Model II · 4 to 12 inch
Bafter II Skimmer
High-capacity skimmer in 4- to 12-inch sizes, including the 12-inch unit Bafter announces as the nation's largest certified sediment pond skimmer.
The Bafter II is built for large basins and high design flows. Twin floats with stabilizer legs carry the intake at the surface, and a PVC drop pipe and flex hose carry flow to a flanged coupling on the stub pipe supplied with the skimmer. Skimmer size is the drop pipe and flex hose diameter.
- Sizes up to 12 inches for the largest basins
- Two stabilizer legs, trash guard and anti-siphon tube
- Set over a depression with a stone pad directly under the skimmer
- Multiple units can serve one basin, each with its own connection to the outlet structure
Specifications
| Skimmer sizes | 4, 6, 8, 10 and 12 in (drop pipe and flex hose diameter) |
|---|---|
| Orifice sizes | 2.5 to 12 in |
| Flow range | 53 to 2,409 gpm (0.118 to 5.37 cfs) |
| Maximum pond water depth | 5.5 ft for 4, 6 and 8 in; 6.7 ft for 10 and 12 in, with the supplied drop pipe |
| Deeper ponds | Extend the drop pipe to 1.4 times the maximum pond depth |
| Connection | PVC drop pipe and flex hose with flanged coupling to the supplied stub pipe |
| Inspection | Weekly, as part of the required CEPSCI inspection |
Skimmer selection table
Skimmer size is the drop pipe and flex hose diameter. Flows are at the pond water depth shown for each size. Volumes are in cubic feet. Download the PDF table.
| Orifice | Flow (gpm) | Flow (cfs) | Drained in 1 day (ft³) | Drained in 2 days (ft³) |
|---|---|---|---|---|
| 4-inch skimmer at 2.5 ft water depth | ||||
| 2.5 in | 53 | 0.1181 | 10,202 | 20,404 |
| 3 in | 75 | 0.1671 | 14,437 | 28,875 |
| 3.5 in | 166 | 0.3698 | 31,955 | 63,910 |
| 4 in | 217 | 0.4835 | 41,772 | 83,545 |
| 6-inch skimmer at 3 ft water depth | ||||
| 4.5 in | 183 | 0.4077 | 35,227 | 70,455 |
| 5 in | 224 | 0.4991 | 43,120 | 86,240 |
| 5.5 in | 444 | 0.9892 | 85,470 | 170,940 |
| 6 in | 525 | 1.1697 | 101,062 | 202,125 |
| 8-inch skimmer at 3.5 ft water depth | ||||
| 6.5 in | 416 | 0.9269 | 80,080 | 160,160 |
| 7 in | 487 | 1.085 | 93,747 | 187,495 |
| 7.5 in | 899 | 2.003 | 173,057 | 346,115 |
| 8 in | 1,008 | 2.2458 | 194,040 | 388,080 |
| 10-inch skimmer at 4 ft water depth | ||||
| 8.5 in | 725 | 1.6153 | 139,562 | 279,125 |
| 9 in | 816 | 1.8181 | 157,080 | 314,160 |
| 9.5 in | 930 | 2.072 | 179,025 | 358,050 |
| 10 in | 1,552 | 3.4579 | 298,760 | 597,520 |
| 12-inch skimmer at 4.5 ft water depth | ||||
| 10.5 in | 1,165 | 2.5956 | 224,262 | 448,525 |
| 11 in | 1,380 | 3.0747 | 265,650 | 531,300 |
| 11.5 in | 2,266 | 5.0487 | 436,205 | 872,410 |
| 12 in | 2,409 | 5.3673 | 463,732 | 927,465 |
The sizing aid only reads the manufacturer's table above. Final skimmer and orifice selection is the design engineer's responsibility.
Downloads
- PDF Bafter II — Skimmer Selection Table
- PDF Bafter II — Layout Detail
- PDF Bafter II — 12-inch Skimmer Announcement
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 II, ___-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 drop pipe and flex hose with a flanged coupling to the stub pipe supplied with the skimmer, and shall include stabilizer legs, a trash guard and an anti-siphon tube. Maximum pond water depth with the supplied drop pipe is 5.5 ft for 4-, 6- and 8-inch units and 6.7 ft for 10- and 12-inch units; for deeper ponds, extend the drop pipe to 1.4 times the maximum pond depth. Set the skimmer over a depression with a stone pad directly under it. 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.