A single pipe thermostat must be used in conjunction with which component?

A single pipe thermostat is designed to control a heating or cooling system by adjusting the flow of hot or chilled water through a single pipe. This type of thermostat typically operates by sensing the temperature of the air and triggering a component to either increase or decrease the flow of water. In this context, the restrictor plays a vital role.

The restrictor is used to create a pressure drop in the system, which helps regulate the flow of water. By limiting the amount of water that can pass through the pipe, the restrictor ensures that the thermostat can effectively control the temperature of the environment it serves. This configuration is essential since a single pipe system relies on proper flow control to maintain consistent temperatures.

In contrast, while components like compressors, valves, and fans are integral to various HVAC systems, they do not directly work with a single pipe thermostat in the same way a restrictor does. Compressors are typically found in refrigerant-based systems, valves control flow in multi-pipe configurations, and fans help circulate air but do not interact directly with a thermostat designed for a single pipe system.