1 1/4" TESTanDRAIN Model 2511A with K11.2 Orifice, Thread x Thread, Multi-Position Handle, and Pressure Relief Valve Model 2511A is a 300 PSI-rated single-handed ball valve designed to provide both the test and express drain functions for a wet fire sprinkler system. It saves time, space, and money by eliminating the numerous connections required by the traditional assembly loop. Model 2511A features a tamper-resistant test orifice and sight glass, a tapped port for system access, and a pressure relief valve. Pressure relief valve options include Model 7000 or Model 7000L. It's available in a 1" and 1-1/4" thread by thread (NPT) connection. FM approved & UL listed. Made in America.