Union Brass 80080 Stem Bonnet Left Hand Washerless

Product Description

The UNION BRASS 80080 is a left-hand stem bonnet designed for washerless faucet assemblies. The stem bonnet serves as the upper sealing and valve-stem housing component in a compression or cartridge-style faucet body. It threads into the faucet body to secure the stem, maintain proper alignment, and create a watertight seal during operation. This part is typically installed by licensed plumbers or experienced service technicians performing faucet repair or rebuild work on residential or light commercial fixtures.

This stem bonnet is intended for use in washerless faucet configurations where the left-hand (cold-side) stem requires replacement or service. It is suited for repair applications where the original bonnet has worn threads, corrosion damage, or seal failure. The left-hand designation indicates directionality and must be matched correctly to the corresponding side of the faucet valve body during installation.

Key Features

• Left-hand orientation for correct cold-side installation in washerless faucet assemblies
• Designed as an OEM-style replacement stem bonnet for faucet rebuild applications
• Washerless design reduces wear points compared to traditional compression stem assemblies
• Threaded construction for secure seating within the faucet body

Compatibility

Designed as an OEM-style replacement stem bonnet for washerless faucet valve assemblies requiring a left-hand stem bonnet component.

Installation Notes

Installation is performed by a licensed plumber or qualified service technician. Shut off the water supply at the fixture stop valve or main shutoff before beginning any faucet stem or bonnet service. Use the appropriate basin wrench or deep socket to remove and reseat the bonnet without cross-threading. Verify left-hand versus right-hand orientation before installation to ensure proper valve function and seal integrity.

Technical Specifications

• Orientation: Left Hand
• Valve Type: Washerless
• Component Type: Stem Bonnet

Standard Information

• Brand: UNION BRASS
• Manufacturer Part Number: 80080