3-inch pitch length matches the original factory specifications

simplifying circuit tracing and secondary component testing

Broad Compatibility: Direct replacement for low pressure switch SWT3018 and SWT03018 in TTA

800 in-lb Output: High torque capacity ensures reliable operation of larger diameter valves under significant pressure drops

This single pressure control is a direct replacement for various M-Series and V-Series ventilators

Viessmann 7839705 Radial Fan 318973-401 3-inch pitch length matches theThe Viessmann 7839705 Radial Fan is a critical combustion blower designed specifically for high efficiency gas condensing boilers. This RG148E 120V replacement fan manages the precise air fuel ratio required for proper modulation and optimal burner performance. As a direct OEM component, it ensures seamless integration with the boilers control logic, preventing ignition failures or flame sensing issues common with non spec blowers. The Viessmann RG148