The replacement interval for an LPG (liquefied petroleum gas) regulator depends on several factors, including the manufacturer's recommendations, local regulations, and the condition of the regulator. While there is no fixed time frame, a common guideline is to have the LPG regulator inspected and replaced every 10 to 15 years. However, it is important to regularly monitor the regulator for any signs of damage, corrosion, or malfunction and consult the manufacturer or a qualified professional for specific recommendations.