Why should a tankless water heater have an isolator/service valve kit installed?.Does a water heater need a shut-off valve?.Why is the water heater older than the house?.What is required clearance for access and working space in front of an electric water heater?.What is the minimum clearance to doors and windows for an outdoor tankless gas water heater?.Is it alright to have a shut-off valve on both the hot and cold water pipes at a water heater?.
Can you wire a 240-volt water heater with 120 volts?.How can I tell if a water heater is HUD-approved for mobile/manufactured homes?.Can you use a light switch for a water heater disconnect?.Is the minimum size water heater inlet pipe 1/2" or 3/4" according to the building code?.Where are gas water heaters not allowed to be installed?.Is a water softener bad for my water heater?.
Because the letter code recycles every 20 years “A,” for example, can be 1964, 1984, 2004. The letters I, O, Q, R, U and V are excluded.
The first letter of the serial number is the one to use. Lochinvar uses a 20-letter code for the year of manufacture of their water heaters.