Blocked Outside Drain -

Wear heavy-duty rubber gloves, waterproof boots, and eye protection. Drain water is contaminated. Do not smoke or use open flames near manholes (sewer gas—methane—is explosive).

Run a specific appliance (e.g., the kitchen sink) and see if water appears in the nearest external gully. If water backs up instantly, the blockage is close. blocked outside drain

Find the manhole covers in your garden or driveway. Lift them (using a manhole hook or large screwdriver). If the chamber is full to the brim with water, the blockage is downstream of that point. Wear heavy-duty rubber gloves, waterproof boots, and eye