võimelisus takistama vee tungimist tarindisse või läbi selle veesurvestruktuuri, mis vastab tarindit ümbritsevale projekteeritud veesurvestruktuurile
capable of preventing the penetration of water into or through the structure with a water pressure head corresponding to that for which the surrounding structure is designed
Watertight means that the fume cupboard, measuring instrument or device is tightly sealed, attached or installed so that water cannot enter or pass through.
