Combine pineapple juice, water, tequila, orange liqueur, frozen margarita mix, and limeade in a very large plastic container.  (A large, clean, ice cream pail works great for this recipe)

Cover and freeze at least 24 hours or until frozen to a slushy consistency.

Moisten rims of margarita glasses with lime juice.

Dip into coarse salt.

Pour margarita mixture into glasses.

Garnish with lime wedges.