Relief pipe end — water heaters: code vs good practice

Code: ≤6″ above floor. Good practice: visible.

Garage install — water heaters: code vs good practice

Code: ignition source 18″ up, unless FVIR-listed. Good practice: meet code.

Leak risk — water heaters: code vs good practice

Code: pan + drain. Good practice: sensor.

Setpoint — water heaters: code vs good practice

Code: no specific requirement. Good practice: 120°F.

Tank life — water heaters: code vs good practice

Code: no specific requirement. Good practice: 8–12 yrs.

Flush — water heaters: code vs good practice

Code: no specific requirement. Good practice: yearly.

Systems · Chapter 24

Water heaters

A water heater is a pressure vessel full of hot water. It needs a relief valve that's piped right, a way to catch leaks and a size that fits the household.

IRC P2804 relief valvesIRC P2801 pansIRC G2408 garagesDOE efficiency

1 of 3Next: Safety →

24.1

Which water heater works?

Tank, tankless or heat pump. The right one depends on fuel, space, household size and how long you'll own the building.

Size for the morning rush.

Side-by-side: gas tank with flue, tankless wall unit, heat-pump tank — FIG. 24.1 · Which water heater works?

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24.2Water heater safety6 drawings
24.3Maintenance and lifespan0 drawings

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Water heaters

Which water heater works?

Gas tank

Electric tank

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