Description
Waterway Cartridge Manifold Plug for Inground Crystal Water Filter | 519-4320
OEM Waterway cartridge manifold plug for Crystal Water inground cartridge filters. Direct replacement part for proper internal filter assembly fit.
Features
- Genuine Waterway replacement part.
- Designed for Crystal Water cartridge filter assemblies.
- OEM part number 519-4320 for accurate replacement matching.
- Helps restore proper internal manifold assembly in compatible filters.
- Made for inground cartridge filter service and repair.
The Waterway 519-4320 cartridge manifold plug is a direct OEM replacement part used in Waterway Crystal Water inground cartridge filter systems. This is a model-specific internal filter component, not a universal substitute. When the original plug is worn, damaged, or missing, replacing it with the proper Waterway part helps keep the cartridge manifold assembly correct and the filter rebuild cleaner.
Pro Tip
When servicing the filter, inspect the pressure relief assembly and lid O-ring at the same time. Replacing worn companion parts during one teardown saves repeat labor later.
Related Parts
- Waterway Pressure Relief Valve Assembly | 550-6730
- Waterway O-Ring, Oval, EP55, 18.7 ID | 805-0000B
- Waterway Crystal Water Cartridge Filter 325 Sq. Ft. | 570-0325-07
Installation Tips
Confirm exact Waterway Crystal Water filter compatibility before ordering. Inspect adjacent manifold and sealing components for cracks or wear, and only reassemble the filter with matching OEM-style parts.









