Originally Posted by scotto-
I'd go the Ultra Grey, after a good cleaning with MEK or acetone. Is that a galvanized pipe cap for your gas cap?
The cap is brass. I used a 3/4" close nipple (brass) tapped into the PVC elbow. The cap is vented and I made a plastic baffle to prevent leakage. The PVC is 2" SDR21, same material as SCH40 but with a thinner wall.