Hayward ProGrid™ 48 Sq Ft Vertical Grid D.E. Filter
The Hayward ProGrid™ 48 Sq Ft Vertical Grid D.E. Filter provides superior water clarity, efficient flow, and large cleaning capacity for pools and spas of all types and sizes. ProGrid combines high-tech filtration features with a service-ease design for unparalleled D.E. filtration performance.
Built with a durable thermoplastic tank rated to 50 PSI, one-piece tamper-proof flange clamp for quick internal access, rapid-release manual air relief, inlet diffuser elbow for even distribution across all filter elements, and full-size 1.5-inch integral drain. Compatible with pumps up to 3 HP. Backed by a 2-year warranty.
Key Features
48 Sq Ft D.E. Filtration
Finest filtration available — vertical grid D.E. filters down to 3–5 microns for water clarity unmatched by sand or cartridge.
Service-Ease Design
Designed for fast, simplified service — one-piece flange clamp, manual air relief, and 1.5-inch drain make maintenance straightforward.
Inlet Diffuser Elbow
Distributes incoming water evenly over all filter elements for optimal D.E. loading and uniform filtration across the full grid area.
High-Capacity Rapid-Release Air Relief
Manual air relief valve bleeds air with a quick quarter-turn of the lever.
One-Piece Tamper-Proof Flange Clamp
Heavy-duty clamp securely fastens tank top and bottom — quick access to all internal components for service.
Full-Size 1.5" Integral Drain
Fast and complete flushing during backwash or winter drain-down.
Bulkhead Fittings with Union Locknuts
Simple, durable plumbing connections for secure installation.
Up to 3 HP Compatible
Handles pumps up to 3 HP at 50 PSI maximum working pressure.
2-Year Warranty
Hayward residential warranty coverage.
Who It's For
- In-ground pool and spa owners who want the finest filtration and the clearest water possible
- Pools in high-debris or algae-prone environments where D.E.'s micron-level filtration excels
- Anyone upgrading from sand filtration who wants dramatically clearer water
- Hayward system users wanting brand-matched D.E. filtration
Specifications
Performance
| Filtration Area | 48 sq ft |
| Filter Type | Vertical Grid D.E. |
| Max Working Pressure | 50 PSI |
| Max Pump Size | 3 HP |
Tank & Plumbing
| Tank Material | Thermoplastic |
| Filter Control Valve | Injection-Molded Polymer |
| Drain Size | 1.5 in (Full-Size Integral) |
| Side Clearance Required | 18 in |
| Vertical Clearance Required | 18 in |
Physical
| Product Weight | 75 lb |
| Shipping Dimensions | 23.1 × 24.6 × 41.8 in |
Approvals & Warranty
| Application | In-Ground Pool / Spa |
| Warranty | 2 Years |
What's in the Box
- Hayward ProGrid DE4820 Filter Tank with Vertical Grid Assembly
- One-Piece Flange Clamp
- User Manual
Note: Diatomaceous earth (D.E. powder) is not included and must be purchased separately.
Warranty
The Hayward ProGrid 48 sq ft D.E. Filter comes with a 2-year manufacturer warranty. Clearflow Pool Supply is an authorized Hayward dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
How does D.E. filtration compare to sand and cartridge?
D.E. filters provide the finest filtration of the three common types — capable of filtering particles down to 3–5 microns vs. 20–40 microns for sand and 10–15 microns for cartridge. This produces noticeably clearer water. D.E. filters require periodic backwashing to clean the grids and annual teardown with fresh D.E. powder.
How much D.E. powder does this filter require?
The ProGrid DE4820 (48 sq ft) typically requires approximately 7.2 lb of D.E. powder after backwashing or reassembly. Always follow the specific charge amount in the owner's manual and use pool-grade diatomaceous earth.
How does the ProGrid compare to the Pentair FNS Plus 48 sq ft?
Both are 48 sq ft vertical grid D.E. filters with service-ease designs. The Hayward ProGrid features an inlet diffuser elbow for even water distribution, union locknuts, and supports up to 3 HP. The Pentair FNS Plus features curved grids and a Service-Ease grid pack for simplified teardown. Both carry 2-year warranties. Brand preference and existing equipment compatibility are often the deciding factor.