How To Check Septic Tank Is Full. The septic tank is there for one main function: Slow draining is probably going to be the first sign you’ll encounter if your septic tank is full.
However, it could also be that you are just seeing the normal operating level of the tank because it refills to optimal level after a few days. The photo shows a concrete septic tank during pumping. All of these issues can cause an unpleasant sewage smell and may start to seep into your property or the land around the storage tank.
If the location of the tank is unknown, check the direction of the large wastewater pipe coming from the toilet.
Is it still possible to tell if the septic tank is full without opening it up? The most obvious indicator is to look out for the pools of water surrounding the system’s drain field. So, never ignore the septic tank’s unpleasant odor. It is done to check how much this enters the septic tank.