1. Autos

Dual pressure delivery CNG pump

From , former About.com Guides

Public CNG pump for natural gas refueling

This is a dual pressure dispensing pump. It can deliver gas at either 3000 or 3600 PSI. The higher pressure will give a faster, denser fill-up, but be certain that your vehicle can handle the higher pressure. A tag on the fuel door should tell you.

photo © Christine Gable

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