My hens did very well with the nipple waterers. I used to complain about them because I "felt" that they did not provide enough water for my chickens but everyone has told me I was wrong. I believe them but still feel better with waterer cups.
If you are using a bucket, you can use the nipples or cups but if the bucket is not enough, you will need the regulator Mac suggested so you can hook directly to the pressured hose.