For piping applications where valves must be changed frequently for repair or replacement, it is best to install valves with what type of ends?

Flanged ends are ideal for piping applications where valves need to be frequently changed for repair or replacement because they allow for quick and easy disconnection and reconnection of the piping system. Flanged connections consist of two flat surfaces with holes for bolts, enabling the valve to be bolted onto the piping without requiring extensive tools or specialized skills. This design facilitates efficient maintenance since the flanges can be easily unbolted, allowing for quick access to the valve.

Unlike threaded, soldered, or welded ends, which require more time and labor to disassemble, flanged connections provide a level of convenience that is crucial in situations where frequent maintenance is anticipated. For instance, threaded ends may be challenging to remove if they become corroded or if excessive force is applied during installation, while soldered and welded connections necessitate heating and certain skill sets for removal, increasing the time and resources needed for valve changes. Thus, flanged ends present a practical solution for ensuring easy maintenance and operational efficiency in plumbing systems.