Hayward | W3DE3620 | 36 sq ft DE Pool Filter - High-Performance
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The Hayward W3DE3620 Pro-Grid 36 sq ft DE Filter uses diatomaceous earth to trap particles down to roughly 2 microns, which is finer than sand or cartridge filtration can reach. That is why DE filters are the choice for owners who want visibly sharper water clarity on small-to-medium in-ground pools.
Key Features
- 36 sq ft of filtration area, sized for small-to-medium residential pools
- DE filtration captures debris as small as 2 microns
- Reinforced, corrosion-proof filter tank
- 2" full-flow internal piping for better flow and lower energy use
- Manual air relief valve for quick, safe pressure release
- Heavy-duty tamper-proof one-piece flange clamp
- Quick DE recharge system for faster maintenance
- Suitable for in-ground pools of various surface types
Specifications
- Brand: Hayward
- Model / Part Number: W3DE3620
- UPC: 0610377387873
- Filter Type: Diatomaceous earth (DE)
- Filtration Area: 36 sq ft
- Particle Capture: Down to approximately 2 microns
- Internal Piping: 2" full-flow
- Closure: One-piece tamper-proof flange clamp
- Best For: Small-to-medium in-ground pools
Frequently Asked Questions
Why choose DE over sand or cartridge?
DE filters the finest particles of the three, roughly 2 microns compared with about 20 to 40 for sand and 10 to 20 for cartridge. The trade-off is more hands-on maintenance, since you recharge the grids with DE powder after each backwash.
How much DE powder does this filter need?
DE quantity scales with filter area. Follow the charge listed in the Hayward owner's manual for the 36 sq ft model, and always add DE slowly through the skimmer with the pump running.
What size pool does 36 sq ft handle?
It suits small-to-medium in-ground pools. If your pool is larger, or if you run heavy bather loads, step up to a larger Pro-Grid model rather than shortening the interval between backwashes.
How often do I backwash a DE filter?
Backwash when pressure climbs roughly 8 to 10 PSI above your clean baseline, then recharge with fresh DE. Note your clean pressure right after a recharge so you have something to measure against.
Can I run a DE filter on a saltwater pool?
Yes. The tank is corrosion-proof and salt chlorination does not affect DE media. Standard water chemistry maintenance still applies.
What is the quick DE recharge system?
It is a design detail that shortens the recharge step after backwashing, so you spend less time getting the filter back to full performance.
Do the grids need replacing over time?
Yes. Grid fabric wears and eventually tears, usually after several seasons. Torn grids show up as DE powder blowing back into the pool through the returns, and that is the signal to inspect and replace them.
Does the filter include DE powder or a multiport valve?
Neither is included. DE powder is a consumable purchased separately, and the valve is a separate item on this model.