The Inspector's Journal states that there are six major water heater suppliers and each uses a similar method for reporting water heater installation dates. The sticker is generally above the heater's warning labels and next to the energy guide. In other words, there is no set maximum expected service life. This is the reason many inspectors want to be able to give their clients some idea of how old the device is and when they need to begin considering replacement.
The first two numbers represent the month and the second two numbers represent the year. According to the site, the first cycle began in and is represented by the letter A. Don't remove the manufacturer's sticker from the water heater. At the end of the article, there are links to a handy decoding chart at the website Inspectorsjournal. Look at the second letter, which is between letters A and M excluding I to check the month. Your clients need to know the answers to these questions and others. To download the most recent versions of the decoder chart, Click here. Smith umbrella to the State facility. For example, if the first four numbers of the code are , then the water heater was installed in June of With this system, the letters A to M, excluding the letter I, are used to designate the months. Tip If you can't decode the serial number, contact the manufacturer directly. Smith model with the letter signifying the month, followed by a number for the year. Smith Corporation Until , A. If the manufacturer is American Water Heater, the first two digits of the serial code represent the year of installation, and the second two represent the week. Most modern water heaters have a sticker that displays the installation date, but the serial number isn't always easy to decode. Some water heater manufacturers offer multiple brand names that use a similar coding system. The sticker is generally above the heater's warning labels and next to the energy guide. Lochinvar only manufactured four brands of water heater — Lochinvar, Energy Saver, Golden Knight and Knight, and used the identical dating code system used by Bradford-White Corporation. The trick is being able to distinguish the age of water heaters with the same date codes manufactured after These cycles began in with the letter A, therefore the letter A in the first position of a B-W serial number can represent the years , or This makes the task of memorizing the coding methods far less formidable. Fortunately, most home inspectors can do this easily by checking the large yellow energy usage tag on the unit to see which ANSI date is posted there. If not, write down the serial code. Rheem Corporation Rheem Corporation manufactures 20 different brands of water heaters and uses two different serial number series, one that is all numbers and the other which is both letters and numbers. Verifying the installation date doesn't necessarily prove the age of the water heater, since some units are pre-owned, but it does help with making home improvement decisions.
Video about state water heater date code:
This video shows how to light a State select water heater
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