This vent meets the "leaks less than one liter" surge requirements of 178.345.10
                    Unit of Measure
                    
               
        
            
                                                                                Package Type | 
                                                                        N/A Each | 
                                                                                Units Per Package | 
                                                                        N/A 1 | 
                                                                                Size | 
                                                                        N/A 3 " | 
                                                                                Vendor Item # | 
                                                                        N/A MC307BT1 | 
                                                                                Weight | 
                                                                        N/A 6 lb | 
                                                                                Mounting | 
                                                                        N/A Swivel Nut | 
                                                                                Pressure | 
                                                                        N/A 30 psi | 
                                                                                Manufacturer | 
                                                                        N/A Girard Equipment | 
                                                                                Betts # | 
                                                                        N/A RVP3ST-30 | 
                                                                                Girard # | 
                                                                        N/A MC307BT1 | 
                                                                                Elastomer | 
                                                                        N/A PTFE |