BG FILCOTEN® 100 Trench Drain Slot Top Maintenance Unit, 4.84 in. Wide 19.69 in. Long, Asymmetric, Stainless Steel Hanes Geo In the above Picture 2: In the above Picture 2: The barrier was installed a few inches away from the foundation wall to allow for a an occasional visual inspection to ensure that water was not flowing around the barrier and pooling against the foundation wall Scroll down to view the full selection of Inserta Tee connection types The maintenance unit provides easy access inside the unit for cleaning and maintenance Use two Opening Tool for Maintenance Unit (SKU 13399) to remove the inside box nested inside the outer box to remove particles