The 1” Inlet Ball Valve with Test Port is a key component for 375 reduced pressure principle assembly backflow preventers. Constructed from durable bronze with a stainless steel handle, it functions as the inlet shut-off, providing reliable isolation and flow control, while the tapped test port allows for pressure testing and monitoring during maintenance, ensuring compliance and system safety. Ideal for irrigation, commercial plumbing, and municipal water systems, this ball valve supports winterization, servicing, and proper backflow prevention.