The answer to 'why is my septic tank slow draining' is that a slow-draining septic tank is often caused by a clogged septic system. This can happen when the septic tank or drain field becomes full of solids, or when the drain field is not draining properly.
Common symptoms of a slow-draining septic tank include drains in the home running slowly, gurgling sounds from plumbing fixtures, and sewage backing up into the home. If left unchecked, a slow-draining septic tank can lead to a complete system failure and expensive repairs.