How to build a water tank with bricks?

1. Gather the necessary materials, including bricks, mortar, and any interior tank linings or coatings you wish to use.
2. Begin by constructing the base of the tank, which will be the foundation and support for the walls.
3. Lay a layer of mortar over the foundation, then lay bricks in a circle around the perimeter, starting from the center of the foundation.
4. Continue building the outer layer of the tank by adding more layers of bricks, butting each one up against the previous layer.
5. Make sure to leave open spaces for ventilation near the top of the tank.
6. Once the exterior walls are complete, begin laying bricks to form an interior wall, separating the interior and exterior of the tank.
7. Allow the mortar to dry before applying any interior coatings or linings.
8. Insert pipes for water intake and outflow, either through the side of the tank or the roof.
9. Connect any pipes and fittings, making sure they are watertight.
10. Fill the tank with water and check for any leaks or other problems.