Plumb Pak straight stop valve, quarter turn, 5/8 x 7/16 - 1/2 in nominal, compression x compression end, media: water, chrome plated, for hot and cold water applications. Plumb Pak straight stop valve, quarter turn, 5/8 x 7/16 - 1/2 in nominal, compression x compression end, media: water, chrome plated, for hot and cold water applications.