this wrot copper pressure fitting is designed to handle the high operating pressures of R-410A

offering a seamless fit for standardized burner mounting configurations

Universal Compatibility: Fits standard 3/4" NPT threads

This genuine OEM component is the primary ignition control module designed to manage critical firing sequences

The 100109253 is strictly for LP (Liquid Propane) configurations

Laars Heating Systems E0088400 Relay R-448A this wrot copper pressure fittingThe Laars Heating Systems E0088400 Relay is a specialized 24V DPNO Lockout Relay engineered for critical safety sequencing in high efficiency boilers and water heaters. As a Double Pole Normally Open component, it provides essential circuit isolation and prevents unsafe operation by locking out the ignition sequence when a fault is detected in the control loop. Designed for compatibility with various Laars boiler parts, this relay is commonly found in