Step 4 · Verify the Date

To be extra certain, look for other date indicators. Plumbers often write the installation date on the side of the tank with a permanent marker. This date should be close to the manufacturing date you decoded (usually within a few months). You can also check the ANSI (American National Standards Institute) date on the label, which is a standards certification date. While this is not the manufacturing date, a unit cannot have been made before this date, providing a helpful baseline.

Tools and Materials

Ariston 52 gal. 5500-Watt Residential Electric Water Heater with Durable 316 l Stainless Steel Tank ARIER052C2X055N