Measuring Septic Tank Liquid Volume

Septic System Installation

To use a PTLevel in a septic system we recommend a slightly different installation method. (You can use a regular pressure chamber, but the thicker liquids can make maintenance harder or clog the the pressure chamber which will provide inaccurate readings).

If you understand how the PTLevel measures liquids, then you can effectively install a PTLevel to measure any "liquid" that has a consistent density. Basically, an air pocket is created in the regular pressure chamber when the pressure chamber is submerged, that air pocket changes pressure based on the weight of the liquid on it.  Since septic tanks have a thicker "liquid" and often have a different lid, we recommend the following installation with an open bottom. If you are installing in a situation when the bottom of the tank has solids, we recommend installing the septic adapter a few inches above this point to prevent clogging. (Fit all pieces together outside of the tank and push the septic adapter into place, there's no need to get your hands messy!)

We can supply you with a septic adapter (instead of a regular pressure chamber) at no additional cost. Please let us know when you are ordering in the comments section of your order, or reach out to us via a support ticket to place your order. Also please note you will need to supply your own 1/2" electrical conduit (purchased from a local hardware store) at a length you determine (based on the depth of your tank).

If you order the septic adapter from us, this is what you will receive. You'll notice the septic adapter is wider at the base to prevent clogging, it is not weighted (it is held in place by conduit you purchase from a local hardware supply store), and the cap is double-sided. One side of the cap is threaded and works as a clamp to secure the tubing to the barb, and the other side is designed to fit regular 1/2" electrical conduit into it. The septic adapter also comes with the white fitting in the picture which does not have to be used, but it can help hold the conduit in place at the top of the tank.

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