Temperature and Pressure Relief Valves for Potable Hot Water Heaters

What type of safety relief valves are commonly used in potable water heaters and hot water storage tanks?

What is the maximum allowable working pressure for the water heaters mentioned in the text?

Which standard is referred to in the text for safety relief valve requirements for industrial and commercial potable water heaters?

What must the pressure setting of the safety relief valve be in relation to the maximum allowable working pressure of the water heater?

What additional dangers do temperature and pressure safety relief valves protect against?

What type of potable water is used in the heaters mentioned in the text?

What does ASME consider insufficient for vessel protection according to the text?

What causes the pressure element of the temperature and pressure relief valve to open?

What does the temperature sensitive element of the temperature and pressure relief valve consist of?

What is recommended for T&P valves to receive annually according to the text?

Which type of temperature relief device employs a fusible element that allows hot water to escape when it melts at 99°C?

What does the temperature-sensitive device do when it opens at 99°C?

According to HLW-801, where must the pressure relief valves be installed?

What is the condition for installing the valve in the horizontal position with the outlet pointed down?

"The combination temperature and pressure relief valve provides protection for both overpressurization, and dangerously high water temperatures" - what does this statement mean?

The pressure setting for the relief valve(s) should be based on the component with the highest maximum allowable working pressure rating.

Safety relief valves must be connected to an internal pipe in the water heater or a cold water feed line connected to the water heater.

ASME prohibits the installation of relief devices sensitive only to temperature.

The T&P valve operates with a pop action when over-pressurization occurs.

Temperature relief devices must always have additional pressure relief.