Propane characteristics Safety reminders If you smell gas Uncapped lines Safety relief valve Read your tank gauge Appliance safety Lighting pilots Maintenance Gas grilling tips Weather emergencies Download PDF version Disclaimer       The dangers of uncapped lines Leaks that occur from open lines are extremely dangerous due to the potential for a large volume of gas to be released over a short period of time. All lines not attached to appliances must be closed and terminated with threaded caps or plugs. If you have any questions, please call your propane supplier.