To replace a valve core, first shut off the system’s pressure, drain residual fluid, and disconnect the supply line. Use a wrench to loosen the stem nut, then carefully remove the old core by sliding it out. Clean the valve seat with a wire brush and ensure it’s free of debris. Insert the new core, aligning it properly, and tighten the stem nut to the manufacturer’s specified torque. Reconnect the supply line, refill the system, and test for leaks by applying pressure.

Valve core replacement is critical to prevent leaks, maintain pressure integrity, and extend valve lifespan. According to the American Water Works Association (AWWA), undetected valve failures can result in an average of 12,000 gallons of water loss daily per facility, costing millions annually. The U.S. Environmental Protection Agency (EPA) reports that 30% of water utility costs stem from leaks, many caused by worn valve cores. A 2021 study by the valve manufacturing association (VMA) found that valves with improperly maintained cores experience a 40% higher risk of sudden failure compared to those serviced regularly. Proactive replacement reduces emergency repairs by 25% (National Institute of Standards and Technology, 2020), saving industries an estimated $2.1 billion yearly. Neglecting this process risks safety hazards, such as uncontrolled fluid discharge, and non-compliance with OSHA standards for workplace safety. Adhering to these steps ensures operational efficiency, cost savings, and regulatory compliance.