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iSpring WGB32B vs Home Master HMF3SdgFeC: Which 3-Stage Cartridge Filter for Well Water?

Specs verified 2026-10-05 from manufacturer pages and retailer listings. We have not lab-tested either system.

Both of these are three-stage whole-house cartridge systems on a steel bracket, both use 20 x 4.5 in. housings with 1 in. ports, both are rated up to 15 GPM, both have a 100,000-gallon carbon stage, and both sell for a little over $500 with no drain, power or backwash. They rank eighth and seventh on our list, one place apart, and the single place is explained by one cartridge.

The iSpring WGB32B runs a 5-micron sediment cartridge into two coconut-shell carbon blocks and makes no iron claim. The Home Master HMF3SdgFeC runs a multi-gradient sediment cartridge that steps down to 1 micron, then a radial-flow iron reduction cartridge rated for iron under 3 ppm and manganese under 1 ppm, then radial-flow granular carbon, and it is marketed specifically for potable well water.

iSpring WGB32B 3-Stage Whole House Water Filter vs Home Master HMF3SdgFeC Whole House 3-Stage Sediment, Iron & Carbon Filter: specs side by side

Verified fields only. A row is omitted when neither manufacturer publishes the figure.

iSpring WGB32B 3-Stage Whole House Water Filter versus Home Master HMF3SdgFeC Whole House 3-Stage Sediment, Iron & Carbon Filter specifications
SpeciSpring WGB32B 3-Stage Whole House Water FilterHome Master HMF3SdgFeC Whole House 3-Stage Sediment, Iron & Carbon Filter
ModelWGB32B (20 in. x 4.5 in. cartridges: FP25B sediment + 2x FC25B carbon block)HMF3SdgFeC (Perfect Water Technologies); 20 x 4.5 in. cartridges
TypeWhole-house filterWhole-house filter
TreatsSediment; also chlorine (up to 99%, maker claim), taste and odor, THMs, VOCs, rust, turbiditySediment, Iron, Manganese; also VOCs, TOCs, herbicides, pesticides, hydrogen sulfide (maker page says the filter removes it but that it shortens cartridge life; stated feed-water limit is none)
Service flow15 GPM'Up to 15 GPM' on the product page; the WGB & WDS series manual gives 'Flow Rate 3-15 GPM', 'Working Pressure 25-80 psi', 'Working Temperature 40-100F', 'pH Requirement 6.0-9.0'. Page FAQ: the system does not address TDS reduction.15 GPM'up to 15 gallons per minute'. Operating limits on the maker's page (read 2026-10-06): 'Iron: < 3ppm', 'Manganese: <1 ppm', 'Iron Bacteria: NONE', 'Hydrogen Sulfide: NONE (this filter removes Hydrogen Sulfide, but it reduces the effective life of the filter cartridge)'.
Capacity100,000 gallons100,000 gallons or up to 12 months per cartridge set; replacement every 6-12 months. Sediment cartridge is 5 micron.100,000 gallonsCarbon filter '100,000 gallon capacity'; maker says most families of four replace filters about once a year.
Media / technology5-micron polypropylene sediment cartridge + two coconut-shell carbon block (CTO) cartridgesStage 1 multi-gradient sediment; stage 2 radial-flow iron reduction cartridge; stage 3 radial-flow granular activated coconut shell carbon
Stages33
Connection1 in. FNPT1 in. ports
InstallationDIY'DIY Installation: Yes - comes with manual and step-by-step video guide'. 1 in. female NPT ports on a steel bracket; housing wrench included.DIYCartridge housings on a steel bracket with 1 in. NPT ports; sold direct for owner installation. Amazon listing adds: for non-chlorinated well water only, not for iron bacteria or pH below 7.0.
Warranty1-year manufacturer warrantyiSpring standard '1-year limited warranty' (stated on the WGB21B/WGB32BM pages and iSpring's Amazon listings); extended 3/5/10-year warranties sold as paid options on the product page. 30-day money-back; lifetime tech support.2-year manufacturer warranty'2 Year Warranty' on the product page; page also mentions 'up to 5 year' without detail.
Dimensions24.5 x 8 x 28 in.25 in. H x 24 in. W x 9 in. D
Weight45 lb48 lb
Price$517 at iSpring as of Oct 2026$550 at Home Master as of Oct 2026
Micron ratingNot stated1 micronStage 1 multi-gradient depth polypropylene sediment cartridge: 25 micron surface, 10 micron and 5 micron layers, 1 micron inner core. Stage 3 radial-flow GAC is 20 micron.

iSpring WGB32B 3-Stage Whole House Water Filter

Check price at iSpringSee it at Amazon

Home Master HMF3SdgFeC Whole House 3-Stage Sediment, Iron & Carbon Filter

Check price at Home MasterSee it at Amazon

What each one treats

iSpring's WGB32B is a sediment and carbon system. Stage one is a 5-micron polypropylene sediment cartridge (FP25B); stages two and three are FC25B carbon blocks for chlorine (up to 99%, a maker claim), taste and odor, THMs and VOCs, with rust and turbidity on the list. iSpring says it filters both city and well water but does not filter out viruses and bacteria, does not reduce TDS, and makes no iron, manganese or sulfur claim. On a well, that makes it a polishing filter for clear water or a final stage behind an iron filter.

