Wetline

In cheatgrass the wetline technique has proven to be successful and is equally useful in other light to moderate grass fuels on relatively smooth terrain.

Source: wiktionary

We have used this method in the evening when strip headfires would burn into the wetline, but the backfire would go out.

Source: wiktionary

[…] safety risks associated with the transportation of flammable liquids in unprotected product piping – known as wetlines – on DOT-specification cargo tank motor vehicles.

Source: wiktionary

Perhaps the best example is wetlines. Wetlines are unprotected piping located beneath a cargo tank that is used for the bottom loading of gasoline or other petroleum products. In April 2009, we asked PHMSA how many wetlines incidents occurred since 2000.

Source: wiktionary