Fixtures & Water Heaters第 66 / 120 题
A storage type water heater is being installed. Which device must be provided on the tank to protect against both excessive temperature and excessive pressure?
a.A combination temperature and pressure relief valve
b.A vacuum relief valve at the top of the tank
c.A backflow preventer on the cold water inlet
d.A pressure reducing valve on the building supply
解析
Every storage water heater must be equipped with an approved combination temperature and pressure relief valve, typically rated to open at 210 degrees F and 150 psi. A vacuum relief valve prevents siphoning of the tank on bottom-fed heaters but does not relieve pressure or temperature. A backflow preventer and a pressure reducing valve address contamination and supply pressure, not tank overpressure or overheating.
法律依据: IPC §504.4免费刷完整 120 道题库 — 无需注册。
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