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Posted by Harry K on December 20, 2006, 10:42 pm
spamTHISbrp@yahoo.com wrote:
> jmagerl wrote:
> > My water system is losing pressure causing the pump to come on every 3
> > minutes for about 10 seconds. The leak is somewhere outside the house.
> >
> > The most likely cause would be a leak in the 40 year old galvanized pipe
> > they used to bring the water to the house. (I had a previous leak this
> > spring of that cause).
> >
> > I am out of cash for such a major repair at this time and would like to
> > postpone it till spring (bonus time). So my question would be: Would could I
> > expect to happen if I installed a check valve inside the house? I am mainly
> > interested in reducing the short cycling on the pump. What other failures
> > can cause this problem? If there were a pin hole leak in the pipe, would I
> > see it at the surface? Would I be open to contamination?
> >
> > I expect the fix to be a complete repiping with plastic. I also assume that
> > at some point they would have to pull the pump up to make the attachment.
> > Would it be advisable to replace the pump at that time (40 years old)?
> >
> > I guess water is not free. You pay for it one way or another.
> > The joys of home ownership......
>
> The short cycling is not due to the leak- the on/off setpoints are too
> close, or the tank has too little air in it (if its a bladder type
> tank, the bladder could be shot).
>
<snip>
> Dave
The short cycling most assuredly _is_ due to a leak. He says the pump
runs every 3 minutes. It won't do that unless the pressure is leaking
down. Improper precharge or maladjusted pressure switches only cause
problems when water is being drawn.
Harry K
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