Up for sale is a  NOS Zurn Prt# QHAIRT air pressure test gauge 

Check the air pressure of your plumbing system with this Zurn Elkay air pressure tester kit QHAIRT. This kit is used to quickly and easily check for leaks in your piping. It has brass fittings with a test gauge and Schrader valve to test the air pressure. Plus, it comes with a 1" and 1 1/4" MNPT brass adapter to allow for use with Zurn Elkay radiant heating manifolds. This tester has an air pressure rating of up to 180 PSI.