Express Water · Whole-house

Express Water WH300SCKS 3-stage heavy-metal whole-house: what it removes and what it costs

Model: WH300SCKS (sediment + KDF + carbon block, 4.5in x 20in; refill FLTWH2045CKS1)

The Express Water WH300SCKS 3-stage heavy-metal whole-house has no certifier listing for any of the contaminants we track. Express Water also claims lead, chlorine, chloramine and iron from lab tests that are not certification. For 2 people drinking and cooking with it, replacement filters cost about $187 a year.

Photo: Express Water

Price at Express Water $548

certified reductions we track

0.2¢

filters per gallon at rated life

Check price on Amazon → Or buy direct from Express Water

Price checked 2026-10-23. We may earn a commission.

What the Express Water WH300SCKS 3-stage heavy-metal whole-house removes

"Certified" means a certifier (NSF, WQA, IAPMO or CSA) lists this exact product for that reduction claim; the listing is linked. "Brand test only" means Express Water cites a lab report but no certifier lists the claim. See certified vs. tested.

Contaminant	Status	Evidence
Lead	Brand test only	Brand claim (no lab named): "Heavy metals, lead, chlorine, chloramines, iron, rust, sediment, solvents, pharmaceuticals, odor"
Chlorine	Brand test only	Brand claim (no lab named): "Heavy metals, lead, chlorine, chloramines, iron, rust, sediment, solvents, pharmaceuticals, odor"
Chloramine	Brand test only	Brand claim (no lab named): "Heavy metals, lead, chlorine, chloramines, iron, rust, sediment, solvents, pharmaceuticals, odor"
Iron	Brand test only	Brand claim (no lab named): "Heavy metals, lead, chlorine, chloramines, iron, rust, sediment, solvents, pharmaceuticals, odor"

Not verified, either way (no certification or brand claim): PFAS, Fluoride, Arsenic, Nitrate, Chromium 6, Mercury, Microplastics, Cysts, VOCs, TDS, Bacteria and viruses, Copper, Uranium, 1,4-dioxane.

What it costs to run

Yearly cost = replacements per year × filter price, for each filter it uses; a filter is replaced at its gallon rating or its month limit, whichever comes first. Water use: all indoor water (58.6 gallons per person a day).

Household	Gallons a year	Filters a year	Total a year	Per gallon
1 person	21,389	$187	$187	0.9¢
2 people	42,778	$187	$187	0.4¢
4 people	85,556	$187	$187	0.2¢

Replacement filters

Filter	Rated life (gallons)	Rated life (months)	Price
Whole House Filter Set - Heavy Metals (FLTWH2045CKS1)	100,000 Source note expresswater.com	12 est. Source note '100,000 gallons or 6-12 months of use on average' expresswater.com	$186.99 Source note 1-year set $186.99; 2-year $335.99, seen 2026-10-23 expresswater.com

Specs

Type: Whole-house
Price: $548

Source note

$547.99 (no compare-at) in store data 2026-10-23; page also showed $520.60. expresswater.com
Installation: Plumber recommended
Flow rate: 15 gal/min

Source note

'0.25 gallons per second' (= 15 GPM); 40-80 psi. Filters 100,000 gal or 6-12 months. expresswater.com
Needs power: No

Compare the Express Water WH300SCKS 3-stage heavy-metal whole-house

Common questions

What does the Express Water WH300SCKS 3-stage heavy-metal whole-house remove?

Does the Express Water WH300SCKS 3-stage heavy-metal whole-house remove PFAS?

It has no certifier listing or brand claim for PFAS reduction.

How much does the Express Water WH300SCKS 3-stage heavy-metal whole-house cost to run?

About $187 a year for 2 people ($187 for 1, $187 for 4), counting replacement filters, for all indoor water (58.6 gallons per person a day).

Data checked 2026-10-23. 102 filters tracked.