For wastewater or drinking water applications, the U Block™ is a proven design that will provide superior distribution for both water and air, separately or concurrently. Air is distributed evenly across the entire filter bottom area to scour the media, and to provide an air lift which, with the water, removes the released solids from the filter. This dual backwash action provides intense washing energy throughout the filter bed.
Total media cleaning is the key requirement for a filter to function effectively and efficiently under all loading conditions. Backwashing gravity filters is necessary to remove the solids collected by the media during the filtration run. An upward flow of water or a combination of air and water to fluidize and scour the media is required. The effectiveness of this backwash operation is determined by the resulting cleanliness of the media.
For additional information about TETRA underdrain filters in drinking water applications in North America, contact Severn Trent Services' exclusive distributor by clicking here.
Key Benefits:
- Lightweight, easy to handle - reduces installation costs.
- Snap fit, single gasket, bell and spigot joint assembly ensures a tight fit with no leaking.
- Long maintenance-free life.
- No moving or wearing parts.
- No corrosive materials used.
- Easy to adapt to new and old filter designs for either hydralic only or air/water backwash applications.