Pentair 154641Z 6" Black Buttress Thread Closure Kit for Triton II Sand Filters

The Pentair 154641Z Closure Kit is a genuine replacement 6" black buttress thread closure assembly used on compatible Pentair and PacFab Triton II sand filters. This closure kit replaces the top tank closure on filters using the 6" buttress thread design.

This kit is commonly used when the existing closure assembly is cracked, damaged, leaking, difficult to remove, or no longer sealing properly. A properly installed closure kit helps maintain filter pressure, prevent leaks, and keep the sand filter operating safely and efficiently.

Product Features

• Genuine Pentair replacement filter part
• Manufacturer part number: 154641Z
• 6" black buttress thread closure kit
• Designed for compatible Pentair and PacFab Triton II sand filters
• Used to replace a worn, cracked, leaking, or damaged top closure assembly
• Helps maintain a proper seal at the filter tank opening
• Ideal for filter repair, service, and restoration

Product Details

Compatibility

• Pentair Triton II sand filters with 6" buttress thread closure
• PacFab Triton II sand filters with 6" buttress thread closure
• Select Triton II TR100 and TR140 applications requiring the 6" black buttress closure kit
• Compatible filter tanks requiring Pentair part number 154641Z

Important Compatibility Notes

• Verify your filter model and tank closure size before ordering.
• This is the 6" buttress thread closure kit and will not fit filters requiring the 8-1/2" closure kit.
• Triton II filters were produced with different closure styles, including buttress thread and V-thread versions. Match your existing closure style before purchase.
• If the filter tank threads or tank opening are cracked or damaged, replacing the closure kit alone may not correct the issue.
• This item is not a complete filter tank, multiport valve, bulkhead fitting, or internal filter assembly.

Common Uses

• Replacing a cracked or leaking filter closure
• Repairing leaks at the top of a Triton II sand filter
• Replacing a worn or damaged dome closure assembly
• Servicing older Pentair or PacFab Triton II sand filters
• Restoring proper sealing at the filter tank opening

Installation Notes

• Turn off the pool pump before servicing the filter.
• Relieve all pressure from the filter before removing the closure assembly.
• Drain the filter as needed before opening the tank.
• Inspect the tank threads, sealing surface, O-ring, pressure gauge, and air relief components during service.
• Clean the closure threads and sealing surface before installing the replacement kit.
• Use only pool-safe silicone lubricant on O-rings when needed.
• Do not overtighten the closure, as excessive force can damage the closure or filter tank threads.
• After installation, restart the system and check carefully for leaks.

Maintenance Tips

• Inspect the closure assembly during routine filter service.
• Keep the closure threads clean and free of sand, dirt, and debris.
• Replace worn O-rings if the filter begins leaking around the closure.
• Monitor filter pressure and backwash or service the filter when needed.
• Maintain proper pool water chemistry to help reduce scale buildup on filter components.
• Repair filter leaks promptly to help prevent additional equipment damage.