MANDERSON Well Drilling

Breaking In Your New Well

 

The biggest problem with a new well is sediment in the water.  To get the sediment out of a well it should be pumped for at least 48 hours straight, at a rate greater than  the maximum pumping rate expected when the system is operating normally.  Throughout the heavy pumping, the pressure gauge on your cold water tank should read 20 psi or less.  if the pump starts sucking air during this heavy pumping, reduce the flow.

 

The faster water moves up the borehole, the more sediment it will remove from the well.  For example, if the speed of a stream or brook is doubled, its ability to move sediment increases six fold.  A stream just capable of moving a piece of gravel weighing 25 grams would be able to move a stone weighing 1600 grams, if the speed of the water was merely doubled.

 

Rusty Casing

 

Rust (iron oxide) forming on the well casing can cause the water to be discoloured if the water has been adjacent to the casing for an hour or two.  This problem is usually worse in the morning because the well has been idle all night.  Most wells only have 10 to 20 feet of casing that is exposed directly to the water.  It is the wells that have more than normal amounts of casing that have the real trouble with rust.  Eventually the rust will become hard and established and will no longer cause a problem.  In the meantime, the more water you pump from these wells the better they will work.   If the pump comes on every hour or so the water will stay clear.

 

Another problem with new wells coliform bacteria.  The coliform often enters the well in micro particles of organics on or in the piping when the pump is installed.  Although the coliform is harmless, your mortgage may require a zero count.

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