Homemade septic system
I have a small shop behind my house that is on a location that is not accessible to connect to my house septic tank/system. I have a toilet and sink in the shop, I was considering using a 500 gal fiberglas tank as the septic tank and running feeder/distribution lines as with a normal concrete tank.
However, I am not quite sure how to position the inlet and outlet pipes into the tank. I think I remember the inlet pipe needs to be positioned higher than the outlet pipe. Any assistance on this will be helpful. But basically I would like to know how to make the fiberglas tank work as a does a concrete tank.
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Homemade Septic Tank

Now I will note, at least in every area I have ever lived in, all septic systems have to be approved by an inspector, who will come out, do soil tests and do a layout of the field lines ( and tell you how many feet you have to have)