Lochinvar Water Heater Serial Number Lookup & Age

Only Lochinvar PDF page age 2 listed legacy tank families; the exact printed year map 1993–2012, not an assumed repeating cycle.

The chapter heading lists families ending 2011, but its printed year table includes J=2012. Both facts are disclosed. Older 1979–1992 units are within some family headings but their year mapping is not proved by this table. No 1964/1984 cycle extrapolation is applied to Lochinvar. Six/seven numeric suffix positions are production identifiers, not quantity.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only the 2011-onward tank-family list on Lochinvar PDF page age 2.

The manufacturer chart explicitly lists weeks 01–52 and a fifth-character manufacturing-plant code. It does not publish plant geography or an exact Gregorian date. Do not borrow the other manufacturer group’s week 53 allowance for this chart.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only PDF page age 3 list: Custom Hi-Power, qualifying jacketed tanks, Copper-Fin, Energy Rite, Power-Fin, Mini-Fin, Copper-Fin II, Efficiency+, Intelli-Fin, Solution, Knight/Knight XL, Armor, Shield, Sync, Crest and FTXL; each family’s actual introduction/end dates still apply.

This month alphabet includes I=September, J=October. Do not apply tank/Standard Hi-Power skipped-I months. The source calls E 07 H 00123456 June 2007, but its explicit table maps E=May; the decoder follows the table and exposes the example-caption error. The strict reviewed shapes are the printed 7-character numeric-suffix and 12-character fourth-letter examples. May 2015 is transitional and not automatically assigned to the earlier system.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only the equipment-family list on PDF page age 3 and production year 2015.

In 2015 the manufacturer says the first four characters are WWYY; 2016 onward is YYWW. The prose says 13 characters but both worked serials contain 12, so this source-qualified rule accepts the two documented lengths 12/13. The exact first production week after the May transition is not established; no ISO date/month/day is manufactured from the week.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only the equipment-family list on PDF page age 3; 2016 onward YYWW prefix.

The source says 13 characters while its 2016 example has 12. Both documented lengths are accepted only after family confirmation, with opaque suffix preserved. Week 01–52 is read literally; no plant/model/quantity or exact Gregorian date follows.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only the 1965–1983 serial-layout subsection on PDF page 4 for the listed HF/G-O/PG families.

The month table skips I. The source’s year table also lists 1984–1986, but its prose gives those later products an eight-digit numeric layout; this letter-layout rule stops 1983. No full consumer model is encoded by the date.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Conservative 1984–1986 overlap explicitly covered by PDF page 4 product heading and numeric-layout prose.

The serial subsection says 1984–present, but its family heading says through 1986. Only their unambiguous 1984–1986 overlap is implemented; later equipment needs separate documentation. No lifetime or warranty entitlement is inferred.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only the SB electric-booster section headed 1978–2010 on PDF page 4.

First six digits are production related; digits 7–8 are YY and 9–10 aremonth. The year table includes 2011 despite the 2010 family heading; this conservative rule uses the heading limit and discloses that conflict. No sequence count or manufacture day is inferred.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only the explicit year codes 1970–1981 in the PDF page 4 Copper-Fin table; the family heading extends to 1968 but does not give 1968/1969 codes.

Month has one/two digits and year has one/two letters. No earlier letters are guessed. First position is a month, not a unit/model prefix. The three trailing digits are a production identifier.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.

Only Standard Hi-Power 1974–April 1997 subsection on PDF page age 3; not Custom Hi-Power and not Knight.

This family skips I, so J=September. Its one-letter/6-number/final-letter shape differs from the other equipment-family alphabet. No meaning is assigned to the final letter and no full model is manufactured from it.

Select only after confirming the water heater or boiler family and numbering system described here. Brand ownership alone does not establish this system.