Dwyer Instruments SFI-100-1/2 Indicator 320819-301 preventing water backup that can

preventing water backup that can lead to furnace short-cycling and the common Rheem error 59

this 3-blade propeller is designed to move a high volume of air while maintaining a low noise profile

As a veteran tech

The unit features a plated housing that protects the internal diaphragm and snap-acting switch

this motor ensures near-instantaneous response to temperature adjustments within the primary loop

Dwyer Instruments SFI-100-1/2 Indicator 320819-301 preventing water backup that canThe Dwyer Instruments SFI 100 1 2 is a field proven midwest sight flow indicator designed for immediate visual verification of fluid movement. Integrated with a 1 2" NPT female connection, this unit features a single window design with a high visibility rotating impeller that provides clear confirmation of flow rates in both liquid and gas applications. Constructed with a heavy duty bronze body and a tempered glass window, it is built to withstand the