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The A.Y. McDonald 4130-249 Insert Stiffener is designed for use with three-quarter inch Copper Tube Size connections. Made from lead-free plastic, this stiffener is essential for maintaining the integrity of flexible plastic piping systems.
This stiffener supports compliance with plumbing regulations and helps prevent potential leaks.
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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