Laars Heating Systems RS2105200 O-Ring 320074-702 This is a factory drain

This is a factory drain hole required by ASME code

How do I confirm the 0

Is this fan blade compatible with my existing motor

Check the existing oil type and system pressure ratings before installation

Laars Heating Systems RS2105200 O-Ring 320074-702 This is a factory drainThe Laars Heating Systems RS2105200 Venturi O Ring is a critical sealing component engineered for high efficiency condensing boilers and commercial water heaters. This OEM replacement part ensures a precise, airtight seal between the venturi and the blower assembly, which is vital for maintaining the correct air fuel ratio during combustion. Specifically designed for the Laars NeoTherm series, these o rings prevent vacuum leaks that can lead to