Drain Time 2 : The time (minutes) it takes for foam solution to drop out from the foam mass; for a specified percent of the total solution contained in the foam to revert to liquid and drain out of the bubble structure
National Wildfire Coordinating Group (NWCG), Glossary of Wildland Fire Terminology, NWCG Program Management Unit, National Interagency Fire Center, Boise, ID, USA 2014. http://www.nwcg.gov/pms/pubs/glossary/pms205.pdf, (For Fr - Amer) {45}
NFPA 1145 Guide for the Use of Class A Foams in Manual Structural Fire Fighting, 2006 ed. (Guide: Use of Class A Foams in Manual Stru Fr Fight - Amer) {386 NFC}