How pumps work


Buying The Right Water Pump For Your Needs Can Be A Tough Choice

The trend prevailing at present is toAnother important factor is the pump's
do-it-yourself, and one of the many taskscapacity to move water. This is actually more
that needs to be done is the purchaseimportant than the HP and is measured in GPM
replacement of the water pump. So it is- gallons per minute or GPH - gallons per
important to know the pertinent facts abouthour. This is mainly dependent on the
them  to  enable  you  make a sound decision.vertical "lift" measured from the bottom of
the tank (where the pump rests) and the
Firstly the price, which can range from $60highest point of discharge. As the distance
to $500 or more, depending on the quality andof "lift" increases, the capacity of the pump
the features available. The capacity of thereduces accordingly. Evaluate the pump's
pump, ranging from 1/6 HP to 1/2 HP, tooability to pass small solids like twigs and
plays a big part in its pricing. As per theleaves  through  without  clogging.
thumb rule, the weakest is the cheapest. The
next decision you need to make is to chooseThe physical make up of the pump also has an
between a pedestal and submersible pump. Botheffect on the price. Parts that will not
have their advantages and disadvantages. Acorrode or wear out fast are ideal, but they
submersible pump is out of sight (underwater)will add to the price. These include
and therefore silent. So it is a bigstainless steel, alloy, cast bronze and
advantage if the basement area is used as aepoxy-coated cast iron housings which are
living room. Being away from the livingpreferred. Do remember to avoid sheet metal.
quarters, it is safer if you have smallPolypropylene and other complex plastics are
children  around.used  in  all  grades  of  pumps.
Pedestal pumps while costing less, have aConsider the length of electric cord required
longer life since the submersible pump liesat the time of purchase. These are normally
in water permanently and is therefore proneavailable in multiples of 5 (up to 25 feet)
to developing faults. Pedestals have a lifebut ask the store to fix a new cord if your
span of around 25 to 30 years whilerequirements exceed this length. Extension
submersibles can serve for as long as 5 to 15cords  should  not  be  used  with  pumps.
years only. Operating conditions vary so much
that manufacturers offer only a year longIf your budget permits, you can also buy
limited warranty. Considering repairs,pumps, which work on fuels other than
pedestals are far easier and cheaper toelectricity. These are useful in emergencies
maintain  than  submersibles.and natural disasters like floods and storms.
This will be a back up pump and will kick
Moving to the switching apparatus, they comeinto action only when the main pump is
in different types. Automatic switches areoverloaded  or  not  functioning.
available in mercury, floats and diaphragms.
While there are other less popular types, beThe decision to have a back up or not really
sure to choose one of these. Automaticdepends on your situation and circumstances.
switches score over manual ones in that theyWhether you need it or not is influenced by
do not require a person to be present tomany factors - the electric supply to your
start or end their operations. This preventsarea, the frequency of flooding and storms,
the catastrophe of flooding or finding theetc. if you have a well appointed home with
taps dry. Even if the water source dries up,luxury furnishings you might want to have a
a manual pump running on "dry" will burnback up since then it will give you more than
itself, while an automatic one will switchmerely keeping your home water free, it will
off once the water level recedes below agive you the peace of mind that is far more
certain  point.priceless.



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