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  • Can a septic tank screw up a sonde's signal?

    I spent most of the afternoon looking for a septic tank. I tracked the line from one end of the house to the other (It didn't help that the as-built drawing was wrong), discovered another cleanout and went from there to where the line went vertical at which time I decided to let the HO dig. I got out a bit further and I'm fairly certain I've found the tank but I'm getting readings in a wide area. It's a Spartan locator with the sonde on the end of my cable. 512hz. Where the line turned 90 degrees down was at about 4' or 4 1/2'. The odd readings I was getting said I was anywhere from 4' to 7'. I picked up only low level readings in the area without the batteries in the sonde so I don't think I was getting interference.

    Any help would be greatly apreciated!
    Last edited by Trent2; 08-05-2009, 12:28 AM. Reason: Had to change stuff.....
    www.ClinkscalesSeptic.com

  • #2
    Re: Can a septic tank screw up a sonde's signal?

    Well yes your reading will change once you leave the level pipe and go vertical deeper into the tank.
    Angles greater than 45 degrees will cause you to lose the poles.
    Last edited by Redwood; 08-05-2009, 12:44 AM.
    411 Plumb Appliance Stimulus Package

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    • #3
      Re: Can a septic tank screw up a sonde's signal?

      Right but I usually just loose the signal when I drop into a tank. This time (if it is really the tank) I was getting signal from a wide area.

      How deep should I be able to pick up the sonde in plastic pipe?

      How deep in a cement tank, or a steel tank?
      www.ClinkscalesSeptic.com

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      • #4
        Re: Can a septic tank screw up a sonde's signal?

        Originally posted by Trent2 View Post
        Right but I usually just loose the signal when I drop into a tank. This time (if it is really the tank) I was getting signal from a wide area.

        How deep should I be able to pick up the sonde in plastic pipe?

        How deep in a cement tank, or a steel tank?


        a steel tank is not good for 512hz.

        a cast iron tank is

        you don't use a camera to see what you're up against?

        i haven't used a sonde in years as i would rather use a camera with sonde.

        rick.
        phoebe it is

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        • #5
          Re: Can a septic tank screw up a sonde's signal?

          Originally posted by PLUMBER RICK View Post
          a steel tank is not good for 512hz.

          a cast iron tank is

          you don't use a camera to see what you're up against?

          i haven't used a sonde in years as i would rather use a camera with sonde.

          rick.
          Rick you're a Cad.
          Some of us cannot afford a camera so for now a sonde will have to be the way we best gather information.
          It's no longer like the old days when people were throwing money at a guy with a pipe wrench sticker on his van.

          You hurt my fillings

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          • #6
            Re: Can a septic tank screw up a sonde's signal?

            Thanks Rick.

            It could be a steel tank. They used to use them here frequently as they were easy to get and set.

            No I don't use a camera, I can't afford to buy one. I'd love to have one but I don't get alot of call for one.
            www.ClinkscalesSeptic.com

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            • #7
              Re: Can a septic tank screw up a sonde's signal?

              Go with where you loose the signal as the edge of the tank.
              411 Plumb Appliance Stimulus Package

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              • #8
                Re: Can a septic tank screw up a sonde's signal?

                That's what we thought was going on until we found the 90 turning down. At that point we let the HO dig. I guess I need more experience.
                www.ClinkscalesSeptic.com

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                • #9
                  Re: Can a septic tank screw up a sonde's signal?

                  Originally posted by drtyhands View Post

                  You hurt my fillings
                  Since I promised to not pick on the spelling of those that volunteered to help on my "Build Day", I will simply say I hope your teeth are ok.
                  I love my plumber

                  "My Hero"

                  Welcome, Phoebe Jacqueline!

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