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Title: Two-Pound Piping System At Alagasco
Author: Gary C. Youngblood
Source: American Gas Association 1990
Year Published: 1990
Abstract: Almost since the beginning, the gas industry has been using six inches water column or one-quarter pound pressure in piping for residential and multi-family dwellings. (Figure 1.) Appliances were built to operate at this pressure and, generally, a minimum three-quarter-inch pipe was used. In 1961, the two-pound piping concept was investigated for the first time. Alabama Gas began experimenting with two-pound systems in the mid and late sixties. Basically, a two-pound system consists of gas metered at two pounds pressure, with small diameter tubing being used for internal house piping. At or near the appliances, gas pressure is reduced to six inches water column by a regulator. (Figure 2.) There are several advantages in using a two-pound system: Reduced installation costs Opportunities in new markets Improved safety

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