| Specifications | GL 2.5 | GL4 | GL6 PLUS | |
| Tank Volume | 2.5 Gallons | 4 Gallons | 6 Gallons | |
| Dimensions | 14" x 14" x 10¼" | 14" x 14" x 12¼" | 17½" x 17½" x 14½" | |
| Recovery at a 90°F Rise | 8 GPH* | 10.5 GPH* | 12.5 GPH* | |
| Water Connections | ½ inch NPT | ½ inch NPT | ¾ inch NPT | |
| Relief Valve | installed | installed | included | |
| Multi-Directional Mounting | no | no | yes | |
| *Gallons Per Hour - First Hour Recovery | ||||