A small (50- to 60-gallon)
storage tank is usually sufficient
for one to two three people.
A medium (80-gallon) storage
tank works well for three to four people.
A large tank is appropriate
for four to six people.
There is no such thing as a pressure tank
that's too large. And,
because larger pressure
tanks have fewer pump cycles,
it can increase the life of your
If your tank is waterlogged,
that means that there is too
much water and too little air in the tank.
The rubber bladder inside
the tank expands and contracts
to keep water and air separate inside the tank.
When this bladder ruptures,
the water and air are no longer
kept separate, and the pressure
inside the tank drops.
Your well tank's pressure should be
set at 2 psi below the pressure switch's
This differs depending on your tank's
pressure settings. Most well tanks
come set at 30/50.
The cut-on pressure for
the well pump is 30 psi,
so the pressure of the tank
should have a pressure
of 28 psi.
When water is pumped into a
tank containing air, the air is
compressed, putting the wate
r under pressure.
The more the air is compressed,
the greater the water pressure.
When the water reaches a
preset pressure, typically
40 to 60 pounds per square inch
(psi), the pump
automatically shuts off.
Both these 10000 litre water tanks,
when full, exert 10000 kilograms or
10 metric tonnes of downward
pressure (assuming 1 litre of
water weighs 1 kg).
When the low setting is reached
the pressure switch tells the water
pump to turn on and more water
is pushed into the tank and house.
The bigger the tank you have the
larger the drawdown (actual amoun
When the low setting is reached the
pressure switch tells the water pump
to turn on and more water is pushed
into the tank and house.
The bigger the tank you have
the larger the drawdown (actual amount of water stored)
you will have.
A larger drawdown
means longer run time and
therefore less cycles.