Home Master HMF2SmgCC vs iSpring WGB21B

Last updated: November 2, 2026

The iSpring WGB21B is the better whole-house water filter overall, rated 3.4 to 2.3. The iSpring WGB21B leads on price, certification and flow. The Home Master HMF2SmgCC wins on warranty. The iSpring WGB21B costs $219.69 less ($155.99 vs $375.68).

Home Master HMF2SmgCC vs iSpring WGB21B

Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every cartridge whole-house water filter; a clear win is highlighted. How we rank explains each one.

Factor weightiSpring WGB21BHome Master HMF2SmgCC
Overall rating3.4/52.3/5
Running cost 25%44 $0.90 per 1,000 gallons ($45.11 every 50,000 gallons)19 $1.79 per 1,000 gallons ($169.90 every 95,000 gallons)
Certification 25%30 tested to NSF/ANSI 42, not certified0 no certification in a public listing, no tested to claim
Flow 15%100 15 gpm service flow50 10 gpm service flow
Price 20%98 $155.9945 $375.68
Warranty 15%0 1-year warranty11 2-year warranty

Specifications

iSpring WGB21BHome Master HMF2SmgCC
Filtration
Capacity50,000 gallons95,000 gallons
Replacement filters or media$45.11$169.90
Running cost$0.90 per 1,000 gal$1.79 per 1,000 gal
Stages22
Tested to (not certified)NSF/ANSI 42-
ChloramineNoYes
PFASNoNo
Build
Flow15 gpm10 gpm
Ports1 in1 in
UV stageNoNo
Warranty1 year2 years

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