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Module 6: CNG Depressurizing and Defueling

           Lesson 6.4: Required Plumbing for Defueling CNG Vehicles


             Required             ▪  Plumbing
             Components on               o  Defueling receptacle
             Vehicle                     o  Three-way or quarter-turn valve







                                                                                  Defueling receptacle



                                                                                    Three-way valve
























             Typical CNG Fuel
             System Plumbing
             (With Defueling
             Port)








                                        Inside view of fuel module displaying plumbing and three-way valve















                                           NGV Essentials and Safety Practices                                  © 2019 NGVi All Rights Reserved   Page 6-4
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