U.L. approved strainers for fireline service are designed specifically for applications such as automatic water sprinklers and spray systems in firelines. The very large open area ratio helps prevent problems due to clogging of the screen. These units are available with open areas up to seven times the corrsponding pipe size. This exceeds the AWWA requirements by almost 200%. Whether the need is for a “Y” strainer or a basket strainer, Mueller cast iron fireline strainers from 21⁄ 2″ to 12″ can meet your needs.