The VCZZ3100 is a high-quality REPLACEMENT CARTRIDGE, FLTG/MOD manufactured by RESIDEO. With its reliable performance and compatibility with various applications, this replacement cartridge ensures optimal flow control in hydronic systems. Its high-quality construction ensures durability and longevity, making it an essential component for maintaining efficient and effective operation. Easy to install and maintain, this replacement cartridge is a valuable asset for maximizing system performance and ensuring optimal flow control.