Water Heater TPR

Has anyone seen this type of TPR valve? Any issues to be aware of? First time I have seen one like this.

TY!:stuck_out_tongue:
Bud Coburn
Action Plus Home Inspections

Not a TPR. Write it up.

What is it and what keeps it from flowing water through the tube?

http://www.watts.com/pages/_products_details.asp?pid=798

http://galleryplus.ebayimg.com/ws/web/330714665776_1_0_1/1000x1000.jpg
Pressure relief only

TY Michael!