- 90 GPM overflow rate helps avoid ponding.
The Storm Sentinel Insert is the sure way to catch oil and sediment headed into storm drains and sewers. -IB models are equipped with a replaceable oil-absorbent media in a screened bag. The Storm Sentinel guards against any potential discharge. Fits any size rectangular catch basin 16 x 28" to 28 x 36" and round basins 27 - 29". Custom sizes are available. Helps comply with NPDES, 40 CFR 122.26 (1999) when used as Best Management Practice in Storm Water Pollution. Requires no special tools to install. FOB Shipping Point.