Unicel FG-3009 Replacement DE Filter Grid for Sta-Rite System 3 S7D75 – 18" x 9-11/16"
- In stock, ready to ship
- Backordered: contact us for ETA
- SKU:
- FG-3009
-
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About This Item
The Unicel FG-3009 is a single replacement DE filter grid engineered for the Sta-Rite System 3 Model S7D75 — a 75 square foot diatomaceous earth filter system. Built to Unicel's precision manufacturing standards, this grid delivers reliable filtration performance and is designed to seat correctly within the S7D75's unique modular housing for a secure, leak-free fit.
⚠️ 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: Sta-Rite System 3 S7D75 — Unique Grid Configuration
Unlike standard DE filters that use 7 full grids plus 1 partial grid, the Sta-Rite System 3 S7D75 uses only 2 identical full-size grids — no partial grid is required. A complete filter re-grid for this model requires 2 × FG-3009. This listing is for one (1) grid.
Specifications
| Filter System Area | 75 sq. ft. (total system) — 37.5 sq. ft. per grid |
| Grid Length | 18" |
| Grid Width | 9-11/16" |
| Port Configuration | Port centered on the edge of the grid |
| Grids Per System | 2 (identical full grids — no partial grid) |
| Material | High-grade DE filter fabric with reinforced seaming |
Note from Unicel: Port is centered on the edge of the grid.
Fits Into:
| OEM Brand | Filter Model | OEM Part Number | Grid Configuration |
| Sta-Rite | System 3 Model S7D75 | 23900-1173 | 2 per system (no 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.
- Verify Your Model: Confirm your filter is the S7D75 before ordering — other Sta-Rite System 3 models (e.g., S8D110) use a different grid configuration.
- Buy Both at Once: Since the S7D75 requires 2 identical grids, it's best practice to replace both simultaneously for balanced filtration performance.
- Inspect Seals: When replacing grids, inspect tank o-rings and manifold seals for wear. Replace if cracked or deformed before reassembly.
- Dimension Match: Verify your existing grid measures 18" × 9-11/16" before ordering. Do not mix grids of different dimensions within the same filter system.
Also known as: FG3009
