4" Brass In-line Check FKM 944411V

Soft Seat for Bubble Tight Shutoff, Spring Loaded for Fast Seating Action. 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: +10° to 210°F.  Polyethermide Disc to ensure the Best Resistance For Corrosion and Abrasion.  Patented Disc Guide to Prevent Any Side Loading.  Connection: FNPT x FNPT. Made in Italy  Not lead free NBR for water, oils and general purpose.