Grundfos 00335021 Flange Set 319852-301 the control board will often

the control board will often throw a specific flash code indicating an open limit circuit

Key Benefits for Contractors Direct Replacement: Streamlines retrofits for older Johnson Controls M9100 series actuators without needing complex linkage kits

is specifically designed for this application

reducing excess flow noise and energy waste

Grundfos 00335021 Flange Set 319852-301 the control board will oftenThe Grundfos 00335021 is a heavy duty 2 inch NPT flange set designed for seamless integration with high head centrifugal pumps and circulators. Engineered to satisfy ANSI 250# flange pressure ratings, these cast iron components provide the structural integrity required for high pressure commercial hydronic systems. The kit facilitates a secure, leak proof transition between NPT threaded piping and flanged pump housings, ensuring optimal flow dynamics