ENPAC Frameless, Cone Style Storm Sentinel® Catch Basin Insert, 36" X 48" (MPN: 4320)

Description

The ENPAC Frameless, Cone Style Storm Sentinel® Catch Basin Insert is an ideal solution for preventing harmful pollutants from entering storm drains. This frameless model is simple in design, powerful in protection, and one of the most affordable catch basin inserts on the market.

Its frameless design allows you to cut the fabric to size, making installation customizable and easy. The insert sits below the grate, keeping it low-profile and unobtrusive. Made from 8 oz. non-woven geotextile fabric, it prevents contaminated sediment from washing into storm drains while maintaining proper water flow.

Standard versions include overflow bypass ports for high-flow storm events, which help prevent storm water backup around drains. The insert is reusable until it no longer maintains adequate water flow and requires no special tools for installation.

Complies with regulations when used in Storm Water Pollution Prevention Plans, and features an optional oil-absorbing Spilltration® sorbent insert to fully capture oils and hydrocarbons.

Key feature

• Frameless design allows cutting fabric to size
• One-person installation and removal
• Sits below grate for low-profile, unobtrusive placement
• Made with 8 oz. non-woven geotextile fabric
• Prevents contaminated sediment from entering storm drains
• Overflow bypass ports included in standard versions to prevent water backup
• Reusable until water flow is insufficient
• Requires no special tools for installation
• Complies with storm water regulations
• Optional oil-absorbing Spilltration® sorbent insert available
• Options available:
  • 4320-NO (No Overflow)
  • 4320-IB (Oil Absorbing)
    

Specifications

• Material: 8 oz. Non-Woven Geotextile
• Country of Origin: USA
• Dimensions (L x W): 36 in. x 48 in. (91 cm x 122 cm)
• Cone Depth: 18 in. (45 cm)
• Weight: 1 lb. (0.5 kg)
• Flow Rate: 90 gal. (340.69 L) per min. per sqft.
• Load Capacity: 40 lbs. (18 kg)
• Regulations: 40 CFR 122.26, EPA, SPCC, NPDES
  

Videos

Documents

View Catalog Page:
Catalog Page 89

View Product Instructions:
4320, 4326 Storm Sentinel Instructions

View Product Instructions:
BMP Maintenance Log

View SDS:
Oil Only Absorbing Packet SDS

View Regulations:
Codes and Regulations

Shipping & Warranty

Shipping Information

• Manufacture Lead Time: 1-2 Week Lead Time 
  
• Ships From (State): OH
  

Products are subject to freight or parcel shipping costs. Shipping charges are calculated at checkout based on delivery location, product size, weight, and carrier requirements.

Each tank is manufactured and assembled in the USA using high-quality materials and strict quality control standards—built for long-term, dependable use in demanding applications.

Warranty Information

Warranty coverage varies by manufacturer and product type. For warranty details or to initiate a warranty claim, please contact Tank Supply Direct at info@tanksupplydirect.com.

Price Match Guarantee

If you find the ENPAC Frameless, Cone Style Storm Sentinel® Catch Basin Insert (MPN: 4320) offered by an authorized distributor at a lower price within 6 months of purchase, we will match the price and refund the difference.

Contact: info@tanksupplydirect.com