Brass Low Lead Swing Check Valve – Female Pipe Threads Backflow Prevention for Potable Water, Oil, Gas, and Diesel Applications 200 PSI Rating Size:3" Swing Check Valve Long Battery Life: Approximately 300 Provides corrosion resistance for Long Battery Life: Approximately 300 hours of continuous use with auto shut off and low power demand (battery included) A garage door port prevents exhaust hoses from being pinched or kinked under the garage door while reducing the loss of heated or cooled air from the building this valve is ideal for use in potable water systems and meets low lead compliance standards The Brass Low Lead Swing Check Valve is perfect for plumbing and heating systems where backflow prevention is essential