Waterway Crystal Water 425 Sq. Ft. Cartridge Filter Lid with Labels | 550-4470B

The Waterway 550-4470B Crystal Water Filter Lid is a genuine OEM replacement upper tank housing designed for the Waterway Crystal Water 425 square foot cartridge filtration system. This replacement lid includes factory-applied Crystal Water cartridge filter labels and is designed to restore the upper housing of compatible swimming pool filters.

Manufactured from durable glass-fiber-reinforced polypropylene, the Waterway 550-4470B is designed for the operating conditions of a pressurized swimming pool filtration system. It is an ideal replacement for an original filter lid that has become cracked, damaged, or structurally compromised.

Product Features

• Genuine Waterway OEM: Original manufacturer replacement filter tank lid.
• 425 Sq. Ft. Filter Compatibility: Designed specifically for compatible Waterway Crystal Water 425 square foot cartridge filters.
• Factory-Applied Labels: Includes Crystal Water cartridge filter identification and safety labels.
• Heavy-Duty Construction: Glass-fiber-reinforced polypropylene provides strength and durability.
• Upper Filter Housing: Replaces the removable upper portion of the filter tank.
• Serviceable Design: Allows access to the filter cartridges when installed with the correct clamp and sealing components.
• Direct OEM Replacement: Manufactured to fit the specified Waterway Crystal Water filter assembly.

Product Specifications

• Manufacturer: Waterway Plastics
• Manufacturer Part Number: 550-4470B
• Product Type: Replacement Cartridge Filter Tank Lid
• Filter Series: Crystal Water
• Compatible Filter Size: 425 Sq. Ft.
• Material: Glass-Fiber-Reinforced Polypropylene
• Color: Black
• Labels: Factory-Applied Crystal Water Cartridge Filter Labels
• Distributor Part Number: WWP-051-0120
• Parts Diagram Reference: Item #2
• UPC: 806105607140
• Approximate Product Weight: 21 lb
• Approximate Shipping Dimensions: 23" x 21" x 28"
• Quantity: 1 Replacement Filter Lid

Compatible Waterway Filters

• Waterway Crystal Water 425 Sq. Ft. Cartridge Filter
• Waterway 570-0425-07 Crystal Water Cartridge Filter
• Compatible Waterway Crystal Water filter assemblies specifically requiring replacement lid 550-4470B

Compatibility: This lid is intended for the 425 square foot Crystal Water cartridge filter configuration. Waterway identifies separate lid part numbers for the 325 square foot and 525 square foot models. Verify the filter model and original part number before ordering.

When to Replace Your Filter Lid

The upper filter housing is an important structural component of the pressurized filter tank. Damage to this component can create a serious safety hazard and should be addressed immediately.

Replacement may be necessary when the existing lid shows:

• Visible cracks or structural damage
• Damage caused by freezing conditions
• Broken or deteriorated clamping surfaces
• Warping or deformation
• Damage around the air relief assembly connection
• Leaks caused by a damaged tank sealing surface

Safety Warning: Never operate a pool filter with a cracked or structurally damaged lid. A pressurized filter tank can separate suddenly and cause serious injury.

Related Waterway Crystal Water Replacement Parts

Complete your filter repair with these related Waterway components available from Aqua Pool Supply.

• Waterway 805-0000B – Crystal Water Main Tank O-Ring – Replacement sealing O-ring installed between the upper filter lid and lower tank body.
• Waterway 550-6730 – Filter Pressure Relief Valve Assembly – Replacement air relief assembly for compatible Waterway Crystal Water cartridge filter configurations.
• Waterway 550-4407 – Crystal Water Filter Tank Body with Labels – Replacement lower filter tank housing for compatible Crystal Water filtration systems. Verify the specific filter model before ordering.
• Waterway 400-9974B – Filter Union Fitting Package – Plumbing connection kit for compatible Waterway cartridge filter systems.

Complete Waterway Crystal Water 425 Sq. Ft. Filter

Need to replace the entire filtration system instead of the lid?

Waterway 570-0425-07 – Complete Crystal Water 425 Sq. Ft. Cartridge Filter is available separately for installations requiring a complete filter assembly.

Installation Information

1. Turn off the pool pump and disconnect electrical power.
2. Prevent automatic or scheduled pump operation during servicing.
3. Open the manual air relief valve and completely relieve internal filter pressure.
4. Verify that the pressure gauge reads zero before attempting to remove the existing filter lid.
5. Remove the filter clamp according to Waterway's service instructions.
6. Carefully lift off the existing lid and inspect the tank body and sealing surfaces.
7. Inspect the main tank O-ring and replace it if damaged or deteriorated.
8. Confirm that the replacement 550-4470B lid matches the original filter configuration.
9. Install the replacement lid using the correct O-ring, clamp assembly, and other specified components.
10. Reassemble the filter according to Waterway's instructions, including the required clamp tightening procedure.
11. Restart the filtration system following the manufacturer's air-purging procedure and inspect for leaks.

Filter Lid Maintenance

During routine filter cartridge cleaning, inspect the lid, clamp, tank O-ring, and air relief components for deterioration. Keeping these components in proper condition is essential for safe filter operation.

• Inspect the lid for cracks and deformation.
• Check the main tank O-ring for flattening or damage.
• Inspect the clamp assembly and fastening hardware.
• Keep the sealing surfaces clean and free of debris.
• Replace damaged pressure-relief components when necessary.
• Never attempt to repair structural tank cracks with adhesives or sealants.

Additional Waterway Filters and Parts

Explore our Waterway Cartridge Filters collection for complete filtration systems and related equipment.

Package Includes: One (1) genuine Waterway 550-4470B Crystal Water 425 Sq. Ft. Replacement Cartridge Filter Lid with Factory-Applied Labels.

Important: This listing is for the replacement upper filter tank lid with labels. The lower tank body, filter cartridges, tank O-ring, clamp assembly, air relief valve, pressure gauge, and other components are not included unless specifically indicated by the manufacturer.

Installation Safety: Pool filters operate under pressure. Never loosen a filter clamp, remove the lid, or service the filter while the system is pressurized. Follow all Waterway installation and maintenance instructions.