Backflow Preventer Test Kit - backflow preventer test kit
• Lead Free Dielectric Unions • Used to properly connect different metal piping • Prevents the deterioration of the pipe connections and stray induced electrical currents • Unions available in: FIP x SWT, MIP x SWT, FIP x FIP, Flanged • 250 PSI @ 80°F; 125 PSI @ 180°F
I use one in my sealed/conditioned crawlspace (along side a couple of other different sensors) I have there so if the temperature ever drops below 35F I can check the situation and hopefully remedy it before my pipes freeze.
8615510865705 
8615510865705