How To Look At A House
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How do I tell the age of a Rheem water heater from the serial number?
Wednesday, September 12, 2018
The third and fourth numbers in the serial number, usually after several letters, is the year of manufacture of a Rheem water heater. So the manufacturer’s data plate below indicates that it was made in 2001.
Newer Rheem water heaters, like the one with the label below, make it easy for you: the manufacture date is stated to the right of the serial number.
By the way, look for the data plate of older Rheem water heaters on the top of the water heater instead of the side. The same serial number system is used as today, but there may be a gap between the first and second numbers. The example below was manufactured in August, 1969.
Also, the Rheem tankless water heaters use the same system of second two numbers in the serial number are the year of manufacture. The one below is 2014.
Rheem has manufactured water heaters under multiple other brand names over the years. Many have been discontinued for years, but a few older water heaters with these nameplates may still be around. If you look carefully at the bottom of the data plate, you will see the name of the actual manufacturer in fine print. This is important to look for, because some retailers have switched manufacturers over the years. Here’s some of them, and they all use the same Rheem serial number code shown above:
• ABS water heaters
• Aqua Therm water heaters
• Citation water heaters
• Energy Master water heaters
• Vanguard water heaters
• Vista Therm water heaters
• Cimarron water heaters
• Coast To Coast water heaters
• Intertherm water heaters
• Lowes water heaters
• Mainstream water heaters
• Miller water heaters
• Montgomery Ward water heaters
• Professional water heaters
• Servi-Star water heaters
• True Value water heaters
To determine the age of another manufacturer/brand of water heater, go to How do I determine the age of my water heater?
To find the age of other home components, go to How can I find out the age of a roof? and How do I determine the age of an electrical panel? and How do I determine the age of my air conditioner? For life expectancies, visit What is the average life expectancy of the components of a house?
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Field Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components. Available at amazon.com for $19.95.
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