The answer to 'septic tank slow draining' is that a slow draining septic tank is often caused by a clogged drain field or a full septic tank. Symptoms include water backing up in sinks, showers, or toilets, and slow draining fixtures. Solutions may involve pumping the septic tank, repairing the drain field, or replacing the entire septic system.
If the septic tank is not pumped regularly (every 3-5 years), solids can build up and clog the drain field, causing slow draining. Other common causes include tree roots growing into the system, a crushed or collapsed pipe, or a blocked vent. Homeowners should avoid pouring grease, chemicals, or excessive water down drains to prevent these issues.