Larsen Supply Co., Inc. 142843 Silicone Slip Joint Washer

Product Description

The LARSEN SUPPLY CO., INC. 142843 is a 2-pack of silicone slip joint washers designed for 1-1/4 inch O.D. drain tubing commonly found in residential and light commercial plumbing systems. Each washer features a passive grip design that helps maintain a secure, leak-resistant seal at slip joint connections without the need for additional sealants. Silicone construction provides resistance to temperature extremes and chemical exposure, making these washers a durable choice for under-sink drain assemblies, P-traps, and similar slip joint applications. Licensed plumbers and experienced DIYers install these as part of routine trap service or drain line repairs.

These washers are suited for use in standard 1-1/4 inch O.D. slip joint plumbing drain configurations. Typical applications include bathroom sink P-traps, drain extensions, and tailpiece connections where a reliable compression seal is required. The silicone material holds up better than standard rubber in environments subject to hot water discharge or cleaning chemical exposure, making them a practical upgrade or replacement in both new installations and service calls.

Key Features

• Silicone construction resists heat, cold, and common drain cleaning chemicals
• Passive grip design helps seat and hold the washer during assembly
• Sized for 1-1/4 inch O.D. slip joint tubing
• Sold as a 2-pack for convenience on single-service calls or as a backup
• Carded packaging for easy retail or parts-counter display

Compatibility

Designed as an OEM-style replacement washer for standard 1-1/4 inch O.D. slip joint drain fittings used in residential and light commercial plumbing drain assemblies.

Installation Notes

Installation is performed by a licensed plumber or qualified tradesperson. Shut off the water supply and clear the drain line before disassembling slip joint fittings. Hand-tighten slip joint nuts to seat the washer, then snug with channel-lock pliers — avoid over-torquing, which can deform the washer and cause leaks. Verify the connection for leaks before returning the fixture to service.