For example, the non-return valves may be clogged or if the pump is discharging treated water to a percolation field there may be a problem there. It’s for this reason that we first check for blockages “downstream” of the sewage tank. Sometimes it’s not the pumping station that’s backing up but something outside of the system. We’ll start with the most common causes for pumping stations backing up, and afterwards, look at how wastewater treatment plants and septic tanks can back up. While we work with all types of systems, a few different problems can arise depending on the type of sewage tank. Is it a domestic or commercial system? Is it a septic tank, pumping station, or a wastewater treatment plant? The answer to why your sewage tank is backing up will depend on the type of system you have.
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