blockageplumbingseptictoilet
I have a toilet that makes a gurgling noise IF it flushes down. However, at times it will fill up when I flush the toilet and I will see something come up from the bathroom drain. I have tried putting septic tank cleanser through the toilet because I have a septic tank.
What should I do to find and fix the problem?
Turns out the loud noise was caused by water rushing from other fixtures. The house had galvanized steel pipe as the main feed line (off the meter) which had become restricted, so when the toilet could not pull enough water from the main line it sucked it from other lines.
Replacing the galvanized pipe fixed the issue (as well as increased the pressure to the entire house).
I've been a victim of this before. This is bad news.
In my (rare) case, the roof of my apartment building drained to the middle of the building and down the sewer pipes. During phenomenal downpours (twice in five years), the flow of water coming down that pipe was faster than the flow of water leaving the building. The water backed up to the lowest point where it had an exit which was my primary bathroom. It did so with such intensity that water was violently sloshing out of the toilet bowl, the stopper on the sink was forcefully ejected, and the bathtub was backing up at the same time. The only good news in all this mess is that it was fresh water.
Clearly, this is not quite your case. However, it is an indication of the same similar fact: you have a flow going in the wrong direction in your sewer line. Before the astonishingly violent discharge and water flowing everywhere, the toilet would gurgle.
Since it's a septic tank for you, you need that serviced now.
The reason the flushed water level is lower is probably that the siphon link between the bowl and the sewer line isn't being broken.
Best Answer
You have a blockage that is in the main pipe downstream of where toilet and the bathroom drain collect, so it is backing up both of them. Since the chemicals are not doing it, it looks like it has to be augered.