Are AO Smith hot water heaters glass lined?

Author: Kennedy Hills  |  Last update: Sunday, January 18, 2026

In 2004, A. O. Smith reaffirmed its mastery of glass lining technology by introducing patented Blue Diamond™ glass coating on its best Conservationist® residential water heaters. Blue Diamond™ provides the ultimate protection… over twice the corrosion resistance compared to industry-standard glass lining.

Are A. O. Smith water heaters glass lined?

A. O. Smith changed the water heater market over 80 years ago by introducing the glass-lined tank for all tank water heaters. By lining the inside of the water heater with glass, heat stays within the tank and protects the steel exterior from rusting and becoming a safety risk.

Do all hot water heaters have glass liners?

The inner portion of a regular water heating tank has a coating which is either Glass Lined, Porcelain Enameled, Vitreous Enameled or Blue Silicon Enameled. All of these linings are commonly used in today's, even yesterday's water heater tanks. The most common linings are the Glass Lined tanks.

Is stainless steel or glass lined water heater better?

Glass lined tanks woo you with their lower initial cost and durable charm, provided you're okay with the occasional maintenance date. Stainless steel, however, courts you with its promise of a long, carefree relationship with minimal upkeep. Think of Your Water Consider the personality of your local water supply.

What is the difference between Rheem and A. O. Smith?

On average, Rheem water heaters have a lifespan of 12-15 years, whereas A.O. Smith units typically last around 10-12 years. This extra longevity means fewer replacements and lower overall costs in the long run. In my years of service, I've noticed that Rheem units require fewer repairs compared toA.O.

A.O. Smith Water Heater Brings Blue Diamond Glass Lining Technology | Water Heater For Bathroom

What is the life expectancy of an AO Smith water heater?

Based on the manufacturer's suggested service life, the average life expectancy of a water heater is about 8 to 12 years. That varies with the location and design of the unit, quality of installation, maintenance schedule and water quality.

Is AO Smith a good brand of water heaters?

Best Water Heater Brands According to Plumbers

The answer is yes and no. Yes, there is a “best” brand, but no, it isn't just one brand. AO Smith, State, and Bradford White are all very dependable brands and are known by professional plumbers for top-quality gas and electric water heaters.

What is the best lining in a hot water tank?

Enamel is one of the most popular solutions for this purpose in water heaters. The techniques for applying enamel layers have been well-established for a long time, and even simple methods such as liquid dyeing followed by heat treatment can be cost-effective.

What holds heat better glass or stainless steel?

Stainless steel has better insulation and impact resistance than glass because its alloy elements improve hardenability and strength. While a glass thermos has greater heat retention properties, it is often more fragile and prone to damage.

How long do glass-lined water heaters last?

Those minerals can eat away at the glass lining and then the steel tank. If you do no maintenance, that process will kill the tank in about 9 to 12 years. But if you put a magnesium or aluminum anode rod in the tank, it attracts the corrosive particles to spare the tank.

Why don't hot water heaters last longer?

Chemicals and minerals in our water can contribute to the corrosion and breaking down of the inside of the tank. The sediment and particulates can then build up and reduce the available water to be heated and used by your home.

Do glass-lined water heaters have anode rods?

In essence, the resilience and adaptability of glass lined tanks have made them a popular choice in various industries. While they are not entirely impervious to corrosion, with the right corrosion protection in the form of Corro-Protec anode rods, these tanks can promise you enduring performance and reliable service.

Do you need a pan under a hot water heater?

The requirement for a drip pan will depend on where in the house the water heater is located. If it is inside the living space of the house or in a non-living space, such as the garage, but at the same floor level as the living space, a drip pan is required.

Are there any recalls on A. O. Smith water heaters?

A. O. Smith Recalls Ultra-Low NOx Water Heaters Due to Fire Hazard. This recall includes 30, 40 and 50 gallon natural or propane gas-fired Ultra-Low NOx emission gas water heaters.

What are A. O. Smith water heater tanks made of?

Smith gas tank water heaters feature innovative technology to improve durability. Many tanks are lined with a glass coating to protect the steel tank from the corrosive effects of water. These tanks incorporate an anode rod that protects and neutralizes harmful elements from damaging the glass lining and steel tank.

Are A. O. Smith water heaters made in China?

The company has 27 locations worldwide, including five manufacturing facilities in North America, as well as plants in Bengaluru in India, Nanjing in China and Veldhoven in The Netherlands. 1874 in Milwaukee, Wisconsin, U.S. U.S. In the past, A. O.

Which is better glass lined or stainless steel?

Glass Lined Steel panel is suitable for the usage under severe environment such as seashore and aerial pollution. tainless Steel panel is vulnerable to severe environment and reduce product life time.

Is it better to boil water in stainless steel or glass?

It is generally better to boil water in stainless steel. Stainless steel is a better conductor of heat than glass, which results in faster boiling times and reduced energy consumption. Additionally, stainless steel is more durable and resistant to bursting or cracking.

Does ceramic or glass hold heat better?

Ceramic Retains Heat Better Than Glass

Conduction is loss of heat through the direct contact of two materials, one of which is a colder than the other. Because ceramic is more porous than glass, conduction occurs slower in ceramic mugs.

Are state water heaters glass lined?

And now, State has made our best even better, by adding the new Blue Diamond™ Glass Coating. Patented Blue Diamond™… Ultimate Protection. At the heart of almost every water heater is a steel tank, protected against the corrosive effects of hot water by porcelain “glass lining”.

Do most residential water heaters use steel tanks lined with?

How well a lining protects the steel tank is primarily based on its thickness and coverage of the steel surfaces. Two of the most popular linings are cement and glass. Cement linings average ½ inch thick and covers 100% of wetted surfaces.

Which is better, Rheem or AO Smith?

Smith heat pump water heaters are three to five times more energy efficient than traditional and tankless water heaters. Even so, Rheem's heat pump water heaters are slightly more efficient than A.O. Smith's heat pump water heaters. Rheem's heat pump water heaters have a UEF rating of 3.45 to 4.07, whereas A.O.

Is Whirlpool and AO Smith the same company?

The addition of the American, Whirlpool, GSW, and John Wood brands make A.O.

Are State and AO Smith the same company?

State Water Heaters, is a brand of A.O. Smith Corporation, which leads the world in the manufacture of water heaters for residential and commercial use.

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