Unicel FG-1248 Replacement DE Filter Grid | Pentair Purex SM/SMBW 48 sq. ft.
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- SKU:
- FG-1248
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About This Item
The Unicel FG-1248 is a single, precision-engineered replacement full DE filter grid designed for Pentair Purex SM/SMBW series 48 sq. ft. DE filter systems. Built to exact OEM dimensional specifications, this grid delivers reliable debris capture and extended service life for filter systems with a total 48 square foot filtration capacity. Reinforced construction withstands the pressure demands of sealed DE filter tank environments.
⚠️ IMPORTANT: CHECK BEFORE YOU BUY
This product is a single (1) replacement DE filter grid — it is NOT a complete set. A full filter service requires multiple grids. Please verify the quantity and type (full or partial) needed for your specific filter model before ordering.
⚠️ IMPORTANT: Partial Grid Also Required for Full Filter Service
The Pentair Purex SM/SMBW 2048 and SM/SMBW 4048 filters require 7 full grids + 1 partial grid for a complete re-grid service. This listing is for the full grid only. You will also need companion partial grid FG-1249 to complete your filter service.
⚠️ IMPORTANT: Do Not Mix Premier and Purex Grids
Premier and Purex grids are NOT interchangeable. Substituting or mixing grid types from different manifold systems will result in improper fit and potential equipment damage. Always replace with the correct Purex-compatible grid for your filter model.
Specifications
| Unicel Part Number | FG-1248 |
| Filter System Area | 48 sq. ft. (total system capacity) |
| Grid Length | 25 3/8" (measured from collar notch to opposite end) |
| Collar Configuration | Single notch collar, covered with black adapter |
| Material | High-grade DE filter fabric with reinforced seaming |
| Quantity | 1 grid (single replacement) |
Note from Unicel: Collar has single notch and is covered with a black adapter. Length is measured from collar notch to opposite end of grid.
Fits Into:
| OEM Brand | Filter Model | OEM Part Number | Grid Configuration |
| Pentair - Purex | SM/SMBW 2048 | — | 7 full grids + 1 partial grid |
| Pentair - Purex | SM/SMBW 4048 | — | 7 full grids + 1 partial grid |
(This is not an exhaustive list.)
Pro Tips
- Safety first: Always turn off the pump and release all pressure from the filter tank via the air relief valve before opening the tank to replace grids.
- Measure before ordering: Verify your existing grid length using Unicel's measurement method — from the collar notch to the opposite end of the grid — to confirm FG-1248 is the correct fit.
- Inspect the collar and black adapter: Check for cracks or wear on the collar and adapter during replacement. Replace if damaged to maintain a proper seal.
- Don't forget the partial grid: A complete re-grid for the SM/SMBW 2048 and 4048 requires 7 of this full grid (FG-1248) plus 1 partial grid (FG-1249). Order both to complete the service in one visit.
- Inspect the tank o-ring: While the filter is open, inspect and lubricate the tank o-ring to prevent leaks after reassembly.
Also known as: FG1248
