Is a sign of vitality, honesty and joy, especially if conducted in clean, clear water. If the water is muddy, then it means that despite the good conditions some slight regret or disappointment is haunting us.
Dream dictionary: water tank boosted dream meanings
If it is full of dirty water, then it indicates family problems and trouble. If the water is clean, then it announces family happiness.
Dreaming of a watering hole is a sign of peace and rest, and if we also see horses or other animals quenching their thirst, its an indication that we will receive good news, a small inheritance or donation. If the trough we dream of is empty and dry, it predicts minor losses. But a trough is not the best place to quench our thirst, even though water may be clean, we must not forget that water-holes were created for animals, not for men. So if you have a dream drinking from it, be careful you are mistaking the path of happiness: meditate on this and look for other sources to quench the thirst of your spirit or the need for love.
(Tank | Tanning drum | Tannery | Woman) A vat in a dream holds the same interpretation as a tannery, except if a tannery represents an independent woman in a dream, then a vat will represent an inhibited woman. A vat in a dream also represents a bathhouse, death by drowning, or dying under a collapsing structure.