Suburban Water Heater Element Switch 232351 (Fits Most Models) Compatibility:  SF-20/25/30/35/42; SF-20/25/30/35/42Q  SF-20/25/30/35/42F/FQ  SH-35/42; SH-35F/42F  SHD-2542; SHD-2542Q  NT-12/16/20 S/SE; NT-16/20 SQ/SEQ Features Limited 90 Day Warranty