A device used in pump inlets or tank fill openings that prevents foreign materials that cannot pass through the pump without causing damage from entering the tank or pump. (See Figure S. I 3). NFPA 1906, 2001 ed
National Fire Protection Association, Illustrated Dictionary of Fire Service Terms, Jones & Bartlett Publishers, MA. USA 2006. https://books.google.com.kw/books?id=W0WIRa3Gl4QC& printsec=frontcover&source=gbs_ge_summary_r&cad=0# v=onepage&q&f=false, (Fr Srvc - Amer) {141}