Main valve with pressure relief valve having a lockout feature

A fire suppression sprinkler system, comprising:

• a main conduit;
• at least one branch conduit in fluid communication with the main conduit;
• at least one sprinkler head coupled to the at least one branch conduit;
• and
• an integral valve arrangement for testing and draining the fire suppression sprinkler system in fluid communication with the main conduit, the integral valve arrangement comprising:
• a housing comprising a main valve and a relief valve, the main valve comprising an inlet and a first outlet, and the relief valve comprising a relief inlet in a side wall of the inlet, a relief outlet in a side wall of the first outlet, and a pressure relief system, the inlet and the first outlet being substantially axially perpendicular, the relief inlet and the relief outlet being substantially axially perpendicular;
• wherein the pressure relief system comprises:
• a body abutting walls of the housing;
• a relief member disposed within the body, the relief member comprising an interior end and an exterior end;
• and
• a lever rotatably coupled to the exterior end of the relief member by a connecting mechanism;
• and
• wherein the main valve and the relief valve are housed in the housing of the integral valve arrangement.