Water Tank

Underground and Overhead Are Opposite

This is the thing most guidance gets wrong, by treating "water tank direction" as one question when it is two.

Underground water belongs in the north-east. That is the water zone, and the north-east is meant to be the lowest and lightest part of a property. A sump there sits with the principle.

An overhead tank belongs in the south-west. A full tank is heavy, and weight held at height belongs over the zone meant to carry weight.

So the north-east is simultaneously the best place for water below ground and among the worst above it. Once the reasoning is clear, the two lists stop needing to be memorised.

The Positions in Order

For an underground tank: north-east first, then north and east. The north-west and west are workable. The south, south-west and south-east are traditionally avoided — the south-east most pointedly, since water storage in the fire zone is the classic opposition.

For an overhead tank: south-west first, then south and west. The south-east and north-west are not preferred. The north, east and north-east are avoided, the north-east most of all.

What Outweighs the Zone

A leak. It carries the same weight in the check above as the best possible position, and that is not an exaggeration for effect.

A leaking tank in the right zone is worse than a sound tank in the wrong one. Persistent damp damages structure, spreads into walls, and causes the kind of slow deterioration that costs far more than any placement question — which is the practical problem sitting underneath the traditional one.

Anyone assessing a property who notes the tank direction and walks past an active leak has the priorities backwards.

Cleaning and Covering

Stored water that is not cleaned periodically is a health matter before it is a Vastu one, and an uncovered tank collects whatever falls into it.

Both are ordinary maintenance, both are cheap, and both matter more to a household than the compass reading of the tank.

When Relocating Is Worth It

An overhead tank in a poor zone is genuinely worth moving when a roof is being redone or the tank is being replaced anyway. Doing it as a standalone job is expensive and rarely justified.

An underground tank in a poor zone is major work — excavation, plumbing, structural. Almost never justified on placement grounds alone. Keep it sealed, sound and clean.

That is the general principle across Vastu: apply the rule when you are building or replacing something, and be far more cautious about undoing what already works.