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The OATEY PP22026 is a 1/2-inch plastic basin locknut used to secure faucet shanks and supply risers to sink basins and lavatory decks. The locknut threads onto the faucet tailpiece from below the deck, clamping the faucet body firmly in place during installation. Its plastic construction resists corrosion in wet under-sink environments. Sold individually per bag, this fitting is a standard service item for residential faucet installations and rough-in replacements. Plumbers and plumbing technicians use this part during faucet swaps, new installations, and leak repairs where the original locknut is damaged or missing.
This locknut is suited for residential bathroom and kitchen faucet applications where a 1/2-inch threaded tailpiece is present. It fits typical lavatory faucets, bar faucets, and utility faucets with standard 1/2-inch shanks. The low-profile plastic design allows installation in confined under-sink cabinet spaces where clearance is limited. It is a common stocking item for plumbing service trucks and supply houses handling high-volume faucet replacement work.
Designed as an OEM-style replacement locknut for residential faucets with 1/2-inch threaded tailpieces, including lavatory, kitchen, and bar faucet applications.
Installation is performed by a licensed plumber or qualified plumbing technician. Shut off the water supply at the fixture stop valves and relieve line pressure before beginning faucet work. Thread the locknut onto the faucet tailpiece from below the deck and hand-tighten, then snug with channel-lock pliers - do not overtighten plastic locknuts, as excess torque can crack the nut or distort the faucet body. Work must comply with applicable local plumbing codes and IPC standards.
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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