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The Caleffi AutoFill 553649A is a filling valve with a half inch sweat inlet and a half inch NPT outlet. This valve includes a pressure gauge for monitoring system pressure, ensuring optimal performance in heating applications.
This filling valve is useful for managing water levels in heating systems while providing clear pressure readings.
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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