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The MALLEABLE 521-320 is a black iron reducing coupling with dimensions of three-eighths inch by one-eighth inch. This fitting is made from quality malleable iron and adheres to the 150# Malleable Iron Threaded Fittings standards. It features female thread connections on both ends, making it suitable for a variety of plumbing tasks.
This coupling is rigorously tested and inspected to ensure reliability for plumbing and piping systems.
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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