This seal is optimized for McDonnell & Miller 21

this part is compatible with various models across those brands that specify the S1-9951-0931 part number

the extended copper fittings are specifically engineered to dissipate heat

contractors ensure HVAC equipment compatibility and long-term performance in high-demand commercial and industrial environments

Simplified Retrofitting: Standard footprint fits existing mounting holes in most 24V control transformers and relay panels

Robertshaw 1830-702 Pilot Electrode Els PW 17895 This seal is optimized forThe Robertshaw 1830 702 Pilot Electrode is a direct replacement spark ignition electrode designed for intermittent pilot systems and electronic ignition gas valves. Engineered with a specialized 2S 2 ceramic insulator, this component ensures sustained electrical isolation during high voltage sparking sequences. It features a precision spark gap configuration necessary for reliable gas burner ignition in commercial cooking equipment and HVAC furnace