Larsen Supply S-166-2NL Ceramic Stem Cold 3804

Product Description

The Larsen Supply S-166-2NL is a no-lead compliant ceramic stem designed for cold-side faucet repair. Ceramic stems provide a durable, corrosion-resistant seating surface that outperforms traditional rubber or neoprene seat washers in long-term wear applications. This stem is packaged individually on a clamshell card and is suited for plumbers and service technicians performing faucet stem replacements in residential or light commercial settings. The no-lead designation confirms the part meets applicable lead-free standards for potable water systems, making it appropriate for use in jurisdictions that enforce lead-free plumbing product requirements.

This ceramic stem is intended for cold-side faucet applications and corresponds to the widely referenced 3804 stem specification, which spans a broad range of faucet brands and configurations. It is a practical stock item for plumbing service vans and supply counters given its broad fitment range. Typical installation scenarios include faucet rebuild or stem swap jobs on lavatory, kitchen, or utility faucets requiring a 3804-pattern cold stem.

Key Features

• No-lead compliant construction for use in potable water systems
• Ceramic stem design for long-lasting, low-wear performance
• Cold-side stem configuration matching the 3804 specification
• Carded clamshell packaging for retail and service-counter display
• Fits many manufacturers per 3804 stem pattern

Compatibility

Designed as an OEM-style replacement ceramic stem for cold-side faucet assemblies following the 3804 stem specification across multiple manufacturers.

Installation Notes

Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply to the affected fixture and relieve line pressure before disassembling the faucet. Remove the existing stem using the appropriate stem socket or deep-well socket, taking care not to damage the valve seat. Verify the replacement stem seats correctly and operates smoothly before restoring water supply and checking for leaks.