Best Ao Smith in 2026

Filter for use with: Whole House Sediment Filter (AO-WH-PREV or AO-WH-PRE). Use only certified, genuine A. O. Smith replacement filters for continued contaminant removal and system performance.

Longer lasting appliances - whole house filter system designed to reduce sediment from every tap.

5 micron filtration - reduces sediment smaller than the human eye can see. NSF Certified to Standard 42 for removal of particulate class V.

Filter for use with: Whole House Filter System with Timer (AO-WH-PREL). Use only certified, genuine A. O. Smith filters for continued contaminant removal and system performance.

Longer lasting appliances - whole house filter system designed to reduce sediment from every tap.

25 micron filtration - reduces sediment smaller than the human eye can see.

Filter for use with: Whole House Sediment Filter (AO-WH-PREV or AO-WH-PRE). Use only certified, genuine A. O. Smith replacement filters for continued contaminant removal and system performance.

Longer lasting appliances - whole house filter system designed to reduce sediment from every tap.

35 micron filtration - reduces sediment smaller than the human eye can see.

Replacement Filter For The Advanced Main Faucet Under Sink Water Filter System (AO-MF-ADV) - Easy replacement and no plumber necessary. Includes one Claryum filter. Does NOT fit AO-MF, AO-FF, or AO-MF-B filter systems.

Advanced Filtration - Reduces up to 99% of 77 harmful contaminants including lead, mercury, asbestos, pesticides, pharmaceuticals, chlorine, and more.

Claryum Filtration Reduces Harmful Contaminants – those you can see, smell and taste, and those you can’t – for optimally clean water.

Replacement filter for: The Clean Water Filter - 2-Stage (AO-US-200) - Easily replace yourself without the need of a plumber.

Advanced Filtration - Reduces up to 99% of 77 harmful contaminants including lead, mercury, asbestos, pesticides, pharmaceuticals, chlorine, and more.

Use only certified, genuine A. O. Smith replacement filters for continued contaminant removal and system performance.

Filter for use with: Whole House Sediment Filter (AO-WH-PREV or AO-WH-PRE). Use only certified, genuine A. O. Smith filters for continued contaminant removal and system performance.

Longer lasting appliances - whole house filter system designed to reduce sediment from every tap.

5 micron filtration - reduces sediment smaller than the human eye can see.

Sediment Prevention - The AO-WHO-PREV system is certified to reduce sediment, dirt and rust in your water, applicances and plumbing fixtures. Designed to bring you sediment-free water from every tap in your home.

Easy Filter Replacement - The built-in shut-off bypass valve allows you to change filters witout turning off your water supply, and the pressure release button allows for quick, easy filter replacements. Uses universal 2.5 inch replacement cartridges (sold separately.)

For Stand-Alone Or Combind Use - This Whole House Filter System can be used by itself or with additional A.O. Smith filtration systems, allowing you to customize your filtration system to fit your home's unique needs.

Thermostat

For Use With Single Element Electric Water Heaters

Brand Name: Ao Smith

Sediment Prevention - The AO-WHO-PRE system is certified to reduce sediment, dirt and rust in your water, applicances and plumbing fixtures. Designed to bring you sediment-free water from every tap in your home.

Easy Filter Replacement - The built-in pressure relief button allows for easy filter replacements. Uses universal 2.5 inch replacement cartridges (sold separately.)

For Stand-Alone Or Combined Use - This Whole House Filter System can be used by itself or with additional A.O. Smith filtration systems, allowing you to customize your filtration system to fit your home's unique needs.

Salt-Free Scale Prevention - The AO-WH-DSCLR naturally reduces scale build up in pipes and plumbing using a salt & chemical-free system. No cleaning, backwashing, salt-bags or electricity required.

Works For All Your Water Needs - System works effectively on water for use in drinking, cooking, showering & bathing. Perfect for households of 4 or more people. System will not reduce TDS, sulfur, or iron.

Well Or City Water - Our Whole House Descaler is engineered to work with both well & city water systems.

Advanced Filtration For Healthy, Great Tasting Water - The AO-WH-FILTER reduces 97% of Chlorine taste & odor for clean water from every tap in your home. NOT a water softening system. Works For All Your Water Needs - System works effectively on water for use in drinking, cooking, showering & bathing. Perfect for households of 4 or more people. System will not reduce TDS, sulfur, or iron.

Improve Skin, Hair & Air Quality - Reduce exposure to chlorine & other harmful chemicals that can cause excessive drying, and keep chlorine from evaporating into the air you breathe for cleaner air throughout your home.

Works For All Your Water Needs - System effectively filters water for use in drinking, cooking, showering & bathing. Perfect for households of 4 or more people. No Drainage, back flushing or water-waste.

Instantly Experience Hot Water - Enjoy the comfort and convenience of hot water in your home without the wait.

Energy & Cost Efficient - The most energy efficient circulator on the market that reduces waste and costs associated with the consumption of water.

Fully Automatic Operation - This under sink recirculation system is controlled with a built-in thermostat and timer to conserve water. The pump typically runs three to four times per hour for one to two minutes.

Meets or exceeds the thermal efficiency and/or standby loss requirements

Electronic Ignition

CSA Certified and ASME Rated TandP Relief Valve

Clean Water Straight From Your Faucet - Connects directly to your kitchen sink cold water line without the need for an additional faucet. Only takes a few minutes. Includes system, one carbon block filter, and all parts necessary for installation. No plumber required. Measure your space to ensure unit fits under the sink (3 x 3 x 15.5 inches).

Purifies Water & Reduces 99% of 6 Harmful Contaminants - Basic filtration while leaving in all essential minerals. Reduces chlorine, lead, atrazine, lindane and turbidity. System will not reduce TDS.

Full System Certified To NSF/ANSI Standards 42 and 53 - Product is independently tested by IAPMO & certified to NSF performance standards, ensuring the structural integrity & quality of your entire system, not just the filtration media.

Optional Vent Kit For Gdhe-50

Concentric Vent Kit

Pvc Material

Air-Fuel ratio (AFR) sensor

Exhaust and water temperature safety control

Overheat cutoff fuse

Compact design

Side-Mounted Plumbing and Electrical Connections

Designed for Installation UnderSide-Mounted Plumbing and Electrical Connectionsa Counter

Complies with SCAQMD Rule 1146.2, Southern California and texas Approved

Rated Category 1 Appliance

Included Draft Built-In Blower

Meets or exceeds the thermal efficiency and/or standby loss requirements

Electronic Ignition

CSA Certified and ASME Rated TandP Relief Valve

Complies with SCAQMD Rule 1146.2, Southern California and texas Approved

Rated Category 1 Appliance

Included Draft Built-In Blower

K,GAS VALVE/VENTURI,BTH 199/250,101

40 gallon tank

40,000 BTU

GCR-40 standard vent

40 gallon tank

36,000 BTU gas burner

GCR-40 standard vent

Dynaclean diffuser dip tube-helps reduce lime and sediment buildup, maximizes hot water output

Green Choice gas burner-patented design reduces NOx emissions

Coregard magnesium anode

Dynaclean diffuser dip tube-helps reduce lime and sediment buildup, maximizes hot water output

Green Choice gas burner-patented design reduces NOx emissions

Coregard aluminum anode