As a Master Gasfitter and U.S. Navy Veteran, I cut through the myths about tankless water heaters in Northern Virginia. The upfront cost is high, but the reasons are non-negotiable: safety and code compliance. Before you hire anyone, you need to know why a simple gas line upgrade in Fairfax, Loudoun, or Prince William County can be the difference between a lifetime of energy savings and a dangerous, code-violating installation. Don't risk your home's safety on a low quote. Read our full guide to understand the critical gas line, venting, and permit requirements that guarantee your tankless unit passes inspection and delivers endless hot water for decades.