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OT - shocking a well

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Posted by clare at snyder dot ontario do on October 2, 2008, 4:29 am
The water at the cottage is getting stinky and we are getting iron
staining. Looks like time to "shock" the well with bleach.
Problem is, the well head is about 4 feet down out in the yard. Don't
REALLY want to have to dig up the yard to find it -
Well has a submersible pump. Is it possible to "inject" the clorine
into the well through the water line by disconnecting the line from
the one-way valve and pouring bleach into the line? will it run down
the pipe through the pump and into the well? I know it would not do as
good a job as a full flood - but is it possible?

If I get the well-cap dug out and then find a problem with the seal,
or can't get the cap open, it will be open for weeks till we get back
to it. If we manage to get into the well and shock it, we don't want
to close up the hole before we know if it was effective - so again the
hole could be open for quite some time - and freeze-up is just around
the corner in northern ontario - so if we can do it through the pipe
it would be SO much easier.
Just put a fitting in the pipe to adapt to water hose, and with a pump
force chlorine/water mix into the pipe, is my proposal (fiill the
bathtub with water and a few gallons of Chlorox first, and pump it
from the tub)

If this is feasible, I'm thinking of putting a fitting permanently
into the line ahead of the check-valve so it can be easily repeated on
an annual basis to keep the well fresh.
** Posted from http://www.teranews.com  **

Posted by Vaughn Simon on October 2, 2008, 12:25 pm

<clare at snyder dot ontario dot canada> wrote in message

   I guess you are saying that you have access to the foot valve and not the
well casing?  If so, as long as you can get to the well side of your foot valve
what you propose should work.  By all means, it would save you time in the
future to add a port for that purpose.  I have no experience with submersable
pumps, so be sure that your bleach solution will not harm it.  I see no reason
why the solution would not run backwards through the pump (assuming that it is a
centrifugal design that incorporates no flapper valve).

Two thoughts:
  1) Some of the bad taste may be coming from your house's plumbing.  A bleach
treatment that did not include the well might get you through the winter.

  2) For better advice, you might try some home improvement forums.  Better yet,
since wells and pumps tend to be very regional in nature, ask around your local
plumbing/well supply store.  For example, around here, folks shoot down their
wells to clean out the wellpoint.  I don't think that is a common solution.



Posted by EXT on October 3, 2008, 3:34 pm

If you have a foot valve at the bottom of the well, the chlorine will only
stay within the piping and not travel into the well (unless the foot valve

Posted by Vaughn Simon on October 3, 2008, 4:52 pm

   AFAIK that is 100% true.

  In my experience, the foot valve has always been at the top of the well
casing, but my experience is mostly limited to Florida wells which are
relatavely shallow and seldom use submersable pumps.    In fact, my last well
had two foot valves, one going to the main pump and the other to a pitcher pump.
That pitcher pump was a great aid in priming, assured that we had water no
matter what else happened, and made a great yard decoration.

As I said, well practice is a very regional thing.


Posted by clare at snyder dot ontario do on October 6, 2008, 2:01 am

 No foot valve at the bottom of the well as far as I can determine -
there IS a one way valve on the well side of the pressure tank.
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