3/8" PVC fittings?

[intarsiabox]

I looked up the specs and it said that the diameter of the out take is 1/2" but the nipple out is 3/8". I don't have one of these pumps myself but can you just unscrew the 3/8" nipple from the 1/2" pump fitting and then just use standard 1/2" plumbing parts? Are you trying to fit tubing or pipe to the discharge of the pump? I would think 1/2" tubing with 1/16" wall thickness would fit the nipple that comes with it.