RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

TECHNICAL BULLETIN

BULLETIN 21

DISCOLORED WATER

SYMPTOMS

Rusty, brown, black, or yellow water appearing in the hot water.

CAUSE

Complaints of discolored water are commonly blamed on water heaters and storage tanks, but in fact, it is a rare occurrence for today’s high quality glass lined tanks to have a lining failure significant enough to allow water to contact enough bare metal to discolor the contents of even a small tank.

The most common cause of “rusty” water is a non-toxic iron reducing bacteria, scientifically termed Crenothrix, Leptothrix, and Gallionella. Iron bacteria is commonly found in soil, water wells, water treatment plants and water distribution piping systems where soluble iron exceeds 0.2 ppm, higher levels make conditions even more favorable. Soluble iron in the water provides food for the bacteria. Rusty discolored water is the end result of the bacteria feeding process. Water heaters and storage tanks usually require new anode rods as presence of iron bacteria contributes to premature anode failure.

The requirements for the bacteria to thrive are:

•Elevated level￿ of iron and manganese in the water

•Water with little or no dissolved oxygen

•Temperatures below 138°F

Items that can increase the potential for this bacteria are:

•Water softeners

•Well water

•Long periods of no water movement

TREATMENT

The simplest treatment available is shock-chlorination of the system. This is a surface treatment, and often requires repeated trials in heavily infected systems. The chlorination of a system requires that you follow each step explicitly to avoid an un-treated portion of the piping system from reinfecting another part. See Bulletin 23 for the chlorination procedure.

NOTE

Since rusty water is caused by a bacteria presence and is not caused by the water heater, any treatment would not be considered warranty related.

A.O. Smith Water Products Company

52

Training Department

©2002

Ashland City, Tennessee

 

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A.O. Smith TC-049-R2 manual Discolored Water, Treatment
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TC-049-R2 specifications

The A.O. Smith TC-049-R2 is a highly efficient and reliable water heater designed to meet the needs of both residential and light commercial applications. This gas-fired water heater offers a perfect blend of performance, efficiency, and durability, making it a popular choice among homeowners and business owners alike.

One of the standout features of the A.O. Smith TC-049-R2 is its tankless design. Unlike traditional water heaters with storage tanks, the TC-049-R2 heats water on demand, which means you only use energy when you need hot water. This not only results in lower energy bills but also provides an endless supply of hot water, ideal for households with multiple bathrooms or high hot water demands.

The TC-049-R2 is powered by natural gas, which enhances its efficiency and operating costs. With an impressive energy factor, this water heater is designed to conserve energy without compromising on performance. The unit also boasts a high recovery rate, which means it can quickly replenish hot water, ensuring you’re never left waiting.

Another notable technology in the A.O. Smith TC-049-R2 is its advanced electronic ignition system, which provides reliable start-up and reduces the chance of pilot light issues. Additionally, the unit features a scaled-down footprint, making it suitable for installation in tighter spaces, such as closets or utility rooms, without sacrificing performance.

Durability is a key characteristic of the TC-049-R2, as it is constructed with high-quality materials designed to resist corrosion and withstand typical wear and tear. The unit is equipped with a durable heat exchanger that enhances both efficiency and longevity, ensuring many years of reliable service.

Safety features are also prioritized in the A.O. Smith TC-049-R2. It comes equipped with advanced safety controls that prevent overheating and ensure safe operation. This offers peace of mind for users, knowing that the unit has multiple safeguards in place.

Overall, the A.O. Smith TC-049-R2 is an excellent choice for those seeking an efficient, reliable, and safe water heating solution. Its combination of advanced features, innovative technology, and robust construction makes it a leader in the water heater market, providing convenience and comfort to its users for years to come.
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