It was not long ago when water tank painting required tanks to be drained before work began. Condensation on the exterior made it impossible to paint a tank in service. Even quality coatings would fail duetothe moisture. This was another reason water tank painting was typically confined to summer, even though summer weather leads to peak water demand in most communities. As discussed in a previous post, difficulty developing a coating that adheredwell and cured quickly in winter was another big factor.