The OPW 66V-0492 is designed for use with today’s alternative fuels. It is to be installed on fuel dispensing hoses, and will separate when subjected to a designated pull force. The dual valves seat automatically, stopping the flow of fuel and limiting any fuel spillage, while protecting the dispensing equipment. For proper operation, the OPW 66V-0492 3/4" must always be installed with a “straightening” hose with a minimum length of 12".