Single Handle Faucet Cartridge for Sigma Faucets 18.30.865

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Bright blue plastic cartridge with grey limit stop and bottom with bright brass handle connections bal-oring and seals.

Single Handle Faucet Cartridge for Sigma Faucets 18.30.865 - Image 3

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“Hey these guys are awesome! If you need a part for a fixture they have it send a picture and they can tell you what it is, they know their stuff, they have the weird obscure things you can't find unless you get a whole trim kit or whatever. Worth the trip and the money. They save you tons of time definitely visit ”

-Justin H.

06/05/2026

$78.47

The Sigma 18.30.865 is a pressure balance shower cartridge primarily designed for Sigma shower valves manufactured between 2008 and mid-2014.

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Restore the perfect temperature control and eliminate leaks in your shower system with the Sigma 18.30.865 Pressure Balance Cartridge. Engineered for regulating the blend of hot and cold water while protecting your household against sudden, dangerous temperature drops (scalding).

18.30.865