Hayward DEX4820BTC Filter Head | W/ Clamp System
Hayward DEX4820BTC Filter Head | W/ Clamp System
Keep your pool filter at peak efficiency with the genuine Hayward DEX4820BTC Filter Head. Shasta Pool Supply offers the best prices and fast shipping. Specifically, DEX4820BTC Filter Head provides the clamp system providing tight, secure seal under pressure, and helping prevent leaks.
Hayward DEX4820BTC Filter Head
Hayward offers genuine OEM replacement parts providing durable materials and the perfect. Furthermore, Hayward DEX4820BTC replaces select Pro-Grid DE, and SwimClear cartridge filter models. Additionally, DEX4820BTC provides durable chemical-resistant materials to withstand chlorine, salt, and UV.

Collapsible content
Key Features
- Includes: Heavy-duty clamp ring assembly with the aluminum clamp ring, and the metal-reinforced O-ring seal—all engineered for the harsh pool environment.
- Leak-free performance: The clamp system ensures a tight, secure seal under pressure—helping prevent leaks and maintain peak filtration efficiency.
- Durable materials built for pool use: Designed with chemical-resistant materials to withstand a full season (and beyond) of chlorine, salt, and UV.
Technical Specifications
- Compatible With:
- Pro-Grid DE filters: DE2420, DE3620, DE4820, DE6020, DE7220
- SwimClear multi-element cartridge filters: C4020, C4025, C4030
Specs
- Part Number: DEX4820BTC
- Manufacturer: Hayward
- Length: 24.3
- Width: 22.4
- Height: 16.5
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What our customers are saying
Ordering and payment was simple and easy to do. Dan is wonderful.
Ordering and payment was simple and easy to do. Dan is wonderful.
DeeDee B
Fast pickup. The guy who helped me had a great attitude!
Fast pickup. The guy who helped me had a great attitude!
John R
Quick delivery for the part I needed
Quick delivery for the part I needed
Mel C
FAQ
Our expert staff answers customer's most asked questions.
What are the benefits of a DE Filter?
There is a huge benefit to using a DE (Diatomaceous Earth) filter, DE filters have superior filtration, and can trap particles as small as 2-5 microns. This results in exceptionally clear and clean water. This high level of performance is ideal for removing fine debris like pollen and algae. Additionally, this can potentially lead to reduced chemical usage because more contaminants are removed from the water.
How frequently should I clean my filter cartridges?
The cleaning frequency is contingent on your filter's size. As a general guideline, initiate the cleaning process when the filter pressure exceeds the initial pressure by 10 psi. This ensures optimal filtration efficiency.
Why am I being charged shipping for a return?
For detailed information regarding shipping charges for returns, please review our shipping policy.
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