The Type XA underdrain maintains its superior air and water distribution with new, patented interior baffles and dual water recovery channels. It also delivers superior uplift resistance (or hold-down) performance without the need for expensive mechanical anchors. The key is Xylem’s patent-pending grout pocket, which fills with grout during installation and assures the Type XA underdrain will not lift from the filter floor, even if internal operating pressures reach 30 pounds-per-square-inch (2 bar).
The innovative dual parallel lateral design and the water recovery channels, both developed by Leopold, give even distribution with less than +/-5% maldistribution and no dead zones.

Technical details

Best uplift resistance – withstands uplift pressures up to 30 psi (2 bar);
Low profile of 8.25” (21cm);
Can be designed for wall feed applications as well as center flume, front flume and Leopold Flat Bottom Flume®;
Superior air and water distribution for effective backwash, giving longer filter runs and lower operating costs;
Handles for quick and easy installation, and snaps together for quick installation;