Clog in Crossover
This can happen when fats, oils, grease, and debris build up in the crossover line between the two compartments. Whenever the crossover pipe is clogged, the water level in the first compartment will be high, while the second compartment’s water level will stay normal. This can lead to water overflowing in the first compartment.
Clog in Incoming Line
A clog in the incoming line can quickly cause the lowest plumbing unit in the structure to back up. Identify the backed-up plumbing units. A backed-up unit suggests that the line incoming to that plumbing unit is clogged instead of the interceptor drain incoming line.
Clog in Outgoing Line
Clogs in the outgoing line are relatively easy to identify as it leads in both of the compartments. The clog may be happening in the outgoing line itself or the city’s main drain line. This kind of problem can be prevented by cleaning your interceptor drain and pumped regularly by a drain professional.
Full Interceptor Drain
A full interceptor drain only occurs when fats, oils, grease, and debris have not been removed from the primary compartment on time. This can cause it to spill over into the secondary compartment and potentially clog the crossover, incoming line, and outgoing line.
You can check if the interceptor drain is full by opening its lid and using a pole to gauge the debris’s depth. If the gauge reaches the bottom, then the interceptor drain is full.