Model I · 2 to 8 inch
Bafter I Skimmer
Arm-mounted floating skimmer in 2-, 3-, 4-, 6- and 8-inch sizes for construction sediment basins.

The Bafter I floats on the basin surface and drains the cleanest water from the top of the pool. A PVC arm with upper and lower flexible hoses connects the skimmer to the outlet structure, so the inlet rides up and down with the water level. An orifice sized for the basin sets the dewatering rate.
- Anti-siphon tube and trash guard
- Upper flexible hose with turnbuckles; rotate the hose during assembly to match its natural arc
- Set over a depression with a stone ring to keep the skimmer off the bottom
- Multiple units can serve one basin, each with its own connection to the outlet structure
Specifications
| Skimmer sizes | 2, 3, 4, 6 and 8 in |
|---|---|
| Orifice sizes | 0.75 to 7.5 in (2 and 3 in also without an orifice) |
| Flow range | 7.9 to 797.4 gpm (0.018 to 1.777 cfs) |
| Maximum pond water depth | 7 ft to overflow for the 10-year storm, with the arm supplied |
| Connection | PVC arm with upper and lower flexible hoses to the outlet structure |
| Inspection | Weekly, as part of the required CEPSCI inspection |
Skimmer selection table
Volumes drained are in cubic feet and are based on an average pond depth of 3 feet. Download the PDF table.
| Orifice | Flow (gpm) | Flow (cfs) | Drained in 1 day (ft³) | Drained in 2 days (ft³) | Drained in 3 days (ft³) | Drained in 4 days (ft³) | Drained in 5 days (ft³) |
|---|---|---|---|---|---|---|---|
| 2-inch skimmer | |||||||
| 0.75 in | 7.9 | 0.018 | 1,555 | 3,110 | 4,666 | 6,221 | 7,776 |
| 1.00 in | 10.8 | 0.024 | 2,074 | 4,148 | 6,221 | 8,294 | 10,368 |
| 1.50 in | 18.6 | 0.041 | 3,542 | 7,084 | 10,627 | 14,170 | 17,712 |
| No orifice | 21.4 | 0.048 | 4,147 | 8,294 | 12,442 | 16,589 | 20,736 |
| 3-inch skimmer | |||||||
| 2.00 in | 24 | 0.053 | 4,579 | 9,158 | 13,737 | 18,317 | 22,896 |
| 2.25 in | 30.8 | 0.069 | 5,962 | 11,924 | 17,885 | 23,846 | 29,808 |
| 2.50 in | 34.1 | 0.076 | 6,566 | 13,132 | 19,699 | 26,266 | 32,832 |
| 2.75 in | 38.8 | 0.086 | 7,430 | 14,860 | 22,291 | 29,722 | 37,152 |
| No orifice | 45.1 | 0.1 | 8,640 | 17,280 | 25,920 | 34,560 | 43,200 |
| 4-inch skimmer | |||||||
| 2.75 in | 49.8 | 0.111 | 9,590 | 19,180 | 28,770 | 38,362 | 47,952 |
| 3.00 in | 57.5 | 0.128 | 11,059 | 22,118 | 33,177 | 44,237 | 55,296 |
| 3.25 in | 62 | 0.138 | 11,923 | 23,846 | 35,769 | 47,693 | 59,616 |
| 3.50 in | 70.6 | 0.157 | 13,565 | 27,130 | 40,695 | 54,259 | 67,824 |
| 6-inch skimmer | |||||||
| 4.00 in | 158.2 | 0.361 | 31,190 | 62,380 | 93,570 | 124,762 | 155,952 |
| 4.50 in | 206.6 | 0.46 | 39,744 | 79,488 | 119,232 | 158,976 | 198,720 |
| 5.00 in | 261.2 | 0.582 | 50,285 | 100,570 | 150,855 | 201,139 | 251,424 |
| 5.50 in | 390.5 | 0.87 | 75,168 | 150,336 | 225,504 | 300,672 | 375,840 |
| 8-inch skimmer | |||||||
| 6.00 in | 419.7 | 0.935 | 80,784 | 161,568 | 242,352 | 323,136 | 403,920 |
| 6.50 in | 512.1 | 1.141 | 98,582 | 197,164 | 295,747 | 394,330 | 492,912 |
| 7.00 in | 736.2 | 1.64 | 141,696 | 283,392 | 425,088 | 566,784 | 708,480 |
| 7.50 in | 797.4 | 1.777 | 153,533 | 307,066 | 460,598 | 614,131 | 767,664 |
The sizing aid only reads the manufacturer's table above. Final skimmer and orifice selection is the design engineer's responsibility.
Downloads
- PDF Bafter I — Skimmer Selection Table
- PDF Bafter I — Layout Detail, 2, 3 & 4 inch
- PDF Bafter I — Layout Detail, 6 & 8 inch
Specification language
Copy into your plan notes or project specifications, then fill in the skimmer and orifice sizes.
Surface skimmer shall be a Bafter Skimmer Model I, ___-inch, with a ___-inch orifice, as manufactured by Bafter, LLC, Tigerville, SC. The skimmer shall dewater the basin from the water surface through a PVC arm and upper and lower flexible hoses connected to the outlet structure, and shall include an anti-siphon tube and trash guard. Maximum pond water depth is 7 ft to overflow for the 10-year storm with the arm supplied. Set the skimmer over a depression with a stone ring to keep it off the bottom. Where a second skimmer is required, each unit shall have its own connection to the outlet structure. Inspect skimmers weekly as part of the required CEPSCI inspection.