Jetglas Water Heater Age Tool

Jetglas water heaters carry a name rooted in early American water heating history, originally introduced in 1953 by the Day & Night Water Heater Company as a premium glass-lined tank designation. The term "Jetglas" referred to a proprietary vitreous enamel liner coating the interior of the steel storage tank, providing corrosion resistance and longer service life at a time when liner technology was a key differentiator between brands. Day & Night heavily promoted the Jetglas lining in advertising campaigns, positioning it as a superior alternative to competitors whose tanks were prone to leaking. The brand was manufactured in Collierville, Tennessee, under Day & Night's corporate umbrella, which was absorbed into Carrier's BDP division (Bryant - Day & Night - Payne) in 1974 following a series of corporate mergers beginning with Affiliated Gas Equipment in 1955.

In 1977, Bradford White Corporation formally acquired the Jetglas trademark and assumed production responsibility for Jetglas-branded water heaters, ending the Day & Night era of Jetglas production. Bradford White applied its own established manufacturing processes, quality standards, and serial number system to Jetglas units, meaning that post-1977 Jetglas water heaters are decoded using the same letter-based format Bradford White has used since 1964. The first letter of the serial number encodes the year through a 20-year rotating cycle, and the second letter encodes the month of manufacture using a standardized A-through-M mapping. Bradford White's engineering expertise and domestic manufacturing base in Middleville, Michigan gave Jetglas-labeled products the same internal reliability found across Bradford White's own product lineup.

Jetglas branded units are now considered legacy or vintage water heaters, as Bradford White has marketed its products primarily under the Bradford White name for decades. Owners of older Jetglas units can contact Bradford White for parts support and technical information. Because any Jetglas unit manufactured after 1977 uses Bradford White's serial encoding, the manufacture date can be determined from the first two letters of the serial number using the same year-month letter chart. Jetglas units manufactured before the Bradford White acquisition may use Day & Night serial formats, which differ significantly and are less thoroughly documented.