Product Overview

The Waterway 550-4470B is a genuine replacement lid (upper tank section) for the Waterway Crystal Water 425 sq. ft. cartridge pool filter, supplied with Crystal Water identification labels. It replaces a cracked, warped or weathered lid without replacing the rest of a serviceable filter, so the lower tank and other components can stay in use.

⚠️ Important Purchase Notice

The filter lid is a pressure-containing component. Have a qualified pool professional inspect the tank, clamp, sealing surfaces, O-ring and air-relief components, and follow Waterway's instructions for assembly and startup. Never operate a filter with damaged pressure-containing parts. This item ships at about 21 lb. Inspect the shipment upon arrival and report damage promptly.

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Ideal For

• Replacing a cracked or damaged lid on a Waterway Crystal Water 425 sq. ft. cartridge filter.
• Repairing a filter whose lower tank and internals are still serviceable.
• Pool owners and service technicians maintaining Crystal Water filters.

Key Features

• Genuine Waterway part, number 550-4470B.
• Made for the Crystal Water 425 sq. ft. cartridge filter.
• Replaces the upper tank section only.
• Includes Crystal Water cartridge filter labels.

Benefits

• Restores a sound, sealed filter housing.
• Lower-cost repair than replacing the whole filter.
• Labels keep the filter easy to identify for future service.

Compatibility

For the Waterway Crystal Water 425 sq. ft. cartridge filter. Waterway uses different lids for its 325 and 525 sq. ft. cartridge filters, Crystal Water D.E. filters and other filter families. Confirm your filter's identification label and parts list before ordering.

Installation or Upgrade Context

Turn off the pump, prevent automatic startup and fully release pressure through the air relief. Remove the clamp and old lid, inspect the O-ring and sealing surfaces, then set the new lid in place and reinstall the clamp per Waterway's instructions. Open the air relief, start the pump, bleed the air and check for leaks.

What’s Included

• One Waterway 425 sq. ft. cartridge filter lid
• Crystal Water cartridge filter labels

Cartridges, lower tank, clamp, main body O-ring, pressure gauge and air-relief parts are sold separately.

Specifications

Warranty

Covered by a 1-year manufacturer warranty, subject to Waterway’s applicable terms. Contact Waterway for warranty claim instructions; Pool Supply Depot can provide proof of purchase.

Customer Q&A

Will this fit my 325 or 525 sq. ft. filter?

No. It is made for the 425 sq. ft. Crystal Water cartridge filter only; other sizes use different lids.

Does it come with the clamp or O-ring?

No. Reuse your clamp if it's in good condition, and replace the main O-ring if it's worn.

Are labels included?

Yes. Crystal Water cartridge filter labels are included.