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The SHARKBITE UP518A5 is a 3/4 inch poly PEX end plug with an alloy barb, sold in a 5-pack. It is used to cap off the open end of a PEX tubing line in a permanent or temporary configuration. The alloy barb construction provides a secure, leak-resistant termination point without requiring specialty tools or fittings beyond a standard clamp or crimp ring. This plug is suitable for both potable water distribution and hydronic heating systems and is typically installed by licensed plumbers or mechanical contractors during rough-in, system modification, or line isolation work.
The UP518A5 is designed for use in residential and light commercial PEX plumbing and hydronic heating applications. It works in both stainless steel clamp ring systems and copper crimp ring systems, giving installers flexibility based on the tooling already on the job. The poly body is compatible with standard 3/4 inch PEX tubing and is a straightforward, low-cost solution for capping unused branch lines or service ports in a distribution system.
Compatible with 3/4 inch PEX tubing used in potable water distribution and hydronic heating applications. Suitable for use with stainless steel clamp ring systems or copper crimp ring systems.
Installation is performed by licensed plumbers or qualified mechanical contractors. Shut off water supply and relieve system pressure before installing or removing any PEX end plug. Use the appropriate crimp or clamp tool rated for 3/4 inch PEX to secure the ring over the barb. Follow local plumbing code requirements, including applicable IPC or IRC provisions, for PEX terminations in potable water or hydronic 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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