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The Hoffman 401437 is a float-type thermostatic vent designed for steam systems. This non-vacuum air valve offers reliable venting for medium and large setups. It features a single non-adjustable port with a one-half NPT female thread and a three-quarter NPT male thread, ensuring a seamless installation.
This air valve is ideal for main vent applications, handling temperatures from one hundred forty degrees Fahrenheit to two hundred forty degrees Fahrenheit.
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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