Most hot water tanks manufactured before 2003 have a 6 year warranty against leakage, and most hot water tanks manufactured after 2003 have an 8 year warrant against leakage. If you have extended warranty documentation, then your tank may have a longer warranty.
Note that the major manufacturers usually only include a 1-2 year warranty on other parts.
How to tell how old your tank is
If your tank is manufactured by one of the three most common brands in the Greater Vancouver area (Bradford White, John Wood, or Rheem) then see our guide below.
Bradford white tanks have a serial number that consists of 2 letters followed by 7 numbers. The letters refer to the date of manufacture. The first letter refers to the year. A = 2004, B = 2005, C = 2006, D = 2007, E =2008, F = 2009, G = 2010, H =2011, J = 1992, K = 1993, L = 1994, M = 1995, N = 1996, P = 1997, S = 1998, T = 1999, W = 2000, X = 2001, Y = 2002, and Z = 2003. The second letter refers to the month. A = January, B = February, C = March, D = April, E = May, F = June, G = July, H = August, J = September, K = October, L = November, and M = December.
For example, if your serial number is NB3093251, this would mean your tank was manufactured in February 1996 (because N = 1996 and B = February).
John Wood/ GSW
John Wood hot water tanks start with a letter that reveals how long the warranty against leakage is. P = 3 years, R = 5 years, S = 6 years, T = 7 years, U = 8 years, V = 9 years, W = 10 years, and Y = 12 years.
Following the first letter will be four numbers that refer to the date of manufacture. The first two numbers refer to the year of manufacture. 95 would be 1995, 98 would be 1998, 02 would be 2002, 08 would be 2008, and so on.
For tanks made before 2007, the next two numbers refer to the month of manufacture. 01 = January, 02 = February, 03 = March, and so on. For tanks made in 2008 or later, the next two numbers refer to the week of manufacture. 01 = first week of the year, 02 = second week, and so on.
Serial numbers on John Wood tanks made in 2007 or earlier consist of a letter followed by 10 numbers. For example, a serial number of U0508482157 would mean the tank was made 2005 (the first two numbers are 05), in the month of August (the next two numbers are 08), and includes an 8 year warranty against leakage (the first letter is U).
Serial numbers on John Wood tanks made 2008 and later consist of a letter followed by 4 numbers followed by another letter and 6 more numbers. For example, a serial number of U0923C239421 would mean the tank includes an 8 year warranty against leakage (the first letter is U) and was made in 2009 (the first two numbers are 09) in the 23rd week (the next two numbers are 23) of that year.
Rheem/ Ruud Hot Water Tanks
The first two numbers refer to the month of manufacture (01 = January, 02 = February, and so on) and the next two numbers refer to the year (97 = 1997, 05 = 2005, and so on). This is followed by a letter and 5 more numbers. For example, serial number 0307B94210 would mean the tank was made in March (the first two numbers are 03) of 2007 (the next two numbers are 07).
Remember that while the major manufacturers usually include 6-8 year warranties against leakage, other components are only covered for 1-2 years. If a tank is still covered under warranty, you will still have to pay labour and possibly warranty processing fees as well (unless the company who installed your tank included a labour warranty).
If you have the original invoice for your water heater installation, then the start date of your warranty may be from the date of installation rather than the date of manufacture.
If you your current hot water tank needs to be replaced, give us a call today. Same day installation is usually available.