WHO Series
iSpring WHO32B Whole House Water Filter System, Horizontal Housings for Ease Filter Replacement, Reduces Chlorine, Sediment, Odors& 1000+, Commercial-Grade 3-Stage 20"x4.5" Industry Standard Filters, 1" Inlet/Outlet (WHO32B)
0-Gravity Slide In-out System: No more heavy lifting, upgraded from WGB series, the WHO series whole house water filter systems feature horizontal housing system with built-in drain valve, allowing filter cartridges to be slide in & out horizontally and effortlessly.
No More Guesswork & Overtightening: WHO series whole house water filtration systems feature Seal Mark, simply align the logo for the perfect seal, helping prevent overtightening and damaging the O-ring.
Commercial-Grade High Capacity Filtration: With certified industrial standard 20″ x 4.5″ so called "jumbo" filter cartridges, delivering clean, safe water at up to 15 GPM, lasting up to 100,000 gallons or 12 months, reducing chlorine, sediments, rust, pesticides, VOCs, odors and 1000+, guaranteed.
Easy Placement & Installation: Made possible by freestanding all-metal frame, standard 1' FNPT inlet/outlet, push-in quick-connect fittings, double O-rings on housings, and step-by-step YouTube guides.
Industry-Standard Filters: Comparing to customized proprietary filters, iSpring WHO series uses 20" x 4.5" industrial standard water filter cartridges - no obligation, widely available, and more cost-effective. The filters are individually wrapped to maintain peak performance - remember to unwrap before installing. Search for "F3WGB32B" or "B0779G2676" for replacement filter pack.
Trusted Legend US Brand: Founded in 2007, iSpring serves millions of homes and businesses across 21 countries - and growing.
Pro Support by True Human Agent: Register online to activate your lifetime tech support - our teams in Atlanta GA and 7 global locations are happy to help.
TDS-Friendly System: Our whole house water filters retain healthy minerals for balanced water. Choose iSpring whole house RO system if full TDS removal is desired.
iSpring WHO32BM Iron Manganese Whole House Water Filter System, Horizontal Housings & Drain Valve for Mess-Free Filter Changes, Also Reduces Chlorine, Sediment, Taste, Odor, Commercial-Grade 3-Stage Universal Filters, Freestanding Frame (WHO32BM)
POWERFUL PROTECTION AGAINST IRON, MANGANESE, CHLORINE & SEDIMENTS: Equipped with high-capacity 20" x 4.5" jumbo cartridges, the iSpring WHO Series whole house water filter system helps reduce iron, manganese, chlorine, sediment, rust, VOCs, bad tastes, odors, and 1000+ contaminants while maintaining strong water flow up to 15 GPM for homes and light commercial use. Designed for long-lasting performance, the system delivers clean, filtered water for up to 12 months or 100,000 gallons, depending on water quality and usage.
EASY FILTER CHANGES — NO MORE HEAVY HOUSINGS OR WATER MESS: Traditional whole house water filtration systems require twisting off heavy filter housings filled with water — causing spills, strain, and frustration. The iSpring WHO Series features an innovative horizontal housing design with built-in drain valves, allowing you to release pressure and drain water before replacing filters. Simply slide cartridges in and out with less lifting, less mess, and less hassle.
BUILT-IN SEAL MARK — KNOW IT’S TIGHTENED CORRECTLY: No more guessing if the housing cap is fully sealed. The housing logo aligns horizontally when properly tightened, helping prevent overtightening, damaged O-rings, leaks, and difficult future maintenance. Easier for homeowners, safer for long-term use.
USES INDUSTRY-STANDARD 20" x 4.5" FILTERS — NO PROPRIETARY LOCK-IN: Unlike systems requiring expensive brand-specific cartridges, the WHO Series whole house water filter systems use universal industry-standard filters that are widely available and easy to replace. Freely customize filtration stages based on your water needs while enjoying lower long-term maintenance costs. For compatible replacement filter packs, search “F3WGB32BKS” or “B08HPG7K3X”.
FREESTANDING METAL FRAME — NO WALL MOUNTING REQUIRED: The heavy-duty freestanding bracket allows flexible floor placement without needing to mount the whole home water filter system onto walls. Designed for easier installation and maintenance access in garages, basements, utility rooms, and tight spaces.
