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AGE of WATER HEATERS
ALTERNATIVE HOT WATER SOURCES
ANODES & DIP TUBES on WATER HEATERS
ANTI SCALD VALVES
APPLIANCE DIAGNOSIS & REPAIR
APPLIANCE EFFICIENCY RATINGS
AQUASTAT CONTROL Functions
BACKDRAFTING HEATING EQUIPMENT
BACKFLOW PREVENTER, HEATER WATER FEEDER
CARBON MONOXIDE - CO
CHECK VALVES, WATER SUPPLY
CLOGGED SUPPLY PIPING
CROSS CONNECTIONS, PLUMBING
DEBRIS in WATER SUPPLY, Water Heater
DRAIN a WATER HEATER TANK
ELECTRIC WATER HEATERS
FLOODED WATER HEATER REPAIR
FREEZE-PROOF A BUILDING
GALVANIC SCALE & METAL CORROSION
GAS BURNER Flame & Noise Defects
GAS FIRED WATER HEATERS
GAS PIPING, VALVES, CONTROLS
HEATING COST SAVINGS METHODS
HOT WATER SUPPLY
HOT WATER IMPROVEMENTS
HOT WATER DELIVERY SPEED UP
HOT WATER EFFICIENCY IMPROVEMENT
HOT WATER PRESSURE EXPANSION RATE
HOT WATER PRESSURE LOSS
HOT WATER PROBLEM DIAGNOSIS
HOT WATER QUANTITY IMPROVEMENT
HYDROGEN SULFIDE GAS
INDIRECT FIRED WATER HEATERS
MANUALS & PARTS GUIDES - HVAC
MIXING / ANTI-SCALD VALVES
NO HEAT - NO HOT WATER: HEATER DIAGNOSIS
NOISE, WATER HEATER
ODORS IN WATER
PIPING IN buildings, Clogs Leaks Types
RELIEF VALVE LEAKS
RELIEF VALVES - Water Heaters
SCALE REMOVAL, WATER HEATERS
SEWER GAS ODORS
SOLAR HOT WATER HEATERS
TANKLESS WATER HEATERS
THERMAL EXPANSION of HOT WATER
THERMOSTATS, WATER HEATER
TIMERS for ELECTRIC WATER HEATERS
WATER HEATER ALTERNATIVES
WATER HEATER ANODES, DIP TUBES
WATER HEATER AIR INLET
WATER HEATER DEBRIS FLUSH
WATER HEATER DRAIN PROCEDURE
WATER HEATER EFFICIENCY
WATER HEATER FLUSH PROCEDURE
WATER HEATER NOISES
WATER HEATER PROBLEM DIAGNOSIS
WATER HEATER COMPARISONS, PROPERTIES
WATER HEATER SCALE
WATER HEATER SAFETY
WATER HEATERS for HOME HEATING USE?
WATER ODORS, CAUSE CURE
WATER PIPES, Clogs Leaks Types
WATER PRESSURE TOO HIGH: DANGERS
WATER PRESSURE LOSS DIAGNOSIS & REPAIR
WATER QUANTITY IMPROVEMENT
WATER SOFTENERS & CONDITIONERS
WINTERIZE A BUILDING
Here we explain how to determine the age of a water heater, we provide a chart that decodes the year of manufacture of water heaters, and we discuss the conditions, maintenance, and factors that affect how long a water heater can be expected to last.
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Water Heater Age Decoding Charts & Tables: Five Methods for Determining how old your water heater actually is
Our photo at page top shows an oil fired water heater with a backpressure problem and other safety concerns like a missing extension tube on that relief valve, and maybe a missing draft regulator and perhaps an oil line that is not protected from damage.
[Click to enlarge any image.]
The data tags (containing the water heater's age) for this heater are hidden by its insulating blanket. Readers who need to determine the age of air conditioning and heat pump equipment should see A/C DATA TAGS.
How can we determine the age of a residential water heater? By looking at and decoding data on the water heater's label.
Nearly all modern water heaters, electric, oil fired, or gas fired, include data tags and stickers that indicate the year and month of manufacture of the water heater.
That doesn't tell you exactly when a water heater was installed in a particular building but it does indicate the age of the water heater itself.
However some manufacturers encode the year and month of manufacture of their water heater in the product's serial number so that the water heater age is not immediately obvious.
Our photo (above left) shows a gas-fired Rheem™ water heater. The label containing the unit's serial number is probably at the water heater top left. The label above the gas control at the water heater bottom typically contains water heater lighting instructions.
1. HVAC Data Tag Decoder Carson Dunlop Associates Technical Reference Guide HVAC & Water Heater Serial Number De-Coding Book
(Oct 11, 2011) sharon said:
need to know about tank warranty
The warranty period and terms of your specific water tank depend on its model, age, and of course proper installation. Typically you can find that information in the installation manual and papers for your unit, or if you don't have that information, you'd contact your heater's manufacturer and give them the model and serial number of your water heater.
(Feb 11, 2013) B Skiba said:
We are worried about our hydronic water heater. Our neighbors had severe water damage when their water heater had a major leak while cold water kept flowing into the heater. Their system is similar to ours. We are going on vacation and wonder if we can turn off the cold water intake so that if the water tank develops a leak, at least we won't have a flood. Can we do this safely?
(Feb 26, 2012) Karen said: I want to know the year of my hot water heater
(Nov 5, 2012) Alexandra said: I am trying to find the age of my Hi Test Hoyt water heater. The serial is A87RNH1373190, model A40HM
(Dec 30, 2012) donna said: trying to find how old water heater is model# 71-40db seaial# rh0900b06241
(Feb 5, 2013) wells said: 64 gal model EXR90-52
(Mar 1, 2013) Lee Harding said: I'm trying to determine the age of my GSW hot water heater.Model 6G505DE1
Serial # 50704 535391. I can't tell from these numbers.
(Mar 21, 2013) beckett said: how do i tell the age of my hot water tank
You can often find the year and month encoded in the product serial number, as we describe in the article above.
(Mar 29, 2013) Anonymous said:
how old is an Envi-ro-temp water heater model#mhe2e30hs035v serial # 9812126163 product# 0820183 Thank you, Cheryl Satterwhite
If we assume that your Envi-ro-temp water heater is an Envirotron product I can give this information from CDA's technical reference cited in our References section:
Envirotron went out of business around 1980 - which would your heater at least 33 years old. The current incarnation of the Envirotron name is a company that provides "green technology education and resources" and has their own website with that name.
There is also Solatherm-Envirotron, 1983
Solar Hot Water System for a Newspaper Building: Final Report
Solatherm Envirotron, 1981 [book about 151 pages)
This company published a number of solar water heater studies and documents.
Is your heater a solar unit?
In any event, from the serial number serial # 9812126163 I would bet your heater was made in year 98, month 12, or December 1998.
Details are at ENVIROTRON WATER HEATER AGE
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