Describe the intervals
Say whether it runs briefly at regular intervals or starts unpredictably. Include visible toilet cistern trickling or a dripping connected fixture if already noticed.
Consider the whole connection
An assessment can examine incoming flow and the unit's operating behaviour. Do not open a wastewater unit or adjust internal switches to stop the symptom.
A useful distinction
A brief run at a fixed interval and continuous running are different patterns. Keep them separate because a small recurring inflow can produce one pattern while a discharge or control problem may produce another.