TRUSTED U.S. BRAND WITH LIFETIME TECH SUPPORT: Founded in 2007, iSpring serves millions of customers worldwide with dependable water filtration solutions. Includes lifetime technical support from real human agents based in Atlanta, GA.
TDS-FRIENDLY SYSTEM: Our whole house water filters retain healthy minerals for balanced water. Choose iSpring whole house RO system if full TDS removal is desired.
iSpring WHO32B-KS Heavy Metals Whole House Water Filter System, Horizontal Housings & Drain Valve for Mess-Free Filter Changes, Reduces Chlorine, Sediment, Lead, Hydrogen Sulfide, Chloramine, Commercial-Grade Universal Filters, Freestanding Frame (WHO32B-KS)
POWERFUL PROTECTION AGAINST HEAVY METALS, CHLORINE & SEDIMENTS: Equipped with high-capacity 20" x 4.5" jumbo cartridges, this whole house water filtering system helps reduce chlorine, sediment, lead, mercury, hydrogen sulfide, chloramine, odors, rust, VOCs, and 1000+ contaminants while maintaining strong water flow up to 15 GPM for homes and light commercial use. Long-lasting filtration delivers clean water for up to 12 months or 150,000 gallons, depending on water quality and usage.
EASY FILTER CHANGES — NO MORE HEAVY HOUSINGS OR WATER MESS: Traditional whole house water filter systems require twisting off heavy filter housings filled with water — causing spills, strain, and frustration. The iSpring WHO Series features an innovative horizontal housing design with built-in drain valves, allowing you to release pressure and drain water before replacing filters. Simply slide cartridges in and out with less lifting, less mess, and less hassle.
BUILT-IN SEAL MARK — KNOW IT’S TIGHTENED CORRECTLY: No more guessing if the housing cap is fully sealed. The housing logo aligns horizontally when properly tightened, helping prevent overtightening, damaged O-rings, leaks, and difficult future maintenance. Easier for homeowners, safer for long-term use.
USES INDUSTRY-STANDARD 20" x 4.5" FILTERS — NO PROPRIETARY LOCK-IN: Unlike systems requiring expensive brand-specific cartridges, the WHO Series whole house water filtration systems use universal industry-standard filters that are widely available and easy to replace. Freely customize filtration stages based on your water needs while enjoying lower long-term maintenance costs. For compatible replacement filter packs, search “F3WGB32BKS” or “B08HPG7K3X”.
FREESTANDING METAL FRAME — NO WALL MOUNTING REQUIRED: The heavy-duty freestanding bracket allows flexible floor placement without needing to mount the whole house system onto walls. Designed for easier installation and maintenance access in garages, basements, utility rooms, and tight spaces.
TRUSTED U.S. BRAND WITH LIFETIME TECH SUPPORT: Founded in 2007, iSpring serves millions of customers worldwide with dependable water filtration solutions. Includes lifetime technical support from real human agents based in Atlanta, GA.
TDS-FRIENDLY SYSTEM: Our whole house water filters retain healthy minerals for balanced water. Choose iSpring whole house RO system if full TDS removal is desired.
iSpring WHO32B-KDS Whole House Water Filter System, Horizontal Housings & Drain Valve for Spill-Free Filter Changes, Reduces Chlorine, Heavy Metals, Scale, & Odor, 20" x 4.5" Universal Cartridges, Freestanding Metal Frame (WHO32B-KDS )
REDUCES CHLORINE, LEAD, MERCURY & VOCs — CLEANER WATER FROM EVERY TAP: This 3 stage whole house water filter system targets chlorine (up to 99%), dissolved lead, mercury, and volatile organic compounds (VOCs) — helping eliminate chemical taste, pool-like odor, and metallic aftertaste in water from every tap.
INHIBITS SCALE BUILDUP — PROTECTS YOUR WATER HEATER, DISHWASHER & FAUCETS: The WHO32B-KDS whole house water filtration system reduces hard-water scale formation before it reaches your appliances — helping prevent clogged spray arms, cloudy glassware, and reduced efficiency in water heaters and faucets. Users report visibly less white residue and smoother operation after just a few months.
NO MORE WATER FLOODS OR BACK STRAIN WHEN CHANGING FILTERS: Traditional whole house water filters force you to twist off heavy, water-filled housings — risking spills, leaks, and injury. The WHO series water filters solve it: horizontal housings + built-in drain valves let you safely release pressure and drain water before opening — so you slide cartridges in/out cleanly, confidently, and in under 90 seconds.
