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228 Buna-N O-Ring, 70A Durometer, Black, 2-1/4" ID, 2-1/2" OD, 1/8" Width (Pack of 100): O Ring Seals: Amazon.com: Industrial & Scientific
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With ED Seal Ring 1/8" 1/4" 3/8" 1/2" 3/4" 1" 1 1/2" BSPP Male M8 M30 Metric SS304 Countersunk Plug Solid With Flange Hex Socket|Pipe Fittings| - AliExpress
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Pentair O-ring 237 for 1/4", 3/8", & 1/2" Inlet Slim Line & Standard Housings (151121) - ESPWaterProducts.com
![Hillman 6-Pack 2-1/8-in x 3/16-in Rubber Faucet O-Ring in the Faucet O-Rings department at Lowes.com Hillman 6-Pack 2-1/8-in x 3/16-in Rubber Faucet O-Ring in the Faucet O-Rings department at Lowes.com](https://mobileimages.lowes.com/productimages/f91571df-8882-4bbf-bd9c-7d7ad10ed718/02377366.jpg?size=pdhism)
Hillman 6-Pack 2-1/8-in x 3/16-in Rubber Faucet O-Ring in the Faucet O-Rings department at Lowes.com
![Parker - 1-1/16-12 Male 3/4 Female Male Straight Thread O-Ring x Female NPTF 1-3/8" Hex Industrial Pipe Adapter - 09107988 - MSC Industrial Supply Parker - 1-1/16-12 Male 3/4 Female Male Straight Thread O-Ring x Female NPTF 1-3/8" Hex Industrial Pipe Adapter - 09107988 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0910798-24.jpg)
Parker - 1-1/16-12 Male 3/4 Female Male Straight Thread O-Ring x Female NPTF 1-3/8" Hex Industrial Pipe Adapter - 09107988 - MSC Industrial Supply
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