DO NOT use thread sealant or P.T.F.E. tape on Shower WallNut™ end of shower arm
Stub out to shower arm connection is made outside the finished wall ensuring there are no hidden leaks behind the finished wall.
Stub out with copper tube just like other fixtures
Warning: the Shower WallNut™ system MUST be installed using a copper stub out and #525-16WLB bracket for warranty coverage.