Sizing a heater for a Caldwell winter
Household size and the overlap of hot-water uses in the busiest hour set the tank size. Put the two numbers into the water heater size calculator, and it hands back a tank size along with the tankless flow a household would need.
A tankless unit works against the temperature of the incoming water. Caldwell’s January low averages 25°F, which puts it in the 52°F band of the tankless flow calculator, a 68°F rise to the 120°F setpoint.
The city permit and water heaters
Caldwell’s plumbing permit form does not list water heaters. Where one is required, the plumber handles the city plumbing permit.
Reading the age off the label
Dating a heater is a matter of its serial number. The serial number decoder takes the brand and that number from the rating label and returns the year built and the heater’s age, which informs a repair-or-replace decision.
If a heater leaks, see leak detection, and if the plumbing behind it needs to change, see repiping, with every other service on the homepage.