Watts 0009257 Valve Freon with the primary difference being

with the primary difference being the addition of the manual stem on the 200RD4T3M

Built with a sleeve bearing system and rated for all-angle mounting

while the 120-volt specification provides high-torque performance for consistent operation in demanding hydronic loops

If the temperature hits the 180°F threshold

Watts 0009257 Valve Freon with the primary difference beingThe Watts 0009257 is a trade grade 3 4 inch LF25AUB Z3 water pressure reducing valve engineered for rigorous commercial and residential applications. Designed to handle supply pressures up to 300 PSI, this lead free pressure regulator utilizes a cast copper silicon alloy body to ensure compliance with potable water safety standards. It features a serviceable in line design with a replaceable seat module and an integral stainless steel strainer,