Lawson Aquatics is your only source for large custom-sized main drains. VGB-2008 Compliant manufacturer of custom sized, large area main drain covers.

Special Features include:

• VGB-2008 Compliant
• Replaces ALL existing large area grates
• One certification covers multiple custom-size unblockable grates
• Measured in one inch increments — lengthen, widen or narrow from any direction
• Permanent marking plate attached with flow rates established using ASME's formula for "Q"
• Available in black or white
• Ten-year warranty

*Available in one-inch increments in one direction and no more than 21" unsupported span in the other direction.