I'm right outside of Philly, in Audubon. How about you?
I posted another thread about building a mash tun cooler, and I have both a set of 3/8" brass nipple, ball valve, barbs, etc and a set of 1/2" pieces. The 1/2" brass nipple fits better in the drain plug hole, however I know I could find 5/8" SS washers at a local Fastenal. I just question whether the valve setup will be sturdy enough with a smaller brass nipple.
Any thoughts on this? If you're close enough though I could just pick up the 7/8" washers and be done with it!