What component is crucial for controlling flow direction in piping systems?

A check valve is a crucial component for controlling flow direction in piping systems because it allows fluid to flow in only one direction and prevents backflow. This function is essential in many applications to maintain system integrity and operational efficiency. By preventing reverse flow, check valves help avoid potential damage to pumps and other equipment, ensuring reliable operation and protecting the overall system from pressure surges that could lead to failures or leaks.

In contrast, a pressure gauge is used primarily for measuring the pressure within a system, a flow meter measures the rate of flow, and a filter is designed to remove particulates and impurities from the fluid. While all these components serve important roles in a piping system, they do not specifically regulate or control the direction of flow like a check valve does.