Pentair Union Nut C Clip | Clean & Clear / Predator Cartridge Filter | 39104500Z

Pentair Union Nut C Clip | Clean & Clear / Predator Cartridge Filter | 39104500Z

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39104500Z
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About This Item

The Pentair Union Nut "C" Clip (39104500Z) is the OEM replacement retaining clip for the union nut assembly on Pentair Clean & Clear and Predator cartridge filters.

This small but critical clip locks the union nut in position on the filter's plumbing connection, preventing the nut from backing off under system pressure. When the original clip is lost, damaged, or deformed, the union nut loses its positive retention — allowing it to work loose and create a leak point at the filter connection. Replacing this clip restores the union nut's secure, locked position.

Specifications

Pentair Part Number 39104500Z
Part Type Union Nut "C" Clip
Quantity Included Each (1)

Fits Into

Brand Equipment Line Model / Part Number Notes
Pentair Clean & Clear Cartridge Filter — Clean & Clear / Predator Series CLEAN & CLEAR 50 Fits all Clean & Clear and Predator cartridge filters
Pentair Clean & Clear Cartridge Filter — Clean & Clear / Predator Series CLEAN & CLEAR 75 Fits all Clean & Clear and Predator cartridge filters
Pentair Clean & Clear Cartridge Filter — Clean & Clear / Predator Series CLEAN & CLEAR 100 Fits all Clean & Clear and Predator cartridge filters
Pentair Clean & Clear Cartridge Filter — Clean & Clear / Predator Series CLEAN & CLEAR 150 Fits all Clean & Clear and Predator cartridge filters
Pentair Clean & Clear Cartridge Filter — Clean & Clear / Predator Series CLEAN & CLEAR 200 Fits all Clean & Clear and Predator cartridge filters
Pentair Clean & Clear Filter Systems — Clean & Clear Series CLEAN & CLEAR Fits all Clean & Clear and Predator filters
Pentair Predator Cartridge Filter — Clean & Clear / Predator Series PREDATOR 50 Fits all Clean & Clear and Predator cartridge filters
Pentair Predator Cartridge Filter — Clean & Clear / Predator Series PREDATOR 75 Fits all Clean & Clear and Predator cartridge filters
Pentair Predator Cartridge Filter — Clean & Clear / Predator Series PREDATOR 100 Fits all Clean & Clear and Predator cartridge filters
Pentair Predator Cartridge Filter — Clean & Clear / Predator Series PREDATOR 150 Fits all Clean & Clear and Predator cartridge filters
Pentair Predator Cartridge Filter — Clean & Clear / Predator Series PREDATOR 200 Fits all Clean & Clear and Predator cartridge filters
Pentair Predator Filter — Clean & Clear / Predator Series PREDATOR Fits all Clean & Clear and Predator filters

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Pro Tip

This clip is often lost during routine filter servicing when the union nut is removed for plumbing disconnection. If you're opening the filter for cartridge cleaning or replacement, inspect the clip while the union is apart — a deformed or cracked clip is much easier to spot off the equipment than after reassembly. The part number 39104500Z is the same clip across all Clean & Clear and Predator filter sizes, so one spare on hand covers your entire system.

CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals which are 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.
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Pentair Pool Products and Parts

About Pentair Pool Products and Parts

Pentair is often considered the "gold standard" for pool professionals, and for good reason. Founded in 1966 (originally by five inventors making high-altitude balloons!), the company has evolved into the global leader in smart, sustainable water solutions. For the DIY homeowner, Pentair represents the intersection of rugged durability and silicon valley-tier technology. They pioneered the Variable Speed Pump revolution with the IntelliFlo®, saving American pool owners millions in energy costs. Today, their ecosystem focuses heavily on automation, allowing you to control your pump, heater, lights, and chemistry from a single app. While they are a favorite among professional builders, their "EC" (E-Commerce) line of equipment allows homeowners to access pro-grade technology with valid warranties for DIY installation.

Why We Trust Pentair Pool Products and Parts
Energy Efficiency Leaders: Recipient of the ENERGY STAR® Partner of the Year award for over a decade; their pumps are designed to pay for themselves in energy savings.

Smart Automation: The Pentair Home App and IntelliCenter systems offer best-in-class control over your pool ecosystem from anywhere in the world.

Professional Pedigree: The brand most often recommended and installed by pool builders for high-end residential pools.

Eco-Conscious: Dedicated to reducing water waste and energy consumption through "Green" technology innovations.

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