Reinforced for Point Loads
Blue Thumb recommends the aluminum grate for fountain arrangements that place substantial weight in concentrated areas, such as triple vase or triple basalt displays.
Altum AquaBox® Aluminum Grate Upgrade
$1,099.99
- Reinforced aluminum construction: Designed for fountain layouts with heavy, concentrated point loads.
- Altum-specific fit: Made for the 52.5-inch square Altum AquaBox® fountain basin.
- Two-piece configuration: Sized to replace the Altum’s standard grate surface.
- Service access maintained: Includes a pump-access opening and cover.
- Ideal applications: Recommended for triple vase sets, triple basalt columns and other demanding fountain layouts.
- Upgrade only: Altum basin, fountain pieces, pump, plumbing and finishing materials are sold separately.
Reinforced support for demanding fountain layouts
Altum AquaBox® Aluminum Grate Upgrade
Replace the standard grate surface on a 52.5-inch square Altum AquaBox® with a two-piece aluminum grate made for layouts with concentrated heavy point loads, including triple vase sets and triple basalt columns. A dedicated pump-access cover keeps the service opening usable after installation.
SKU: ABDGRATE
Fits: 52.5-inch square Altum AquaBox®
Configuration: Two-piece aluminum grate
Service access: Pump-access cover included
Why Choose the Aluminum Upgrade?
The ABDGRATE is a project-specific structural upgrade for the Altum reservoir—not a decorative add-on and not a complete basin.
Built for the Altum
The two grate sections are sized for the 52.5-inch square Altum AquaBox® and work with its concealed-reservoir format.
Service Access Preserved
The included pump-access cover lets you plan a reachable service point for the pump and plumbing beneath the finished surface.
What Comes with This Upgrade?
This listing is for the aluminum grate set only. It is intended for customers who already have—or are separately purchasing—the compatible Altum AquaBox® basin.
Included
- Two-piece aluminum grate set for the Altum AquaBox®
- One grate section with pump-access opening
- Pump-access cover
Not Included
- Altum AquaBox® basin or center support
- Fountain pieces, pump, tubing or plumbing
- Sediment screen, auto-fill equipment or regulator
- Decorative pebbles, site materials, landscaping or labor
Product Specifications
Use these dimensions for preliminary planning, then confirm the complete fountain and support layout before installation.
Item / SKU: ABDGRATE
Product type: Aluminum grate upgrade
Compatible basin: 52.5-inch square Altum AquaBox®
Grate material: Aluminum
Pump-access half: Approximately 24 × 47.75 inches
Second half: 22.75 × 47.75 inches
Configuration: Two grate sections
Included access part: Pump-access cover
Recommended use: Heavy point-load fountain arrangements
Published grate load rating: Not specified by Blue Thumb
Compatibility & Project Fit
This upgrade is designed specifically for the 52-inch Altum AquaBox® Fountain Reservoir Basin (item AB52AB). The basin measures 52.5 inches square, while the grate sits in the basin's approximately 48 × 48-inch inner seat.
Do not select the grate by overall size alone. Fountain weight distribution, the position of each contact point, the center support, molded basin supports and clear pump access all affect the finished layout.
Installation Planning
Treat the grate as part of the complete basin support system. Follow the Altum guide and confirm any grate modification directly with Blue Thumb.
Plan the Layout
Map every fountain contact point, tubing route and the pump-access location before placing the grate.
Verify the Supports
Confirm the basin is level and align the molded supports, center support and grate seam as shown in the Altum guide.
Dry-Fit & Test
Check the plumbing path, stability and pump access before setting heavy fountain pieces or adding decorative stone.
Modification note: The published basin guide discusses drilling the standard supplied grate. It does not provide product-specific cutting or drilling instructions for ABDGRATE. Confirm the approved method and location with Blue Thumb before altering the aluminum grate.
Product Resources
Review the compatible basin dimensions and installation sequence before finalizing the grate, fountain and plumbing layout.
Questions About Weight Distribution or Compatibility?
Blue Thumb's Sales and Technical Team can review the fountain footprint, total weight, contact points, support placement and service-access plan before you order.
Frequently Asked Questions
Key details to confirm before adding this upgrade to an Altum fountain project.
Is the Altum AquaBox® basin included?
No. This listing is for the two-piece aluminum grate upgrade and pump-access cover. The Altum AquaBox® basin, fountain, pump, plumbing, support components and finishing materials are separate unless included in another explicitly listed kit.
Which basin does this grate fit?
It is designed for the 52.5-inch square Altum AquaBox® fountain reservoir, item AB52AB. Blue Thumb does not list it as an upgrade for the round Achelous AquaBox® basins.
When should I use it, and how much weight can it support?
Blue Thumb recommends it for heavy concentrated loads, including triple vase sets and triple basalt columns. It does not publish a separate maximum-load rating for ABDGRATE, so have Blue Thumb review the complete basin, support and fountain layout.
Does the grate include pump access?
Yes. One grate section has a pump-access opening, and a pump-access cover is included. Plan the layout so that cover remains reachable after the fountain and decorative material are installed.
Can I drill or cut the aluminum grate for plumbing?
The published Altum basin guide discusses drilling the standard supplied grate, not the ABDGRATE aluminum upgrade. Confirm approved hole locations and methods with Blue Thumb before cutting or drilling this product.
Are extra support columns required?
Not for every installation. Additional 17-inch Altum support columns are sold separately and may be useful for some demanding layouts. Support quantity and placement should be based on the exact fountain footprint and point-load locations.
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