Pentair Purex CFM/CF/SMBW Tubing Vent (75279) thermometers A union nut like this

A union nut like this is useful because it helps hold the removable plumbing or equipment connection together while still allowing future access for maintenance

or users who prefer to buy treatment products in a more substantial size

This type of part is especially useful during major overhaul or maintenance where exact replacement of a very large original seal is important to restoring dependable closure

and easy to use

Pentair Purex CFM/CF/SMBW Tubing Vent (75279) thermometers A union nut like thisThis service part supports reliable repairs on Purex systems, helping maintain existing equipment instead of replacing a larger assembly. The tubing vent is used on CFM CF SMBW Tubing Vent applications and supports venting and routing in the filter assembly so trapped air can move properly. It is a useful replacement when the existing part is cracked, corroded, stripped, distorted, leaking, missing, or no longer holding the correct operating position.