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The MALLEABLE 521-702 is a three-eighth inch black iron union. This product is built to meet ANSI/ASTM A-197 standards. The pipe threads are compliant with ANSI B1.20.1, ensuring reliable connections. Black iron pipe is utilized in various plumbing applications including water and gas lines.
This black iron union is ideal for plumbing applications with a robust construction meant to handle water and gas lines effectively.
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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