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Sprinkler system underground leak help Dave FL 11-05-2007
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Posted by JimR on November 5, 2007, 2:24 pm

> Yep, got a leak somewhere. Did the timing thing with the water meter
> and found the three largest zones use most of the water.
>
> My Problem: water bill came to $400.00 one month and $500.00 the next
> month. Stopped using the sprinklers and dropped to $50 - $60/Mo.
> My Guess: underground sprinkler leak
> My Question: What is the easiest way to check the lines for a leak?
> My Answer (up for review): Take out the sprinkler heads in each zone
> and cap off the line, run the sprinkler water and see if meter turns.
>
> Need help to see if this is the best way to check the lines, or will a
> divining rod be better?
> Any comments would be greatly appreciated.
>
> Dave FL

I suppose in FL with our really sandy soil it may be possible to have a big
leak that never shows up on the surface. But before I did a lot of digging
and troubleshooting, I'd first do some calculations and make sure that there
was something wrong.

1. Did your waterbills suddenly go up to $400-$500? What were they before
you began to suspect a leak? Has your county put a surcharge on the water
bills because of the current drought?

2. How much water did you use with irrigation? without irrigation?

3. You should be able to check your water meter while running a single zone
and determine how much water is being put out when that zone is operating.
Knowing the number of heads on each zone and their approximate output you
should be able to calculate an approximate level of water use. If there is
a single source for excessive water use that should become apparent. You
should be able to run each zone, determine how much water it puts out during
its cycle, compare with your calculations, and if there's little
discrepancy, multiply by the number of cycles in a month, and determine your
programmed irrigation amounts. If it's totally out of whack with your
actual usage you need to look further.

4. Once you know how much water is being used during irrigation, you should
be able to determine whether that's an abnormal amount, and then identify
which of the zones is/are causing the problem. If you haven't done so,
recheck the zone settings on the Rainbird to make sure each zone is only
running ~20 minutes, and only on 1-2 x week. If something caused the
controller program to go bad, you could be running the system a lot more
than originally planned.

5. Once you've (a) identified that there actually is a new problem and (b)
identified which zone is at fault, (or perhaps that there is a problem in
the manifold or location that might affect several zones) you can
trouble-shoot that area
.




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Posted by Norminn on November 5, 2007, 6:46 pm
JimR wrote:

>
>
>>Yep, got a leak somewhere. Did the timing thing with the water meter
>>and found the three largest zones use most of the water.
>>
>>My Problem: water bill came to $400.00 one month and $500.00 the next
>>month. Stopped using the sprinklers and dropped to $50 - $60/Mo.
>>My Guess: underground sprinkler leak
>>My Question: What is the easiest way to check the lines for a leak?
>>My Answer (up for review): Take out the sprinkler heads in each zone
>>and cap off the line, run the sprinkler water and see if meter turns.
>>
>>Need help to see if this is the best way to check the lines, or will a
>>divining rod be better?
>>Any comments would be greatly appreciated.
>>
>>Dave FL
>>
>>
>
>I suppose in FL with our really sandy soil it may be possible to have a big
>leak that never shows up on the surface. But before I did a lot of digging
>and troubleshooting, I'd first do some calculations and make sure that there
>was something wrong.
>
>
>
We have the same. Unless the pipes are exceedingly deep, and they
usually aren't in Florida, the water would follow the path of least
resistance .. to the surface.

>
>
>

Posted by Jerry on November 5, 2007, 4:22 pm
> Yep, got a leak somewhere. Did the timing thing with the water meter
> and found the three largest zones use most of the water.
>
> My Problem: water bill came to $400.00 one month and $500.00 the next
> month. Stopped using the sprinklers and dropped to $50 - $60/Mo.
> My Guess: underground sprinkler leak
> My Question: What is the easiest way to check the lines for a leak?
> My Answer (up for review): Take out the sprinkler heads in each zone
> and cap off the line, run the sprinkler water and see if meter turns.
>

No need to remove the sprinkler heads and cap off the risers. Just
close the adjusting screw on the top of the sprinkler popup.

Jerry


Posted by Dave FL on November 5, 2007, 4:40 pm
Jerry wrote:

> No need to remove the sprinkler heads and cap off the risers. Just
> close the adjusting screw on the top of the sprinkler popup.


Sounds MUCH easier

Dave FL


Posted by J.A. Michel on November 6, 2007, 5:31 pm

> Jerry wrote:
>
>> No need to remove the sprinkler heads and cap off the risers. Just
>> close the adjusting screw on the top of the sprinkler popup.
>
>
> Sounds MUCH easier
>
> Dave FL
>

It should be noted that this would work only if you have popup heads, such
as the RainBird 1800 series or similar. It will not work if you have impact
or gear-drive heads.


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