Churn Valve 2 : A manually operated valve that permits the circulation of water from the discharge side to the inlet side of a positive displacement pump by means of a by-pass. See also: By-Pass
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}