The Watts Regulator 4" 791FAH 125# W/1/16" is a high-capacity pressure regulator designed for efficient flow control. With a 4-inch size, it is capable of handling pressures up to 125 PSI, making it suitable for various applications. Constructed from premium materials, this regulator ensures durability and long-lasting performance. The design features standard connections for easy installation and compatibility with existing systems. Compliance with ANSI standards guarantees safety and reliability in operation. Ideal for HVAC systems and industrial applications, this regulator is a dependable choice for maintaining optimal pressure levels.