Home Master's HMF3SdgFeC adds the iron stage. The sediment cartridge is a 4-gradient depth filter with a 25-micron surface, 10- and 5-micron layers and a 1-micron core, which is much finer than the iSpring's 5-micron single rating. The radial-flow iron cartridge is for iron under 3 ppm and manganese under 1 ppm, and the radial-flow coconut-shell GAC (20 micron) handles VOCs, TOCs, herbicides and pesticides, with Home Master claiming up to 95% removal of its listed contaminants, a maker figure. The maker's page says the filter also removes hydrogen sulfide but gives the acceptable feed level as none, because it shortens cartridge life, and the Amazon listing says the unit is for non-chlorinated well water only, not for iron bacteria, and not for pH below 7.0.

Flow rate, capacity and cartridge life

Both are rated up to 15 GPM with 1 in. ports, and both are mounted assemblies of about the same size: the iSpring is 24.5 x 8 x 28 in. at 45 lb, the Home Master 25 in. tall, 24 in. wide and 9 in. deep at 48 lb. The iSpring works between 25 and 80 psi, 40 to 100 F and pH 6 to 9; Home Master does not publish a pressure range on the page we read.

Cartridge life is comparable on the carbon side. iSpring rates its set at 100,000 gallons or up to 12 months with replacement every 6 to 12 months; Home Master rates the carbon stage at 100,000 gallons and says most families of four change filters about once a year. The Home Master's 1-micron sediment core will load faster than a 5-micron cartridge on a dirty well, and its iron cartridge will be the limiting stage if iron runs near 3 ppm, so a spin-down ahead of either unit is sensible.

Warranty, certifications and support

Home Master gives a 2-year warranty on the product page, which also mentions up to 5 years without detail. iSpring's standard warranty is 1 year, with paid 3-, 5- and 10-year extended warranties offered on the product page, a 30-day money-back period and lifetime tech support.

Neither is system-certified. iSpring says the WGB32B cartridges are tested by a third party to meet NSF/ANSI standards, without a standard number or a system listing. Home Master's page displays a company-level NSF/ANSI 42 certificate that does not name this model, so we record no certification for it either. Both exact models are listed on Amazon.

Price, install and running cost

The WGB32B was $516.99 at ispringfilter.com as of Oct 2026 (regular price). The HMF3SdgFeC was $550.00 at theperfectwater.com as of Oct 2026 (regular price, no sale shown). The $33 difference buys the iron stage and the finer sediment cartridge.

Both are DIY installs: 1 in. NPT ports on a bracket, with iSpring including a manual, step-by-step video and housing wrench, and Home Master selling direct for owner installation. Neither needs a drain or an outlet. Running cost is a cartridge set a year or so for either, with the Home Master's iron and 1-micron stages likely to be the first to need changing on a well that has iron or fine grit.

Verdict

For a well with any iron at all, the Home Master HMF3SdgFeC is the better of the two: for $33 more it adds a dedicated iron and manganese stage, a 1-micron final sediment rating and a 2-year warranty, and it is the one the maker actually sells for well water. The iSpring WGB32B is the pick when the test shows clean metals and the job is sediment, taste and odor, or when it sits behind an iron tank as a polishing stage, where its two carbon blocks and widely available standard cartridges are the point. Neither handles iron above 3 ppm, iron bacteria, acidic water or bacteria, and neither carries a system certification; if your water test shows any of those, look at the tank systems higher on the ranked list.

Both systems have full spec pages: iSpring WGB32B 3-Stage Whole House Water Filter and Home Master HMF3SdgFeC Whole House 3-Stage Sediment, Iron & Carbon Filter. For the wider field, see the ranked list, and size either one against your flow with the sizing guide.

Frequently asked questions

Does the iSpring WGB32B remove iron?

No. iSpring makes no iron, manganese or sulfur claim for the WGB32B; it is a 5-micron sediment plus carbon block system. The Home Master HMF3SdgFeC has a radial-flow iron cartridge for iron under 3 ppm and manganese under 1 ppm.

Which has the finer sediment filter?

The Home Master: its multi-gradient cartridge steps from 25 microns down to a 1-micron core. The iSpring's sediment cartridge is rated 5 micron.

Can either one handle hydrogen sulfide?

iSpring makes no sulfur claim for the WGB32B. Home Master's page says its filter removes hydrogen sulfide but gives the acceptable feed level as none, because it shortens cartridge life, so it is not sold for sulfur water.

What are the warranties?

Home Master: 2 years per the product page. iSpring: 1 year standard, with paid 3-, 5- and 10-year extensions, 30-day money-back and lifetime tech support.

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