MAINTENANCE
Black Diamond Cartridge Filter Lid With O-Ring
Airtight Seal
OEM Quality
UV Resistant
Easy Install
This heavy-duty replacement lid restores a perfect atmospheric seal to your Black Diamond filtration system. It includes a fresh O-ring to eliminate leaks and ensure your pump maintains maximum priming efficiency.
Why You'll Love It
- Restores Suction — Prevents air from entering the system so your pump stays fully primed.
- Stop Leaks — High-quality seated O-ring prevents water weeping around the filter head.
- Heavy-Duty Build — Reinforced polymer construction resists cracking under high pressure.
- Ready to Go — Includes the essential O-ring gasket so you don't have to buy parts separately.
Best For
- Black Diamond Series Filters
- Replacing cracked or warped lids
- Fixing recurring air bubbles in the pool
- Systems losing pressure due to old seals
Quick Tips
- Turn off the pump and release system pressure via the air relief valve before opening.
- Clean the filter tank threads thoroughly before spinning on the new lid.
- Apply a light coating of silicone-based lubricant to the O-ring for a better seal.
- Replace the lid immediately if you notice spider-web cracks (crazing) in the plastic.
Key Features
Reinforced Polymer
Nitrile Rubber O-Ring
Chemical Resistant
Precision Threading
Impact Resistant
Fit & Compatibility
FitsBlack Diamond Filters
Pool TypeAbove-Ground / In-Ground
MaterialGlass-Filled Thermoplastic
Use WithCartridge Filter Tanks
Care & Storage
- Rinse with fresh water after use.
- Let dry fully before storing.
- Store out of direct sun for longer life.
- Replace worn parts as needed.
PRO TIP
Never over-tighten the lid using tools; hand-tight is sufficient. Over-tightening can stretch the O-ring or crack the lid housing, leading to "suction side" air leaks that are difficult to diagnose.
Always follow label directions and safety guidance. Keep pool chemicals and accessories stored safely and out of reach of children.
