Description
Vertical diatomaceous earth (D.E.) filter designed for pool and spa circulation systems. The ProGrid DE4820 uses replaceable grid elements and up-flow filtration to remove fine particles and improve water clarity. It is intended for new or aftermarket installations where high dirt-holding capacity and service access are required.
Quick Answer: What Is the Hayward DE4820?
The Hayward DE4820 is a d.e. pool filter: Hayward ProGrid 48 sq-ft 96 gpm In-Ground 6 lb DE Filter. It is brand new, ships in 1-2 business days, and is backed by the Hayward manufacturer warranty.
Hayward DE4820 Specifications
| Brand | Hayward |
|---|---|
| Equipment Type | D.E. Pool Filter |
| Model Number | DE4820 |
| Effective Filtration Area | 48 sq ft |
| Pool Type | In-Ground |
| Flow Rate | 96 gpm |
| Product Line | ProGrid |
Key Features
- 48 sq-ft grid area for high dirt-holding capacity
- Up-flow filtration with top-down backwash for efficient cleaning
- Glass-reinforced co-polymer tank resists corrosion
- High-impact grid elements for consistent particle removal
- 2-inch internal piping for reduced flow resistance
- Quick quarter-turn manual air relief valve for fast air bleed
- One-piece flange clamp and self-aligned tank for easy servicing
How It Works
The filter removes dirt and debris from the water the pump circulates. Cartridge filters trap particles in pleated fabric, sand filters use a bed of media that is cleaned by backwashing, and D.E. (diatomaceous earth) filters coat grids or fingers with D.E. powder for the finest filtration. The filter must be sized for the pump's flow rate and the pool's volume.
How to Choose the Right D.E. Pool Filter
- Size the filter to the pump flow rate (GPM) and pool volume; most pros oversize the filter for longer cleaning intervals.
- Match port size and valve style (top mount, side mount, multiport or push-pull).
- Compare filter area: square feet for cartridge and D.E. filters, square feet of bed area for sand filters.
- Consider maintenance preferences: cartridges are hosed off, sand and D.E. filters backwash.
- Check whether the tank, valve, media or cartridges are included.
If you are replacing an existing part, the fastest way to confirm compatibility is to match the brand and model number on the old equipment. Send us the model number or a photo of the label and our team will help confirm the DE4820 is the right fit before you order.
Installation and Safety
Install the filter on a level pad after the pump and before the heater and sanitizer. Use the correct pipe size, observe the maximum working pressure, and install the air relief and pressure gauge. Always release pressure before opening a filter tank; a tank or clamp that is opened under pressure can cause serious injury.
Maintenance Tips
- Note the clean starting pressure; clean or backwash when the gauge rises 8-10 psi above it.
- Hose off cartridges regularly and replace them when pleats are damaged or flattened.
- Replace sand every few years and recharge D.E. after every backwash.
- Inspect O-rings and the clamp band for wear.
What's Included
This listing is for the Hayward DE4820 as described in the specifications above. Plumbing, wiring, unions and accessories are not included unless they are listed in the product name or specifications.
Built for Homeowners, Pool Pros and Property Managers
- Homeowners: match your existing model number, then reach out if you want a second set of eyes on compatibility before you order.
- Pool service pros and builders: order quickly, track every shipment, and reorder common parts for your routes and builds.
- Property managers and commercial pools: standardize equipment across properties and plan replacements with help from our team.
White Paper
- Hayward DE4820 Owner's Manual (PDF)
- Hayward DE4820 Owner's Manual 2 (PDF)
- Hayward DE4820 Brochure (PDF)
- Hayward DE4820 Line Drawing (PDF)
Frequently Asked Questions About the Hayward DE4820
Which filter type is best?
D.E. filters the finest particles, cartridges offer good filtration without backwashing, and sand is simple and durable. The best choice depends on your pool, water restrictions and maintenance preferences.
How often should I clean my filter?
When pressure rises 8-10 psi over clean pressure, or as the manufacturer recommends.
Can I upsize my filter?
Yes, a larger filter usually improves clarity and extends cleaning intervals, as long as plumbing and space allow.
Is this the genuine Hayward part?
Yes. It is brand new Hayward equipment (model DE4820) covered by the manufacturer warranty. Warranty terms vary by product and application; see the manufacturer documentation or ask our team.
