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Groundwater/rainwater will fill the tank without even having a toilet connected, assuming it's normally buried and not in a desert environment. The manholes on the top of the tank leak... I have personally seen a new, empty tank with no fixtures hooked up to it yet fill with water. I have my doubts about the "gas corrosion thing", since the top of the tank ...


As a retired country plumber, I would advise against suction or pressure systems. They are a no- no in older septic tank installations particularly ones using salt glaze fire clay pipes with cemented joints. Such pipes are very liable to collapse or obstructions produced by fillets of loose cement that clog up the free flow of the flush. Stick to ...

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