A pressure tank that is too small
will have to perform more pump
cycles which can reduce the life of
the pump and lead to repair or replacement.
A larger tank size will reduce pump cycles and
extend the pump life and save electricity.
Diaphragm tanks are commonly used on the
discharge manifold to provide water storage
for the system in very low flow situations.
It decreases the running time of the booster pumps,
thereby making the system more energy effective.
A well pressure tank can last from five to 15 years,
as long as yours is well maintained.
If this happens, there is little air left in
the tank to become compressed,
so the pump runs nearly every time water is used.
In addition, too much air in the tank is a problem
because it reduces the space for water storage.
Extra air must be released or the tank will become air-bound.
As stated before, there are three types of tanks:
Air-Over-Water, Diaphragm, and Bladder.
Typically a double diaphragm pump will be
able to run continuously at between 40 and
60 cycles per minute and intermittently
When a well pressure tank goes bad,
the well pump and plumbing inside your
home can suffer harmful consequences.
Problems like water hammer, increased
electricity bills, and well pump failure
can all occur when your pressure tank fails.
So, the rule of thumb is as follows:
take the liquid flow rate of the pump
you're considering and multiply
that number by 0.75. That's the CFM
you'll need for most cases.