Fabco Industries, Inc’s Connector Pipe Screen (CPS) product has been approved for use in public works projects in the county of Los Angeles including coastal communities such as Santa Monica, Marina del Ray and Long Beach by the Los Angeles Department of Public Works (LADPW). Fabco’s CPS device met the criteria laid out by the Los Angeles Regional Water Quality Control Board and will be in the running for major storm water filtration projects in the future. The company is hopeful that their version of the connector pipe screen will become the preferred trash best management practice (BMP) for California coastal communities and other regional markets.
The connector pipe screen (CPS) termed a full capture device was developed for the California market. Its main function is to capture trash that is transported along with stormwater from the streets, through drains, and ultimately out into waterways and beaches. Its’ vertical stainless screen with 5 mm openings is installed inside a typical catch basin drain directly upstream of the connector pipe in such a manner that all the water and trash entering the catch basin must pass through the screening device.
Fabco’s design is based on the general specifications detailed by the County of Los Angeles during their certification process. A vertical opening is provided around the upper perimeter of the screen to allow stormwater to bypass in the event of a large storm or if the screen becomes clogged. Manufactured from 14 gauge, 304-stainless steel sheets, Fabco’s connector pipe screen devices are designed to have a flow capacity greater than the estimated flow rate of the area.
By meeting all of these criteria and more, Fabco has solidified itself as a top prospect for future LADPW catch basin projects.
Connector Pipe Screen Reference
The CPS unit prevents trash and debris from entering the storm drain system during dry weather and moderate storm flows by keeping the trash and debris inside the CB. CPS units are not allowed in CBs at locations where sump conditions exist. The CPS unit shall be designed to retain all trash larger than 5 mm (0.197 inch) in the CB, and shall comply with the following items:
1. The CPS shall be sized, fabricated, and installed conforming to the configurations shown in the CPS Sizing Table 1, Appendices A-1, A-2, A-3, and A-4.
2. The CPS shall not interfere with the operation of an existing or proposed ARS.
3. The CPS unit shall have a sufficient structural integrity to withstand a lateral force of standing water (62.4 lb/ft3 ) within the CB area when the screen becomes 100% clogged. CPS units shall be bolted to the CB walls.
4. CPS units shall be configured with deflector plates or screens preventing trash from falling between the screen and connector pipe. The deflector plate shall be designed to withstand a vertical load of 10 lbs per square foot.
5. The gap at the bottom, sides, and joints of CPS units shall not exceed 5 mm (0.197 inch).
6. The perimeter of CPS units shall include a structural frame for stiffness, a bolting surface for fastening to the CB wall, and support for the opening referred to as the “bypass (Hb)” (see Appendix A-1).
7. All CPS parts/components must be sized to fit through the CB’s manhole opening and/or CB curb opening.
8. The CPS unit may encroach into the manhole opening no more than 4 inches.
9. The CPS frame shall be fabricated from S-304 stainless steel, or an Agency approved equal stainless steel alloy. The Structural members shall have a minimum thickness of 3/16 inches.
10. The CPS screen shall be fabricated from perforated metal of Type S-304 stainless steel, or an Agency approved equal stainless steel alloy. The screen shall have a minimum thickness of fourteen (14) gauge (0.0781 inch) The geometrical opening shape shall have a diameter of 5 mm (0.197 inch).
11. The screen material used shall have at least 45% open area.
12. Any edge of the CPS that is not flush with the wall or floor of the CB shall be smooth with no prongs or jagged edges.
13. The assembly bolts, screws, nuts, and washers shall be fabricated entirely from S-316 stainless steel. The concrete anchor bolts shall use a Red Head Multi-Set II drop-in anchor, SSRM-38, with Type S-316 stainless steel threaded rods, nuts and washers, or Agency approved equal.