Lochinvar & A.O. Smith 100208661 Flow Switch 320788-704 3/4" outlet)

3/4" outlet)

this is a dedicated steam pressure relief valve

Direct OEM replacement part for Lochinvar and A

non-slip technical connection that maintains calibration over thousands of cycles

This board is technically rated for natural gas 1-stage logic but functions as the controller in many field-converted Modine units

Lochinvar & A.O. Smith 100208661 Flow Switch 320788-704 3/4" outlet)The Lochinvar & A. O. Smith 100208661 Flow Switch, also identified by part number 781621 or alias FS8 W, is a heavy duty liquid flow switch engineered for precise proof of flow detection in high efficiency commercial boiler systems and water heaters. Designed as a direct HVAC replacement part for the McDonnell & Miller FS8 W, this unit features a durable stainless steel #3 paddle configuration to ensure reliable contact closure once the system pump