This #43 burner orifice features a

2-groove identification mark for rapid field verification

Whether you are performing a seasonal tune-up or troubleshooting a pilot that won't stay lit

This part is functionally identical to the Honeywell 310143/U

Weil McLain 560-528-980 Pilot Orifice This #43 burner orifice featuresThe Weil McLain 560 528 980 Pilot Orifice is a precision engineered OEM replacement part specifically calibrated for natural gas (NG) applications. Featuring a precise . 018" diameter aperture, this component is critical for maintaining the specific gas to air ratio required for stable pilot flame ignition in Weil McLain EG boilers and CG series units. A fouled or incorrect orifice can lead to weak pilot signals, frequent nuisance lockouts, or delayed