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Conbraco Model 26-308-28 - 3/4" NPT Brass Gauge Cock - Oswald Supply
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McDonnell Miller SA51-9R - STRAINER ASSEMBLY - Used With D4325A - Oswald SupplyMcDonnell Miller SA51-9R - STRAINER ASSEMBLY - Used With D4325A - Oswald Supply
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McDonnell Miller SA51-9 - STRAINER ASSEMBLY - Used With D4351S - Oswald Supply
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McDonnell Miller SA37-30 - FLOAT ASSEMBLY - Used With D4347 - Oswald SupplyMcDonnell Miller SA37-30 - FLOAT ASSEMBLY - Used With D4347 - Oswald Supply
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McDonnell Miller 6667 - HEAD MECHANISM - Used With D4367, 69 - Oswald SupplyMcDonnell Miller 6667 - HEAD MECHANISM - Used With D4367, 69 - Oswald Supply
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McDonnell Miller 14-B - BLOW DOWN BALL VALVE - Used With D4347, 67 - Oswald SupplyMcDonnell Miller 14-B - BLOW DOWN BALL VALVE - Used With D4347, 67 - Oswald Supply

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Boiler Heating Supplies Controls FAQs

Boiler controls include thermostats, transformers, control boards, low water cut-offs, safety valves, and circulator pumps that regulate and protect the heating system.

A low water cut-off shuts down the boiler's burner if the water level drops too low, protecting the boiler from operating dry and overheating.

Yes. Replacement Argo parts such as control boards, transformers, and wire kits are available for electric boiler systems.

Manufacturers typically recommend testing safety and relief valves at least once a year to confirm they release pressure properly. Always check with manufacturer safety guidelines.