944409V by Midland | In-Line Check Valve with Viton Seal | High Capacity | 2-1/2" Female NPT x 2-1/2" Female NPT | BrassFeatures: High Capacity Pressures: 1 4" 2": 400 WOG 2 1 2" 4": 175 WOG Compact design Low Cracking Pressure 1 2 PSI Flow Profile Designed to Minimize Head Loss Perfect Seating both at High and Low Pressure Wide Temperature Range: +10F to 210F Patented Disc Guide to Prevent Any Side Loading Not lead free Construction: Soft Seat for Bubble Tight Shutoff Spring Loaded for Fast Seating Action Polyethermide Disc to ensure the Best Resistance For Corrosion