CNG Type 2 Tank DOT Certified 3,000 PSI Model CNG1649-2 and Tank Valve Specifications GGE Capacity 9 @ 3,000 psi Liquid Capacity 120 Liter 16" Diameter x 49" Long with Valve Weight 210 lb You will have to measure your vehicle and order the tanks that best fit your vehicle. We cannot select tanks for you. CNG Tanks are very strong and safe. They are available in different types and pressure ratings. They all must be DOT certified if installed in a Vehicle. All CNG tanks have a 250% safety factor. All CNG tanks have tank valves which have a PRD (Pressure Release Device) which will vent the tank if the pressure reaches about 4,500 psi or if the PRD is heated. The PRD prevents CNG tanks from excessive pressure or heat keeping the tank very safe. The GGE rating for these tanks is the maximum capacity under ideal conditions. You may not be able to fill to the rated capacity. You may only be able fill to .5 to 1.5 GGE less than the rating depending on the size of the tank. If a CNG tank is installed in the trunk or inside a vehicle you must vent the PRD with metal tubing, and bag and vent all fittings from the neck of the tank to the vent fitting. Order our vent kit model CNGVBK, if needed.