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The Armstrong International C5491 is a 3/4 thermostatic air vent designed for efficient air release in heating systems. This vent automatically expels trapped air, enhancing system performance and reducing energy costs.
This air vent helps to prevent corrosion and extends the life of heating equipment.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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