Record WT-0025 ยท Last verified September 2026
Express Water 3 Stage Deluxe Whole House Water Filter System - Heavy Metals (WH300SCKS)
Whole-house cartridge system by Express Water. No system-level certification found at NSF, IAPMO, WQA or CSA.
We may earn a commission. It never changes a grade.
Scorecard
| Measure | Grade | Basis |
|---|---|---|
| Certification evidence | D | Maker claims only, no certification or published lab data |
| 10-year cost | C | $7,963 over 10 years |
| Flow rate | A | 15 gpm rated flow |
| Warranty | F | 1 years on main parts |
| Returns | C | 30 days, 15% restocking fee |
What it treats
"Certified" means an independent body (NSF, IAPMO, WQA or CSA) lists this system for that contaminant. "Lab tested" means the maker published a third-party lab report. "Maker claim" means neither.
| Contaminant | Evidence | |
|---|---|---|
| Sediment | Maker claim | Other systems for Sediment |
| Chlorine | Maker claim | Other systems for Chlorine |
| Chloramine | Maker claim | Other systems for Chloramine |
| Lead | Maker claim | Other systems for Lead |
| Iron | Maker claim | Other systems for Iron |
| Copper | Maker claim | Other systems for Copper |
| VOCs | Maker claim | Other systems for VOCs |
| Hydrogen sulfide | Maker claim | Other systems for Hydrogen sulfide |
No claim made for: PFAS, Manganese, Hardness, Bacteria, Arsenic, Nitrate, Fluoride, Uranium.
PFAS evidence: No PFAS claim.
Certifications
No certification of any kind found for this system.
Specifications
| Type | Whole-house cartridge system |
|---|---|
| Technology | Sediment filtration, KDF media, Catalytic carbon, Activated carbon |
| Water source | City water, Private well |
| Price | $548 |
| Rated flow | 15 gallons per minute |
| Capacity | Up to 100,000 gallons or 6-12 months per filter set |
| Media | 5-micron polypropylene sediment (SED), KDF (kinetic degradation fluxion) with catalytic carbon, activated carbon block (ACB) |
| Stages | 3 |
| Port size | 1 inch |
| Needs a drain | No |
| Needs power | No |
| DIY install | Yes, with basic plumbing skills |
| Dimensions | H 29.25 x L 23.5 x D 8.5 in |
| Weight | 63 lb |
| Warranty | 1 year limited warranty (defective parts replaced; filters excluded); free lifetime support. |
| Returns | Refund policy: 30-day money back guarantee (policy text names RO systems, parts and filters); used non-defective or opened-filter returns incur 15% restocking fee; customer pays return shipping unless defective. |
10-year cost
| Item | Each | Times in 10 years | Cost |
|---|---|---|---|
| System purchase | $548 | 1 | $548 |
| Installation (assumed, professional) | $500 | 1 | $500 |
| Whole House Filter Set - Heavy Metals (sediment, KDF, carbon block; FLTWH2045CKS1) | $187 | 19 | $3,553 |
| Sediment filter, 5 micron, 4.5 x 20 in (FLTWH2045S) | $33 | 19 | $627 |
| KDF catalytic carbon heavy metal filter, 4.5 x 20 in (FLTWH2045K) | $100 | 19 | $1,900 |
| Activated carbon block filter, 4.5 x 20 in (FLTWH2045C) | $44 | 19 | $836 |
| Total | $7,963 |
Install assumption: $500 for whole-house systems, $150 for under-sink units. Installing it yourself brings the total to $7,463. Try your own numbers in the 10-year cost calculator.
Owner reports
On-site Yotpo reviews (4.8 from 452) low-star reports repeat cracked or pinhole-leaking filter housings (one flooded a garage after 3+ years, outside the 1-year warranty), pressure gauges reading zero, and customer-paid return shipping. Trustpilot (4.1 from 1,192) adds damaged deliveries, slow support and filters clogging fast.
Trustpilot: 4.1 from 1192 reviews (source).
Flow is stated as '0.25 gallons per second' (= 15 GPM). No certification or third-party test claim on this system or its 20 in filters, and nothing for Express Water in NSF's DWTU listings (an unrelated 'Express Parts LLC' Dropology cartridge listing exists). Express Water's 10 in whole-house cartridges claim 'Verified by independent laboratory testing to meet NSF / ANSI 58 Standard' (an RO standard). Cheaper non-deluxe WH-300RS-CKS heavy metals system sells for $449.99. Product-page reviews include a cracked-housing flood report and complaints about the 1-year warranty. The Impact advertiser page is titled 'Advanced Purification Engineering Corporation - Express Water'; Advanced Purification Engineering Corp. is APEC Water's corporate name, while expresswater.com names Express Water, Inc.
Where we cover it
- Best picks: The best whole house water filters for city water
- Best picks: The best whole house water filters
Alternatives in the same category
| System | Grade | Price | 10-yr cost | Certified to |
|---|---|---|---|---|
| Aqua-Pure (formerly 3M Aqua-Pure, Solventum) AP904 | B | $432 | $3,742 | NSF/ANSI 42 |
| Home Master HMF3SdgFeC | B | $550 | $2,633 | None |
| Pentair FloPlus Protect 20BB (150736) | B | $325 | $2,343 | NSF/ANSI 53 |
| SpringWell LCR-1 | B | $1,554 | $5,869 | NSF/ANSI 53 |
| Culligan WH-HD200-C | C | $74 | $2,801 | None |
Sources
- expresswater.com/products/heavy-metal-whole-house
- expresswater.com/products/heavy-metals-replacement-set
- expresswater.com/products/sediment-whole-house-filter
- expresswater.com/products/heavy-metal-filter-kinetic-degredation-fluxion
- expresswater.com/products/activated-carbon-block-whole-house
- expresswater.com/products/express-water-whole-house-water-filter-system-heavy-metals
- expresswater.com/products/whole-house-filter-set-sed-kdf-10x4-5
- expresswater.com/pages/warranty
- expresswater.com/pages/shipping-and-returns
- expresswater.com/policies/terms-of-service
- app.impact.com/campaign-promo-signup/Express-Water.brand
- apecwater.com/
- info.nsf.org/Certified/dwtu/listings.asp?CompanyName=express&Program=DWTU
- trustpilot.com/review/expresswater.com
- expresswater.com/products/heavy-metal-whole-house.json
- cdn.shopify.com/s/files/1/0025/0963/5637/files/Whole_House_3_Stage_Installation_Manual_202
- expresswater.com/products/heavy-metals-replacement-set.json
- expresswater.com/products/sediment-whole-house-filter.json
- expresswater.com/products/heavy-metal-filter-kinetic-degredation-fluxion.json
- expresswater.com/products/activated-carbon-block-whole-house.json
- expresswater.com/pages/whole-house-systems
- expresswater.com/policies/refund-policy
- api-cdn.yotpo.com/v1/widget/AoIYKtzHVxu9cMKgeZ85B6iblb6UPtSDHzHmDKBv/products/149177342366
- trustpilot.com/review/expresswater.com?stars=1&stars=2
