A healthy signal should stay steady between 2 and 6 microamps

When replacing older or fouled rods

Using it on plastic piping will cause structural failure and leaks

code-compliant entry point

Reznor 39651 Orifice A healthy signal should stayThe Reznor 39651 is a precision engineered #49 Natural Gas burner orifice, designed specifically for technicians servicing Reznor unit heaters. As an authentic OEM component, this natural burner orifice provides the exact flow rate required to maintain the design manifold pressure and BTU input of the heating system. Manufactured from high grade brass to withstand the thermal stress of continuous combustion cycles, the Reznor replacement part 39651