Cold Ceramic Cartridge for Altmans Phylrich & Sigma OLC4 CI 18.30.029

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Bright brass cartridge with black oring white ceramic discs and blue bottom washer.

WHAT OUR CUSTOMERS SAY…

“They had my part shipped the same day. I mistakenly checked that I would pick the part up at the store and they fixed it in minutes. ”

-Michael F.

01/04/2026

$39.27

The Altmans OLC4 CI (also known as part number 18.30.029) is a cold-side 1/2″ ceramic disc faucet cartridge used across several premium plumbing brands. It is primarily a 1/4-turn replacement part that opens in a clockwise direction.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, noelsplumbingsupply@fuse.net, or via the text widget on this screen.

SKU: 80093 Category: Two Handle Ceramic Cartridges Tags: Altmans, Paul, Phylrich, Sigma Faucet

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The Altmans, Phylrich, and Sigma Cold Ceramic Cartridge (Part 18.30.029 / OLC4 CI) is a high-precision replacement valve designed to restore leak-free performance to high-end bathroom and kitchen faucets.

OLC4 CI 18.30.029

It is used on a variety of Altmans branded faucets and is interchangeable with specific cartridges from Phylrich and Sigma, such as the Sigma 18.30.029 and Phylrich LC499CNL.
1/4-turn
2 5/8″ length
16 point broach

Common questions about this product

Yes, this aftermarket part will replace your OEM part.

If you’re not sure text us a picture 1-888-275-6635 or email us a picture at noelsplumbingsupply@fuse.net.

We will make sure you have the right part.

WHAT OUR CUSTOMERS SAY…

“Holy guacamole! They had a part moen had out of stock, shipped the next business day, and got to me the next day Ohio -> Tennesse. Super happy, double packed for safe shipment. I couldn't be happier unless they installed the part for me! ”

-Brian D.

06/08/2025