Hi @dzg,
Thank you for your question.
In many cases, a small amount of standing water is completely normal, especially after rain or in systems that are designed with traps to block odours.
If the water level in your inspection pipe remains low and doesn’t rise over time, and if you’re not experiencing any overflow or slow drainage from nearby pipes, then there’s usually nothing to worry about. Residual water can linger for days after rainfall or after water has passed through the system, depending on the slope and layout of the pipes.
However, if the water level stays high even after several dry days, rises during rain, or if you notice gurgling sounds, odours, or sediment in the water, this could indicate a partial blockage or poor drainage further along the line.
To check whether there’s an issue, you could use a tape measure to make note of the current water level inside the pipe and recheck it after a couple of dry days. If it hasn’t dropped, there might be a restriction or blockage that needs further investigation from a plumber.
Let me know if you have further questions.
Jacob
