Capacity of underground
water tank should be 1.5 times that of the overhead water tank capacity
and adhere to the domestic and potable water requirements of the project.
If a single underground
water tank shall be constructed for the entire project, then it should
occupy a central position.
This position should
preferably in the central garden of the project.
Garden can be developed
on the top of U.G.W.T.
Capacity for domestic as
well as potable water can be accommodated in a circular type tank with two
partitions.
Circular R.C.C. tank is
economical compared to the rectangular R.C.C. tank.
Height of U.G.W.T. should
not exceed 60 cm above road level.
Ensure Shahabad water-proofing
treatment below the raft and above the P.C.C.
Provide a sunken pit as
per requirement for foot-valve of the pumping systems.
Provide openings for
chamber cover and suction pipe in the top slab, as per plumbing
consultants drawing.
Ensure a complete box
type water-proofing from the outside of the U.G.W.T. and smooth finishing
water-proofing from inside.
Top of U.G.W.T. should be
finished with smooth I.P.S. water-proofing.
Chharra plaster should be
done from outside of U.G.W.T. over rough Shahabad, before back filling.
Ensure that the outer and
inner compartments for domestic and potable water respectively, are
watertight.
Construct the U.G.W.T.
preferably in the summer, to avoid de-watering and other expenses of
excavation, where water table is at higher level.