LOGO-ALIGNED TIGHTENING — INSTANT VISUAL CONFIRMATION THAT IT’S SECURE: When the iSpring logo on the housing cap is perfectly parallel to the floor, the cap is fully tightened and the O-ring is properly compressed. Just use the included wrench to secure it — no torque meter needed, no guesswork, and no leaks from under-tightening or over-tightening.
FREESTANDING STEEL FRAME — NO WALL MOUNTING, NO DRILLING, NO STUDS NEEDED: This whole house water filter stands securely on any level floor — ready for plumbing connection right out of the box. Perfect for garages, basements, utility closets, or other spaces where wall mounting isn’t possible or practical.
USES UNIVERSAL 20" x 4.5" FILTERS — FULL CONTROL, ZERO LOCK-IN: This whole house water filter system uses standard 20" x 4.5" filters so you can freely choose the right combination for your water quality needs. The compatible replacement pack for this water filtration system is "F3WGB32BKDS" or ASIN "B0BGYK27NZ".
LASTS UP TO 250,000 GALLONS OR 12 MONTHS — HIGH CAPACITY, LOW MAINTENANCE: This whole home water filtration system delivers full filtration performance for up to 250,000 gallons or 12 months (whichever comes first), with a high-flow capacity of up to 15 GPM and an included 9-inch long-handle wrench for secure, comfortable tightening.
RETAINS NATURAL MINERALS — NOT A WATER SOFTENER, DOES NOT REDUCE TDS: Unlike reverse osmosis systems, this 3-stage whole house water filter system reduces scale, corrosion, and contaminants while preserving calcium, magnesium, and potassium — protecting appliances without altering water hardness or total dissolved solids. Suitable for both municipal and well water applications.
LIFETIME U.S.-BASED TECH SUPPORT — REAL PEOPLE, REAL HELP: Backed by iSpring’s lifetime technical support team — all agents are based in Atlanta, GA, trained on WHO series whole house water filter systems, and available via phone, email, or live chat. Includes free access to installation videos, troubleshooting guides, and filter replacement tutorials.
iSpring WHO32B-PFKDS Ultimate PFAS Removal Whole House Water Filter System, Horizontal Housings & Drain Valve for Spill-Free Filter Changes, Removes PFOA, PFOS, Chlorine, Heavy Metals, Scale & Corrosion, Freestanding Metal Frame (WHO32B-PFKDS)
REMOVES PFAS, CHLORINE, HEAVY METALS & ODOR-CAUSING COMPOUNDS: The WHO32B-PFKDS whole house water filtration system removes PFAS (including PFOA and PFOS, up to 99%), chlorine (up to 99%), dissolved lead, mercury, hydrogen sulfide, volatile organic compounds (VOCs), and other common contaminants — helping eliminate chemical taste, metallic aftertaste, rotten egg odor, and persistent discoloration at every tap.
INHIBITS SCALE BUILDUP — PROTECTS YOUR WATER HEATER, DISHWASHER & FAUCETS: The WHO32B-PFKDS whole house water filter system reduces hard-water scale formation before it reaches your appliances — helping prevent clogged spray arms, cloudy glassware, and reduced efficiency in water heaters and faucets. Users report visibly less white residue and smoother operation after just a few months.
NO MORE WATER FLOODS OR BACK STRAIN WHEN CHANGING FILTERS: Traditional whole house water filters force you to twist off heavy, water-filled housings — risking spills, leaks, and injury. The WHO series water filters solve it: horizontal housings + built-in drain valves let you safely release pressure and drain water before opening — so you slide cartridges in/out cleanly, confidently, and in under 90 seconds.
LOGO-ALIGNED TIGHTENING — INSTANT VISUAL CONFIRMATION THAT IT’S SECURE: When the iSpring logo on the housing cap is perfectly parallel to the floor, the cap is fully tightened and the O-ring is properly compressed. Just use the included wrench to secure it — no torque meter needed, no guesswork, and no leaks from under-tightening or over-tightening.
FREESTANDING STEEL FRAME — NO WALL MOUNTING, NO DRILLING, NO STUDS NEEDED: This whole house water filter stands securely on any level floor — ready for plumbing connection right out of the box. Perfect for garages, basements, utility closets, or other spaces where wall mounting isn’t possible or practical.
