To eliminate water vapor from natural gas, a glycol system can be employed, effectively achieving gas dehydration. This process is essential for complying with most gas sales contracts, as it prevents the formation of hydrates when the gas is cooled within transmission and distribution systems. In the United States, the majority of sales contracts require a limit of 7 lbs/MMcf for water content. In colder climates, it is common to encounter sales requirements ranging from 3 to 5 lbs/MMscf.

Meeting these specifications holds significance in preventing the condensation of water vapor, which could lead to corrosion-related issues in pipelines and equipment. These gas dehydration systems can be referred to by various names such as TEG dehydration, glycol dehydration plant, or glycol system. However, the components used in these systems generally remain consistent across different variations.