The Storm Sentinel® Catch Basin Insert is a highly effective solution for preventing harmful pollutants from entering storm drains. This frameless model offers a simple, cost-effective design that provides powerful protection against sediment and debris, making it the most affordable catch basin insert available.
Designed for easy customization, the frameless fabric can be cut to fit specific basin sizes. Its low-profile, below-grate installation ensures it is unobtrusive, while the durable geotextile fabric prevents contaminated sediment from washing into drains. This model features no overflow bypass for maximum filtration performance.
Key feature
Frameless design – cut the fabric to size for custom fit
One-person installation and removal – no special tools required
Below-grate placement for a discreet, low-profile setup
Geotextile fabric traps contaminated sediment before it enters the drain
No overflow bypass for full filtration efficiency
Reusable until it no longer maintains adequate water flow
Compatible with Storm Water Pollution Prevention Plans (SWPPP)
Optional oil-absorbing Spilltration® insert for hydrocarbon capture
Available Options:
4320 – Overflow Bypass
4320-IB – Oil Absorbing
Specifications
Material: 8 oz. Non-Woven Geotextile
Country of Origin: USA
Dimensions (LxW): 36 in. x 48 in. (91 cm x 122 cm)
Ships FOB from Caldwell, Idaho (Zip Code: 83605). Freight charges vary depending on destination and shipment size.
Includes a 1-Year Limited Warranty covering defects in materials and workmanship under normal use.
Price Match Guarantee
If you find the ENPAC Frameless, Cone Style Storm Sentinel® Catch Basin Insert, No Overflow, 36" X 48" (MPN: 4320-NO) offered by an authorized distributor at a lower price within 6 months of purchase, we will match the price and refund the difference.