Is AO Smith a good brand for water treatment?

A. O. Smith Corporation is one of the world's leading manufacturers of residential and commercial water heating equipment, headquartered in Milwaukee, Wisconsin since its founding in 1874. The publicly traded company (NYSE: AOS) has grown through strategic acquisitions to own major brands including State Water Heaters, Lochinvar, Takagi, Reliance, and Aquasana. A. O. Smith also operates one of the largest water treatment businesses globally, with significant market presence in North America, China, and India.

Where is AO Smith made?

AO Smith is based in United States, headquartered in Milwaukee, Wisconsin.

AO Smith Water Treatment

Q: What warranty does AO Smith offer on water treatment?

AO Smith offers 6-year standard warranty on residential models; 10-year on select ProLine series; commercial warranties vary by model.

Through its Aquasana brand and growing water treatment division, A. O. Smith offers whole-house filtration, reverse osmosis, and water softening systems for residential customers seeking clean, great-tasting water.

Founded 1874 United States 6-year standard warranty on residential models; 10-year on select ProLine series; commercial warranties vary by model Official Website

AO Smith Water Treatment Product Lines

Aquasana (subsidiary) AO Smith Whole House Filters AO Smith Reverse Osmosis

Certifications & Standards

Energy Star UL Listed NSF Certified CSA Certified

Water Treatment How-To Guides

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How to Install a Reverse Osmosis System

Install an under-sink reverse osmosis system for the cleanest drinking water at home -- feed water connection, filter mounting, storage tank, drain saddle, dedicated faucet, and the critical initial flush.

How to Test Your Water Quality

Test your water with DIY strips, reagent kits, or certified lab analysis -- what to test for, how to collect samples, how to read results, and what treatment actually fixes common contaminants.

How to Change Water Filter Cartridges

Swap out sediment, carbon, and specialty cartridges in whole-house and under-sink systems -- the right filters, the right schedule, and the correct order for multi-stage setups.

Common Water Treatment Problems

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Bad Taste or Odor in Water

Water that tastes or smells off -- chlorine, rotten eggs, metallic, musty -- has a specific cause for each type. Identifying what it tastes or smells like is the fastest path to the right fix.

Hard Water Buildup

White, chalky deposits on everything -- faucets, shower heads, glass doors, inside pipes and water heaters. Calcium and magnesium restrict flow, kill efficiency, shorten appliance life. About 85% of US homes have hard water.

Low RO System Output

RO system filling slowly, weak trickle, or running out of water? Clogged pre-filters, worn membrane, low feed pressure, or waterlogged tank. Most fixes are filter replacements or pressure adjustments.