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The PLUMB PAK 20-6WK is a white plastic extension tube designed to extend or connect drain lines under sinks and lavatories. Measuring 1.5 inches in diameter and 6 inches in length, it is used to close gaps between P-traps, slip-joint fittings, and drain tailpieces. Constructed from durable plastic, it is lightweight and resistant to common household drain conditions. Plumbers and drain service technicians install this tube as part of standard lavatory or kitchen sink drain assemblies.
This extension tube is suited for residential plumbing applications where additional drain line length is needed to make up the distance between a sink tailpiece and a P-trap or branch drain fitting. It is commonly used during sink installations, replacements, or repairs where existing tubes are cracked, too short, or incompatible. The 1.5-inch slip-joint sizing is standard for lavatory and kitchen sink drain configurations.
Designed as an OEM-style replacement for standard 1.5-inch slip-joint residential sink drain assemblies.
Installation is performed by a licensed plumber or qualified tradesperson following local plumbing codes, including applicable IPC guidelines. Shut off the water supply and clear standing water from the drain before beginning work. Hand-tighten slip-joint nuts to form a watertight seal, then verify with a short flow test. Avoid over-tightening plastic slip-joint connections, as this can crack fittings.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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