Provides the test and express drain functions for wet fire sprinkler systems on multi-story installations requiring pressure relief (NFPA 13 and NFPA 13R). 
Features a Pressure Relief Valve with drain pipe. 
•Complies with NFPA 13 and NFPA 13R Requirements 
•Compact, Single-Handle Ball Valve 
•Tamper-Resistant Test Orifice and Sight Glasses 
•300 PSI rated. 
•Relieves Excess System Pressure caused by Surges or Temperature Changes 
•Shipped with Relief Valve and Bypass Drain Ports Plugged to Expedite Pressure Testing