I need an o ring for Pentair 100. What is the correct replacement o rung

If you are referring to the Pentair Clean & Clear 100 Cartridge Filter, then this O-Ring is the correct O-Ring for your Filter Tank. This O-Ring is 9 3/4" in diameter. It is designed to be stretched out and around the tank in order to create a tight seal along the filter tank lid. The best way to go about installing this O-Ring would be to first stretch the O-Ring onto the lid (or top half) of the filter tank until it is properly seated in the groove provided for the tank O-Ring, then place the lid onto the tank.

Seller, is this oem or not? if oem please update the listing.

Hello, I do not know if this is OEM, or not. What I can say, assuredly, is that it is a perfect fit for this Pentair, was easy to install with a little WD-40 to keep it soft, and it absolutely fixed the slow seepage caused by the other 6-year-old worn-out O-ring.

Will this fit a CCP320 system?

I don't know, but if you google ccp320, you will be able to access the parts list, there you will be able to get the correct part. Good luck.

Will this fit a pentair lid 178553

I do not know. I used it on pentair clean and clear cp320. Lid is p/n 178551. Not sure about 178553

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💧 Seal the deal with flawless filtration!

DURABLE DESIGN - Crafted to withstand poolside conditions and maintain integrity
LEAK PROOF SEAL - Prevents water loss and maintains optimal filtration efficiency
EASY REPLACEMENT - Simple swap to keep your pool system running smoothly without downtime
PRECISION DIMENSIONS - Exact 9-3/4" x 9-3/4" x 1/4" sizing for a flawless fit
PERFECT COMPATIBILITY - Fits multiple Pentair pool & spa filter systems seamlessly

The Pentair 87300400 Body O-Ring is a precision-engineered replacement seal designed for Pentair Clean & Clear, Warrior, EasyClean, and Predator pool and spa cartridge and D.E. filter systems. Measuring 9.75 x 9.75 x 0.25 inches, this durable black o-ring ensures a leak-proof fit, maintaining your pool’s filtration efficiency and extending system life.

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Manufacturer	Pentair
Part Number	87300400
Item Weight	1.28 ounces
Product Dimensions	9.75 x 9.75 x 0.25 inches
Item model number	87300400
Is Discontinued By Manufacturer	No
Color	black
Item Package Quantity	1
Usage	Above ground pool and spas
Included Components	Includes : 1 x Pentair 87300400 Body O-Ring Replacement
Batteries Included?	No
Batteries Required?	No

Pentair 87300400 Body O-Ring

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