Black nipples have NPT (National Pipe Thread) on each side. With a nipple, you can thread anything with female NPT threading of the same size (1/2" fitting for a 1/2" nipple, 3/4" fitting for a 3/4" nipple) and create a secure connection.
Plumbing nipples and other plumbing supplies can be found at www.supplyhouse.com
Plumbing nipples and other plumbing supplies can be found at www.supplyhouse.com
