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The LARSEN SUPPLY COMPANY LARS-181-2 is a cold-side ceramic cartridge designed for 3/4-inch valve bodies. Ceramic cartridges use a pair of precision-ground ceramic discs to control water flow, offering reliable shutoff and smooth operation over extended service life. This cartridge is rated for the cold water position and is intended for replacement service in compatible faucet and valve assemblies. Plumbers and service technicians install this type of cartridge when the original shows wear, leaks past the seat, or becomes stiff to operate.
This cartridge is suited for residential and light commercial plumbing applications where a 3/4-inch ceramic disc cartridge is required on the cold side of a two-handle or single-function valve. It is a direct-replacement component installed during routine faucet repair or valve rebuild service. The 4004 designation referenced in supplier data indicates the original cartridge series this unit corresponds to.
Designed as an OEM-style replacement ceramic cartridge for 3/4-inch cold-side valve assemblies corresponding to the 4004 cartridge series. Verify cartridge orientation, stem length, and port configuration against the existing valve before installation.
Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply and relieve line pressure before removing the existing cartridge. Use a cartridge puller tool where needed to avoid damaging the valve body. Confirm cold-side orientation before seating the new cartridge, as reversing hot and cold positions will result in incorrect operation.
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