Do not overlook your propane system. All of the propane system's components have finite lifespan. In various countries, experts who work with this components offer the opinion that gas regulators should be changed out after five (5) years service and hose (e.g the flexible hose pipe connecting your gas stove to copper tubbing if not the entire hose run), after five (5) years. Always use the correct type of LPG gas fittings, regulator and connections. Do not make temporary connections. Also, make sure the hose pipe is gently curved always to prevent links and damage for gas cylinder safety. Even has cylinders should have the valve cleaned and be visually inspect from time to time. Do not use soapy liquid that contains Ammonia solution for gas leakage test, as this is known to cause rusting and make brass steel breakaway.
After every 15 years, your gas cylinder bottles should be changed into a brand new one. Your gas stove and regulator needs periodic maintenance. Call your distributor or repairman and get them checked Instead of doing it yourself.