Hayward Top Closure Plate for SwimClear C3020/C4020 | CX3020DA

The Hayward CX3020DA Top Closure Plate supports the upper structure of the SwimClear C3020 and C4020 filter systems by holding the cartridge set firmly in place within the tank. Its molded design mirrors the original genuine Hayward layout, giving the plate the strength and accuracy needed to keep cartridges aligned during high-pressure operation. The closure plate helps maintain smooth water distribution across the filter pack, preventing uneven flow or bypass caused by worn or damaged components. Installing a new plate during a service rebuild helps extend filter performance and keeps the internal assembly functioning as intended.

Highlights

• Compatible with C3020/C4020 Models: Sized specifically for the SwimClear multi-cartridge platform to ensure proper seating over the manifold and cartridges.

• Durable Molded Construction: Built to withstand repeated pressure cycles, cleaning, and chemical exposure without losing shape.

• Original-Spec Design: Uses the same structural geometry found in original Hayward components, supporting reliable operation under normal and heavy load.

• Improves Internal Stability: Helps control cartridge positioning, ensuring each filter element receives consistent flow for better clarity.

• Easy Maintenance Upgrade: A practical replacement during routine service, restoring the internal support required for efficient filtration.

Compatibility

• Hayward SwimClear Multi-Cartridge C3020 Filter
  
• Hayward SwimClear Multi-Cartridge C4020 Filter

Additional Info

For online buyers restoring a SwimClear cartridge filter, the Hayward CX3020DA Top Closure Plate ensures proper alignment of the cartridge stack and maintains a tight seal at the tank top. This section helps confirm compatibility before ordering and explains what to check during installation once the part arrives.

Checking Compatibility Before Ordering Online

This OEM closure plate fits the C3020, C3025, C4020 and C4025 SwimClear filter models. Its molded shape ensures that cartridges seat correctly and the tank lid closes without gaps.

How to confirm online that my SwimClear model uses the CX3020DA plate

Whether this plate fits both older and current-generation SwimClear housings

Can I bundle this part with cartridges or O-rings for free shipping

What measurements to verify before completing my online order

Whether this plate replaces discontinued versions found on earlier tanks

Installing the Plate After Delivery

The plate must be placed directly on top of the cartridge bundle with the molded channels aligned to the manifold tabs. Ensuring a clean sealing surface prevents bypass and supports stable pressure readings.

How to seat the CX3020DA so the cartridges don’t shift at startup

What to check if the filter lid won’t close evenly after installation

Whether I need a new clamp band or O-ring if the top still leaks

How to inspect the manifold and cartridges before fitting the plate

Whether replacement clamps or lids are available online if needed

Keeping Your Filter Operating at Peak Efficiency

A secure top closure plate prevents air leaks, bypass and internal misalignment that can affect filtration quality. Replacing worn components ensures long-term clarity and stable system pressure.

How often to reorder SwimClear closure plates for annual maintenance

Whether this item qualifies for fast or free shipping with other Hayward parts

How to identify early cracking or warping through pressure fluctuations

What sounds or pressure spikes indicate a misaligned top plate

Are online rebuild bundles available for C3020 and C4020 series filters