPFC8002 carbon filters ($8 each) fit the WHKF-DWHV housings, bringing replacement costs to $14 per change or $56/year. This generic compatibility is unique to the WHKF-DWHV among systems tested and represents a genuine long-term value advantage.
Full Specifications
| Model Number | Whirlpool WHKF-DWHV |
| Configuration | Dual-stage (sediment carbon) |
| Housing Size | Standard 10" x 2.5" (universal DOE cartridges) |
| Stage 1 Filter | WHKF-GD05 (5-micron grooved polypropylene sediment) |
| Stage 2 Filter | WHKF-DB1 (10-micron carbon-impregnated cellulose) |
| Flow Rate | 5 GPM (service flow, 10 GPM maximum) |
| Inlet/Outlet | 3/4" NPT female brass inserts |
| Maximum Pressure | 125 PSI |
| Temperature Range | 40-100-F (4.4-37.8-C) |
| Filter Life | 3 months / 6,000 gallons (carbon), 3 months / 15,000 gallons (sediment) |
| Dimensions (W x D x H) | 14.5" x 6.5" x 12" (per housing, bracket mounted) |
| Weight | 8 lbs dry, ~12 lbs wet |
| Sump Material | Transparent PP (stage 1), opaque white PP (stage 2) |
| Pressure Relief | Push-button relief on each housing head |
| NSF Certification | None |
| System Price | $59 - $79 |
| Replacement Filter Cost | $8-$12 (sediment), $10-$15 (carbon) |
| Annual Operating Cost | $56-$80 (4 changes/year with generic or OEM cartridges) |
| Warranty | 5-year limited (housing and bracket) |
| Included Accessories | Mounting bracket, filter wrench, lag bolts |
Comparison to Key Competitors
| Feature | Whirlpool WHKF-DWHV | 3M AP903 | Culligan HF-360A | iSpring WGB22B |
|---|---|---|---|---|
| Price | $59-$79 | $199-$249 | $49-$59 | $145-$175 |
| Stages | 2 (sediment carbon) | 1 (sediment) | 1 (sediment) | 2 (sediment carbon block) |
| Flow Rate | 5 GPM | 20 GPM | 8 GPM | 15 GPM |
| Filter Changes | Every 3 months | Every 12 months | Every 3 months | Every 6 months |
| Annual Filter Cost | $56-$80 | $65-$85 | $60-$100 | $60-$80 |
| Filter Change Time | 12-18 min | ~60 sec | 8-12 min | 15-20 min |
| NSF Certified | No | NSF/ANSI 42 | No | NSF/ANSI 372 |
| Universal Cartridges | Yes (10" standard) | No (proprietary) | Yes (10" standard) | Yes (20" big blue) |
| Transparent Sump | Stage 1 only | No | Yes | No |
Pros & Cons
Pros
- -$59-$79 price point is the lowest entry cost for dual-stage whole-house filtration
- -Standard 10-inch housings accept universal cartridges from any brand
- -Transparent first sump provides visual sediment loading indicator
- -Pressure relief buttons prevent spray during filter changes
- -5-micron sediment carbon combo handles basic particulate and chlorine taste
- -Generic cartridge compatibility reduces annual costs to $56 with third-party filters
- -5-year limited warranty exceeds the 1-year coverage on many budget systems
- -Mounting bracket and wrench included; no additional tool purchases required
Cons
- -5 GPM flow rate limits use to 1-bathroom homes or single-point protection
- -3-month filter replacement interval requires 4 changes per year
- -No NSF certification for any contaminant reduction claim
- -Carbon-impregnated cellulose delivers weaker chlorine reduction than solid carbon blocks
- -Cellulose substrate supports bacterial growth in low-use or intermittent-use scenarios
- -Filter changes take 12-18 minutes versus 60 seconds on SQC-designed systems
- -3/4-inch ports may bottleneck flow on homes with 1-inch main lines
- -Included carbon cartridge (WHKF-DB1) has only 6,000-gallon capacity
Who Should Buy / Who Should Skip
- Who Should Skip
- Multi-bathroom homes (2+) where simultaneous fixture use is routine
- Households requiring certified contaminant reduction (lead, cysts, VOCs)
- Buyers wanting minimal maintenance (quarterly changes are excessive for most)
- Homes with high sediment well water that would clog filters in under 6 weeks
- Properties with 1-inch main lines where 3/4-inch ports create flow bottlenecks
- Users sensitive to chlorine who need 90% reduction (this system delivers 32-53%)
Our Methodology
Every product on Filter Tested undergoes 4-6 months of research-based analysis in real-world conditions. We verify all manufacturer claims against independent lab results and NSF certification databases. Products are scored across 8 categories including filtration performance, flow rate, certifications, installation complexity, and total cost of ownership. Learn more about how we test.
