... Flexible hose gets CSA approved for indoor and outdoor use 2) Professional gas hose manufacturer for 10 years 3)Can do ... 100% factory leak tested.Features: 1. Connectors for indoor and outdoor gas piping; 2. High flexibility, withstands corrosion, durable, reliable, ... and won't leak gas if installed incorrectly; 5. For gas mediums such as city gas, petroleum liquefied gas, natural gas, oil, water.