When it comes to septic tanks, there's two different types that you can consider having: a gravity flow system or a pressure distribution system that you're gonna have a pump always working. It doesn't mark a heavy rain you have, you're still gonna have your system functioning. The gravity flow system, you have a leash line that floats by gravity. If your leash line is oversaturated. Your septic tank is not gonna function the same way you're gonna have backups into your house. Those, those are the symptoms that you need to pump the septic tank.
When you have a mount system or a pressure distribution system, you have a pump pumping the water into your system, that means that you're gonna have more room. It doesn't matter how much it rains, you're still gonna have the effluent. Pumping into your mount system or your pressure distribution system. Remember many things to consider before you installing a septic tank.