Wheeler Underdrain Liners
All Service Contracting Corp. manufactures the “All Service Liner™” for retro fitting Wheeler Underdrains.
When rehabbing a Wheeler type underdrain system, it is imperative to inspect the underdrain system for certain defects.
All though a Wheeler Underdrain system may have been in service for many years, at the time of the media change out, is when to inspect and reline the Wheeler Underdrain system.
The “ALL SERVICE LINER” is an alternative to a complete underdrain replacement.
Different type of defects can be found during inspection, thimble failure “all though rare”, excessive wear of the concrete hopper, and aggregate exposure, to name a few. When any of these conditions occur, the concrete hopper will lose it’s original shape. It is critical that the concrete hopper maintain it’s original form to allow for the proper positioning of the porcelain spheres. Without proper positioning of the porcelain spheres premature filter failure can occur.
We have saved our clients both time and money with our Wheeler Underdrain Liner Insert. The “All Service Liner” is the most durable Wheeler Underdrain Insert, on the market today. You will notice below that our Wheeler Underdrain Insert, “All Service Liner” is so strong that it supports the weight of a 3/4 ton pickup truck. We dare you to try this with any other Liner on the market today. If you can get any of our competions Wheeler Underdrain Inserts or Wheeler Undedrain Liners to do the same, we will provide you with enough Wheeler Liners Inserts “All Service Liners” for one complete filter absolutley FREE. That is how confident we are that our Wheeler Underdrain Liners “All Service Liner” is much more superior than any others on the market today.
All Service Contracting Corp. will upon request inspect the Wheeler underdrain system to determine the extent of the restoration of the concrete hoppers.
We placed one of our All Service Liners™ under each wheel of a 3/4 ton Chevy Truck to show the durability of the All Service Liners™.
TRY THIS WITH OUR COMPETITION’S LINER
Weight per piece
Pieces per carton
- Ceramic Filtration Balls are NSF Certified to ANSI/NSF 61.
- Parts are sold in even carton quantities.
- Ceramic water filtration balls are made from “Dry Process Porcelain”
- Average Properties of “Dry Porcelain” are as follows…
Water Absorption, % 1.0
Specific Gravity 2.4
Resistance to Impact, Inch-Lbs. 2.4
Tensile Strength, lbs./sq. in. 2,500
Compressive Strength, lbs./sq. in. 40,000
Flexural Strength, lbs./sq. in. 5,000
Wheeler Precast Filter Bottom
The Wheeler Filter Bottom, designed by William Wheeler more than 40 years ago, has gained wide acceptance by consulting engineers and contractors. Present day application of precasting methods to construction of the Wheeler Bottom has substantially decreased installation costs while increasing design flexibility, particularly where vertical space is limited.
The precast Wheeler Filter Bottom consists of precast, reinforced concrete block units supported by concrete piers and grouted in position. The space below the precast blocks and between the piers forms the pressure chamber of the filter. Specially dimensioned porcelain spheres, placed in the pyramidal depressions in the blocks, plus the conventional gravel and sand comprise the filter proper. The precast blocks, Figure 1, are cast of 4000 lb. of concrete, amply reinforced with steel bars. Standard blocks have dimensions 22-1/2. x 23-1/2. x 4. (24. x 24. x 4. modular size) and, when positioned in the filter box conveniently divide the floor space into 2 ft. squares. Where filter dimensions are not exact, multiples of 2 ft. special blocks, 4. thick, can be furnished in the sizes shown in Table 1. By proper arrangement of these sizes, it is possible to adopt precast blocks for use in a filter of any dimension. Inverted pyramidal depressions located at 8. intervals at the top of each block contain one three-inch diameter sphere and four smaller ones. A thimble in the bottom of each depression permits passage of water through the bottom. Each block has a narrow depression in each of the four sides, which acts as a bonding key for grouting adjacent blocks. These openings also provide a gripping surface for tongs, which can be used to handle the blocks.
|ACTUAL SIZE||MODULAR SIZE|
|7 X 23-1/2 X 4||8 X 24 X 4|
|14-1/2 X 23-1/2 X 4||16 X 24 X 4|
|22-1/2 X 7-1/2 X 4||24 X 8 X 4|
|22-1/2 X 23 X 4||24 X 24 X 4|
|30-1/2 X 23-1/2 X 4||32 X 24 X 4|
|31-1/2 X 22-1/2 X 4||32 X 24 X 4|
Rehabilitating wheeler type underdrains
All Service Contracting Corp. provides complete filter media, removal, installation, underdrain tear outs, retrofits, new installations, underdrain inspections, manufactures Wheeler underdrains systems, supplies a wide variety of filter, and filtration products.
When rehabilitating a Wheeler type underdrain system, it is imperative to inspect the under-drain system for certain defects. The Wheeler underdrain system was patented by William Wheeler on Aug. 24, 1915 and has proven to be one of the most reliable underdrain systems in service today. All though a Wheeler underdrain system may have been in service for many years, at the time of the media change out is when to inspect and reline the Wheeler underdrain system. The “ALL SERVICE LINER™” is an alternative to a complete underdrain replacement.
Different type of defects can be found during inspection, thimble failure “all though rare”, excessive wear of the concrete hopper, and aggregate exposure, to name a few. When any of these conditions occur, the concrete hopper will lose its original shape. It is critical that the concrete hopper maintain its original form to allow for the proper positioning of the porcelain spheres, without proper positioning of the porcelain spheres, premature filter failure can occur.
Rehabilitation of the Wheeler type underdrain system, could involve restoring a hopper if required and then the installation of an “ALL SERVICE LINER™”. The “ALL SERVICE LINER™” is a synthetic hopper insert, that is installed into the hopper, which in turn restores the concrete hopper back to it’s original contour, to get the porcelain spheres back into there proper position. This will extend the life of the Wheeler underdrain system as well as the filter bed. All Service Contracting Corp. highly recommends that at the time of a media change out
the “ALL SERVICE LINER™” be installed, due to the fact that the next time the media is removed may be up to 20 years.
All Service Contracting Corp. will upon request, inspect the Wheeler underdrain system to determine the extent of the restoration of the concrete hoppers.
FILTER UNDERDRAIN SYSTEM REHABILITATION
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