which helps maintain a strong millivolt signal to the gas valve

Is the junction box required for operation

The Raypak 006021F Roll-Out/Flue Sensor is a safety-critical 150°F fixed-temperature switch engineered for precise thermal monitoring in high-efficiency Raypak boiler parts and pool heaters

while the durable aluminum housing supports multi-positional mounting

The difference is the amount of air the bypass damper must handle

ASCO 8040H6 Solenoid Valve Els PW 17895 which helps maintain a strongThe ASCO 8040H6 is a professional grade 2 way normally closed solenoid valve engineered for fuel gas service in residential and commercial combustion systems. Featuring a lightweight aluminum body and NBR seals, this valve provides reliable low pressure shutoff for natural gas and propane applications. With a 1 8" NPT connection and a 1. 0 Cv flow coefficient, it handles pressures from 0 to 15 PSI efficiently. The 120V 60Hz coil is protected by a NEMA