By absorbing the mechanical forces of pull

The rugged Heyco-style design allows for a snap-in installation

These bushings are designed to "bite" and lock permanently

specifically engineered for gas pressure regulator venting

Weil McLain 560-528-989 Orifice By absorbing the mechanical forcesThe Weil McLain 560 528 989 Burner Orifice is a precision engineered OEM replacement part designed specifically for natural gas boiler manifold assemblies. As a veteran grade HVAC orifice, it features a #46 drill size essential for maintaining the correct gas flow rate and BTU input across the burner rack. This 7 16" hex component is built with a 1 8" NPT thread, ensuring a secure, leak free seat within the gas manifold of various Weil McLain CGi and