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The Sioux Chief 637XG721 is a PEX x Compression adapter designed for plumbing applications. This fitting meets ASTM standards and is suitable for connecting PEX piping to a compression fitting. Its construction ensures reliable and durable connections for various plumbing needs.
This adapter is built to connect 1/2 inch PEX to 3/8 inch OD compression fittings. It is ideal for both residential and commercial plumbing installations.
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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