Step1: Turn off main gas supply and disconnect electrical power before starting.
Step2: Verify NAT/LP compatibility and correct regulator pressure rating specifications.
Step3: Remove old regulator carefully using proper wrench tools.
Step4: Apply approved pipe thread sealant to all male fittings.
Step5: Install new regulator in correct gas flow direction as marked.
Step6: Tighten all connections securely without over-torquing fittings or threads.
Step7: Restore gas supply slowly, check all joints for leaks using soapy water, ensure safe operation.