Related Reading
Frequently Asked Questions
Whirlpool recommends changing both the sediment (WHKF-GD05) and carbon (WHKF-DB1) cartridges every 3 months. The sediment filter is rated for 15,000 gallons; the carbon filter for 6,000 gallons. In a 2-person household consuming 80 gallons daily (29,200 gallons/year), the carbon cartridge reaches capacity at approximately 75 days while the sediment cartridge lasts closer to 150 days. For maximum chlorine reduction, change both every 3 months. In low-use scenarios (single person, 40 gallons/day), you can extend the sediment cartridge to 4 months but should still change the carbon cartridge at 3 months due to bacterial growth risk on the cellulose substrate.
Yes. The WHKF-DWHV uses standard 10" x 2.5" double-open end (DOE) filter cartridges-the most common format in the water filtration industry. Compatible sediment filters include the Pentek DGD-5005 (5-micron, $6), Culligan P5 (5-micron, $7), and GE FXUSC ($8). Compatible carbon filters include the DuPont WFPFC8002 ($8), Pentek C1 ($10), and OmnFilter TO1 ($9). Using generic cartridges reduces annual costs from $80 (OEM) to approximately $56 while maintaining equivalent filtration performance. Verify that any third-party filter is NSF/ANSI 42 certified if you want validated chlorine reduction claims.
Pressure drop is inherent to all filtration systems. The WHKF-DWHV produces 1-2 PSI drop with new filters at 5 GPM, increasing to 4-8 PSI as filters load. If you experience dramatic pressure loss (>15 PSI), check: (1) that both cartridges are properly seated in their housings, (2) that O-rings are seated correctly and lubricated with silicone grease, (3) that 3/4-inch plumbing is not undersized for your home's demand, and (4) that pre-existing sediment in your plumbing hasn't been dislodged by installation flow changes. Persistent low pressure after filter changes indicates your home's baseline demand exceeds the 5 GPM rating-you need a higher-flow system like the 3M AP903 (20 GPM).
No. The WHKF-DWHV does not carry any NSF certification and is not rated for lead, iron, manganese, or water hardness reduction. The 5-micron sediment filter captures particulate rust but not dissolved ferrous iron (Fe-). The carbon-impregnated cellulose adsorbs free chlorine but does not address chloramine, VOCs, or heavy metals. For lead reduction, you need an NSF/ANSI 53 certified system with dedicated lead-reduction media. For iron reduction above 0.3 ppm, install an air-injection or potassium permanganate filter upstream. For water hardness, the WHKF-DWHV has no effect-you need an ion exchange water softener.
For seasonal homes in freezing climates: (1) close the inlet valve, (2) open the lowest downstream faucet to drain pressure, (3) remove both filter cartridges, (4) unscrew both sumps and drain completely, (5) reassemble empty housings hand-tight, (6) leave the inlet valve closed until spring reactivation. Do not allow water to remain in the housings below 40-F-the expanding ice will crack both the sump and the head assembly, voiding the 5-year warranty. For above-freezing but cold-season properties (40-50-F), consider changing filters every 2 months instead of 3, as lower temperatures slow chlorine degradation and extend bacterial survival on the cellulose substrate.
The carbon-impregnated cellulose cartridge (WHKF-DB1) releases fine carbon particles during the initial break-in period. These particles are harmless activated carbon fines, not filter degradation. To minimize: after installing a new carbon cartridge, run water through the system for 5 minutes (approximately 10 gallons at kitchen faucet flow) before using the water for drinking or cooking. The first 24 hours may show slight gray tinting in a clear glass-this is normal and clears within 48 hours. If black particles persist beyond 48 hours, the cartridge may have been damaged during installation (cracked end cap, fractured media core) and should be replaced.
Whirlpool specifies a 40-100-F operating temperature range and indoor installation only. The ABS plastic bracket and polypropylene sumps degrade under prolonged UV exposure, becoming brittle and prone to cracking within 6-12 months of direct sunlight. If outdoor installation is unavoidable, mount the system inside a weatherproof enclosure (Nema 3R rated or better) with insulation to prevent freezing. Brass inlet/outlet inserts resist corrosion, but the steel mounting bracket will rust in humid outdoor environments unless painted or coated. For outdoor/whole-house applications, consider the Culligan HF-360A with its UV-resistant sump, though this remains a single-stage sediment-only system.
Methodology
FilterTested.com evaluates whole-house filtration systems through a standardized 90-day residential test protocol. Each system is installed on an active household water supply and monitored with the following instruments: pressure measured via digital transducers (Omega PX409) calibrated to NIST-traceable standards at 0.1 PSI resolution, free chlorine measured with a Hanna HI761 photometer (resolution 0.01 ppm), turbidity measured with a Hanna HI98703 nephelometer (resolution 0.01 NTU), pH measured with an Apera PH20 pocket tester (-0.1 accuracy), and flow rate measured by timed fill of calibrated vessels. We log daily water consumption via a Neptune R900i submeter, track filter change time with a stopwatch, and calculate total cost of ownership using current Amazon pricing with the filtertested0726-20 affiliate tag. Simultaneous fixture tests are performed using combinations of shower, kitchen sink, bathroom sink, and toilet flush at realistic residential flow rates. All test units are purchased at retail to eliminate manufacturer selection bias.
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