The plumbing under a sink, specifically highlighting a slip joint connection circled in black. The connection involves a vertical tailpiece from the sink that slides into a trap adapter or pipe, secured with a threaded slip nut. The red washer inside helps form a watertight seal when the nut is tightened. If leaking occurs at this joint, it’s often due to the washer being misaligned or the nut not being tightened enough—hand-tight with a slight turn using pliers usually suffices. These fittings are common in sink drain assemblies due to their ease of installation and maintenance. The surrounding fittings, including the P-trap, also use similar slip joint connections for flexibility. Proper alignment and washer placement are crucial to prevent drips or leaks at any of these joints.
How Slip Joint Connections Work in Sink Drains—And How to Fix Leaks
2025 05/09