Posted: Wed Nov 16, 2005 3:38 pm
Yes you can have a metal plug... the steel ones on mcmaster seem to be going for about 3 times what the PVC ones go. Personaly, I wouldn't recomend steel - I'v noticed that their threads are rather rough, and would probably abrade PVC rather effectivly... but the brass ones are definatly out of your price range. (122$ for a 4"!)