USES UNIVERSAL 20" x 4.5" FILTERS — FULL CONTROL, ZERO LOCK-IN: This whole house water filter system uses standard 20" x 4.5" filters so you can freely choose the right combination for your water quality needs. The compatible replacement pack for this water filtration system is "F3WGB32BPFKDS" or ASIN "B0FQD5S137".
LASTS UP TO 250,000 GALLONS OR 12 MONTHS — HIGH CAPACITY, LOW MAINTENANCE: This whole home water filtration system delivers full filtration performance for up to 250,000 gallons or 12 months (whichever comes first), with a high-flow capacity of up to 15 GPM and an included 9-inch long-handle wrench for secure, comfortable tightening.
RETAINS NATURAL MINERALS — NOT A WATER SOFTENER, DOES NOT REDUCE TDS: Unlike reverse osmosis systems, this 3-stage whole house water filter system reduces scale, corrosion, and contaminants while preserving calcium, magnesium, and potassium — protecting appliances without altering water hardness or total dissolved solids. Suitable for both municipal and well water applications.
LIFETIME U.S.-BASED TECH SUPPORT — REAL PEOPLE, REAL HELP: Backed by iSpring’s lifetime technical support team — all agents are based in Atlanta, GA, trained on WHO series whole house water filter systems, and available via phone, email, or live chat. Includes free access to installation videos, troubleshooting guides, and filter replacement tutorials.
iSpring WHO32B-MKS Iron, Manganese, H2S Whole House Water Filter System, Horizontal Housings & Drain Valve for Spill-Free Filter Changes, Also Removes Chlorine, Sediments & Heavy Metals, Freestanding Metal Frame (WHO32B-MKS)
REMOVES IRON, MANGANESE, HYDROGEN SULFIDE & MORE: This 3 stage whole house water filter system targets dissolved iron (prevents yellow/brown stains, up to 3ppm), manganese (stops black discoloration, up to 1ppm), hydrogen sulfide (eliminates rotten egg odor), chlorine, sediments, and heavy metals — delivering visibly clearer, odor-free water for homes on municipal or well water supplies.
NO MORE WATER FLOODS OR BACK STRAIN WHEN CHANGING FILTERS: Traditional whole house water filters force you to twist off heavy, water-filled housings — risking spills, leaks, and injury. The WHO series water filters solve it: horizontal housings + built-in drain valves let you safely release pressure and drain water before opening — so you slide cartridges in/out cleanly, confidently, and in under 90 seconds.
LOGO-ALIGNED TIGHTENING — INSTANT VISUAL CONFIRMATION THAT IT’S SECURE: When the iSpring logo on the housing cap is perfectly parallel to the floor, the cap is fully tightened and the O-ring is properly compressed. Just use the included wrench to secure it — no torque meter needed, no guesswork, and no leaks from under-tightening or over-tightening.
FREESTANDING STEEL FRAME — NO WALL MOUNTING, NO DRILLING, NO STUDS NEEDED: This whole house water filter stands securely on any level floor — ready for plumbing connection right out of the box. Perfect for garages, basements, utility closets, or other spaces where wall mounting isn’t possible or practical.
USES UNIVERSAL 20" x 4.5" FILTERS — FULL CONTROL, ZERO LOCK-IN: This whole house water filter system uses standard 20" x 4.5" filters so you can freely choose the right combination for your water quality needs. The compatible replacement pack for this water filtration system is "F3WGB32BMKS" or ASIN "B0CMS5P7YM".
LASTS UP TO 150,000 GALLONS OR 12 MONTHS — HIGH CAPACITY, LOW MAINTENANCE: This whole home water filtration system delivers full filtration performance for up to 150,000 gallons or 12 months (whichever comes first), with a high-flow capacity of up to 15 GPM and an included 9-inch long-handle wrench for secure, comfortable tightening.
DOES NOT REDUCE TDS — PRESERVES NATURAL MINERALS, NOT A WATER SOFTENER: Unlike reverse osmosis or distillation systems, this 3-stage whole house water filter system leaves total dissolved solids (TDS) unchanged.
LIFETIME U.S.-BASED TECH SUPPORT — REAL PEOPLE, REAL HELP: Backed by iSpring’s lifetime technical support team — all agents are based in Atlanta, GA, trained on WHO series whole house water filter systems, and available via phone, email, or live chat. Includes free access to installation videos, troubleshooting guides, and filter replacement tutorials.