Hi Milo, Click on the manuals,ect. at top of page. The window drops down and it should be the third item. Cortez Serial Numbers. Also On the street 90, I just went to the hardware store and bought a 3/4″ galv. street 90 and a galv. plug. Like Moose said just remove the existing plug, screw in the 90 and leave it pointing upwards. You can also reuse the old plug in the 90 if you want. John68
