Datasheet summary
Underdrain Plates
Engineering summary from PDF text extraction for Underdrain Plates. Verify every value with the OEM datasheet.
Summary
Product identification
POREX® Underdrain Plates are designed to support sand and multimedia filtration beds in municipal, industrial, and residential water treatment processes. They function as a "false floor" to allow uniform water flow-through in either direction without loss of filtering media, enabling automatic backwashing and improved bed regeneration.
Key Benefits
- Supports bed depths of 20 feet or more
- Overlapping edges for leak-free installations
- Uniform distribution of back flush to increase backwash efficiency
- High strength
- UV resistant
- Long system life
- Easy to install using multiple fasteners
- NSF-61 material certified for drinking water applications
Mechanical / Hydraulic
POREX® Underdrain Plates are available in standard sizes and materials, with custom fabrication options.
Standard Items
| Item # | Dimensions | Weight (Kg) | Material |
|---|---|---|---|
| X-6089 | 29.5 cm x 97.8 cm x 1.9 cm (with 2.54 cm Lap Joint) | 3.63 | Polyethylene (HDPE) |
| X-6091 | 19.2 cm x 97.8 cm x 1.9 cm (with 2.54 cm Lap Joint) | 2.22 | Polyethylene (HDPE) |
| X-6080 | 29.5 cm x 97.8 cm x 2.54 cm (with 2.54 cm Lap Joint) | 4.85 | Polyethylene (HDPE) |
Stock Material (for Custom Fabrication)
- Item # X-21265: 149.9 cm x 128.3 cm x 1.9 cm, Polyethylene (HDPE)
Fabrication Capabilities
- Cutting: Lap joints, mill slots, beveled edges, round-over edges
- Welding: Butt-welds, side-welds
- Drill Holes: As specified in customer’s drawings
Water Permeability (using 11 inches of filter sand)
- Gravity Flow:
- Flow Rate: 1.2 Gal/Min/Sq Ft, Head Loss: 0 Inches of Water
- Flow Rate: 4.8 Gal/Min/Sq Ft, Head Loss: ¼ Inches of Water
- Flow Rate: 6.7 Gal/Min/Sq Ft, Head Loss: ½ Inches of Water
- Backwash Flow:
- Flow Rate: 4.8 Gal/Min/Sq Ft, Head Loss: ½ Inches of Water
- Flow Rate: 9.7 Gal/Min/Sq Ft, Head Loss: 1 Inches of Water
- Flow Rate: 15 Gal/Min/Sq Ft, Head Loss: 1½ Inches of Water
Product Specifications
- Bulk Density: Cubic Foot = 39 pounds
- Pore Volume: 40 - 50%
- Break Point (70°F): 550 pounds/linear foot (line load on 14.6 cm wide span)
- Modulus of Rupture (70°F): 700 pounds/square inch minimum
- Air Permeability: 100 SCFM ± 25% per ft² (mean permeability per plate at 2.54 cm water column)
Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions. Contractual data must always match the OEM PDF revision used on the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.