Potter / Amseco Potter Amseco VSR-4 Vane Type Waterflow Alarm Switch with Retard, 4" Pipe Size (Replaces VSR-F) MSRP: Was: Now: $167.65
Potter / Amseco Potter Amseco VSR-3 Vane Type Waterflow Alarm Switch with Retard, 3" Pipe Size (Replaces VSR-F) MSRP: Was: Now: $171.15