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Coast to Coast Water Heater Age by Serial Number — Free Lookup

Rheem

Enter the serial number from the rating plate (the silver data sticker on the upper side of the tank; on tankless units it is inside the cover on the right side). Works for Rheem, Ruud and Richmond — many Rheem plates also print the manufacture date directly as "MFG. DATE".

How Old Is Your Coast to Coast Water Heater?

Coast to Coast was a hardware store chain, and its store-brand water heaters were built by Rheem Manufacturing — so they use Rheem's date code: month, then year, in the first four digits after any letter prefix. Enter your serial in the free decoder above for an instant answer, or follow the guide below to read it yourself.

Where to Find the Serial Number

Check the rating plate on the side of the tank — a silver or white sticker, usually in the upper half, that lists the model number and serial number together. The date lives in the serial, not the model number. On older tanks the sticker can fade; a phone photo with the contrast bumped usually makes the digits readable.

How the Coast to Coast Serial Format Works

Rheem encodes the date as MMYY — month first, then year — in the first four digits after any letter prefix:

Worked example — R1102B20331:

  • R = plant code (ignore)
  • 11 = November (month)
  • 02 = 2002 (year)
  • B and the remaining digits = production sequence
  • Result: manufactured in November 2002

Letter prefixes are plant codes. Serials often start with R, RH, RN, RHNG, or a single letter — none of these are part of the date. Skip them and read the first four digits you find.

Why Your Coast to Coast Water Heater's Age Matters

  • Age is the headline. The chain closed in the late 1990s, so a working Coast to Coast tank is a 25+ year old tank on borrowed time. Knowing the exact date tells you how much risk you are carrying.
  • Lifespan. Tank water heaters average 8–12 years of service. Past that, internal corrosion makes tank failure — and a flooded floor — far more likely.
  • Home inspections. If you just bought an older home with a Coast to Coast tank, plan for replacement in the first year; it will be a flagged item on any inspection.

Sources

Brand ownership and serial format verified against the InterNACHI water heater dating chart and InspectApedia's Rheem age decoder.

Frequently asked questions

Who makes Coast to Coast water heaters?
Coast to Coast was a hardware store chain that sold water heaters under its own name, and its tanks were built by Rheem Manufacturing. The InterNACHI water heater dating chart groups the Coast to Coast label with Rheem production lines, so its serials carry the same month-year date code as Ruud and Richmond units.
How do I tell the age of a Coast to Coast water heater from the serial number?
After any leading letter prefix, the first two digits are the month and the next two are the year. For example, serial R1102B20331 means November 2002 — month 11, year 02. Letters before the digits are plant codes; the date always follows them.
Where is the serial number on a Coast to Coast water heater?
On the rating plate — a silver or white sticker on the side of the tank, usually in the upper half, that lists the model and serial numbers together. If it has faded, photograph it and boost the contrast; the first four digits after any prefix are all you need.
Are Coast to Coast water heaters still sold?
The Coast to Coast chain closed its stores in the 1990s, so any unit still in service is at least 25 years old — well past the typical 8–12 year tank lifespan. If yours is still running, replacement should be a near-term priority.
How long does a Coast to Coast water heater last?
Tank-style units average 8–12 years. A Coast to Coast unit still running today is far beyond that, so plan for replacement before a leak decides for you.