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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Pentair 87300400 Body O-Ring

Product ID: 9107048

Details

Brand
Pentair
Color
black
Item Diameter
0.25 inches
Nominal Outside Diameter
9.75 inches
UPC
788379693350

💧Superior water-tight seal

♻️Durable, long-lasting material

🛠️Precision 9.75-inch fit

Description

💧 Seal the deal with Pentair’s precision O-ring – your pool’s silent guardian!

TRUSTED QUALITY - Pentair brand reliability with 4.5-star rating from 1,371 users
LIGHTWEIGHT DURABLE - Only 1.28 oz but built to withstand poolside conditions
PERFECT COMPATIBILITY - Seamlessly fits Pentair Clean & Clear, Warrior, EasyClean & Predator systems
PRECISION ENGINEERING - Exact 9-3/4 inch dimensions ensure leak-proof performance
EFFORTLESS MAINTENANCE - Quick replacement keeps your pool filter running like new

The Pentair 87300400 Body O-Ring is a high-precision replacement seal designed for multiple Pentair pool and spa filter systems. Measuring 9.75 inches in diameter and 0.25 inches thick, it ensures a secure, leak-proof fit to maintain optimal filtration performance. Lightweight yet durable, this trusted Pentair component is highly rated by thousands of pool owners for reliable, long-lasting use.

Specifications

ASIN	B004VU8T08
Best Sellers Rank	#121,674 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,131 in Pool & Spa Replacement Parts
Brand Name	Pentair
Color	black
Customer Reviews	4.5 4.5 out of 5 stars (1,370)
Global Trade Identification Number	00788379693350
Included Components	Includes : 1 x Pentair 87300400 Body O-Ring Replacement
Item Diameter	0.25 inches
Item Weight	1.28 ounces
Manufacturer	Pentair
Model	87300400Z
Nominal Outside Diameter	9.75 inches
Number of Items	1
Number of Packs	1
Number of Pieces	1
Part Number	87300400
UPC	788379693350
Unit Count	1 Count

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