Which valve is specifically designed to handle low-pressure conditions in a well system?

The atmospheric relief valve is designed specifically for low-pressure conditions in a well system. This type of valve is essential for preventing negative pressure that can lead to the back siphoning of drinking water and contamination of potable water supplies. When there is a drop in pressure, this valve opens to allow air to enter the system, ensuring that the pressure remains at a safe level.

This function is particularly important in well systems, where fluctuating pressures can occur due to changes in water demand or pumping conditions. By maintaining atmospheric pressure within the system, the atmospheric relief valve helps to protect the integrity and safety of the water supply.

Other valves, such as pressure switches and vacuum breakers, serve different functions. Pressure switches are used to control the operation of pumps based on pressure levels but are not specifically designed for handling low-pressure conditions. Vacuum breakers prevent backflow by allowing air into the system, but they are not the primary device for managing low pressure in well systems. Reduced pressure zone valves are designed to prevent backflow and protect against backpressure but are typically employed in higher pressure situations rather than specifically in low-pressure applications.