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The Caleffi Autofill Combo with MPN NA573022 is designed for hydronic heating and cooling systems. This unit features a backflow preventer, isolation valves, and a filter housing with a replaceable resin cartridge. It includes an AutoFill pre-adjustable fill valve and is suitable for installation on water inlet piping.
This unit simplifies management of hydronic systems by automatically filling them with water as needed while safeguarding against back-siphoning.
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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