McDonnell & Miller FS7-4WL Snap Switch Freon and the spring-return time is

and the spring-return time is also typically under 15 seconds for rapid fire safety response

Do I need to replace both rings at the same time

This genuine Reznor heating part provides the precise millivolt signal required for modern control modules

This unit serves as a direct replacement for Honeywell V4843 and V8843 series valves

Durable thin film nickel sensing element ensures long-term signal stability and resistance to typical environmental contaminants

McDonnell & Miller FS7-4WL Snap Switch Freon and the spring-return time isThe McDonnell & Miller FS7 4WL (Part Number 120301) is a heavy duty, industrial grade liquid flow switch engineered for high demand applications requiring precise flow monitoring. Featuring a 1 1 4" NPT connection and a robust SPDT snap switch, this unit is designed for integration into control circuits that signal alarms, start motors, or cycle pumps. The FS7 4WL is built for durability with an extended paddle arm and trimmable stainless steel