Union caps are used to cap off a tubing run, and are handy for testing/troubleshooting, or providing for future expansion. HydroMode cap push-to-connect fittings are designed for potable water and beverages, are NSF-51 and NSF-61 certified and are rated for up to 145psi at 70 degrees C (158F). Bodies and collets are acetal; O-rings are synthetic rubber.
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