Sump Box w/ PVC Grid The inline sump box is designed to act as a silt trap so that if any dirt is washed into the drains then the dirt will travel along the drains and into to sump box settling at the bottom and allowing the clean water to exit the drains into the main sewer system which effectively prevents debris build-up inside the sewer system leading to blockages and a hefty bill if the pipe has to be professionally rodded. Dimensions: Length = 330mm, Height = 260mm, Width = 120mm Price: £18.50 (Excluding VAT at 17.5%) Quantity: