This OEM 2-pack features 9-1/4 inch ID O-rings with a 1/8 inch thickness

Key Benefits Precise Low-Flow Control: The poppet design ensures steady pressure for both tiny pilot flames and main burner loads

For technicians performing a valve plate replacement or top-end overhaul

This genuine OEM fitting package includes the essential brass ferrule and nut

System Sensor 5621 Detector This OEM 2-pack features 9-1/4The System Sensor 5621 is a commercial grade dual circuit mechanical heat detector designed for high reliability fire detection in environments where traditional smoke sensors are prone to nuisance alarms. This 135F fixed temperature and rate of rise heat detector utilizes two independent circuits to trigger both local alarm systems and auxiliary devices like fans or door closers. The Rate of Rise (ROR) element responds to temperature increases