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The AO SMITH 100210051 is a replacement inlet tube assembly kit designed for water heater applications. This kit provides a complete inlet tube solution with a 3/4-inch NPT connection and a total length of 56.62 inches. It is used to route cold water into the tank and is a direct replacement component for serviceable AO SMITH water heater units. Licensed plumbers and water heater service technicians are the typical installers of this part during maintenance or repair procedures.
This inlet tube assembly kit is intended as a replacement part for residential water heater systems. The 3/4-inch NPT inlet connection matches standard residential supply line sizing, making it a straightforward fit for systems requiring this tube length. It is suited for installations where the original inlet tube assembly has corroded, cracked, or otherwise failed and needs to be swapped out to restore proper cold water delivery into the tank.
Designed as an OEM-style replacement inlet tube assembly for AO SMITH water heaters requiring a 3/4-inch NPT inlet tube with a length of 56.62 inches.
Installation should be performed by a licensed plumber following applicable local plumbing codes and IPC guidelines. Before beginning work, shut off the cold water supply and power or gas to the water heater to allow the unit to cool. Drain sufficient water from the tank to safely access the inlet assembly. Ensure NPT threads are properly sealed with approved thread tape or pipe compound before reinstalling fittings.
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