One of the most easily identified gas line issues is the smell of gas. These larger leaks have a very distinct odor. However, smaller leaks can go unnoticed for long periods of time which can cause headaches, nausea and respiratory issues, etc. If your water heater or your pool heater isn’t working properly a gas line issue could be to blame. Please note that whenever you smell gas, please call a plumber immediately and let the professionals handle the issue as quickly as possible.