Ao Smith 100264227 Dip Tube Kit 0.65 in 40.5 in 3/4 Npt

Product Description

The AO SMITH 100264227 is a dip tube replacement kit designed for use in residential and light commercial water heaters. The dip tube directs cold incoming water to the bottom of the tank, keeping it separated from the heated water at the top and maintaining consistent hot water output. This kit measures 0.65 inches in diameter and 40.5 inches in overall length, with a 5.5-inch fitting section and a 3/4-inch NPT threaded connection for a secure, leak-free installation. It is installed by licensed plumbers or qualified water heater service technicians during routine maintenance or when a failed dip tube causes lukewarm water complaints.

This dip tube kit is suited for storage-tank water heater applications where the original tube has broken, deteriorated, or fragmented. Deteriorated dip tubes are a common cause of reduced hot water capacity and sediment buildup in the tank. The 3/4-inch NPT thread is a standard size found on many tank-style water heaters, and the 40.5-inch length is appropriate for tall-boy or standard residential tank configurations. Installation is typically performed during a service call when flow or temperature performance issues have been diagnosed.

Key Features

• 0.65-inch diameter tube directs cold water feed to the tank bottom for proper thermal stratification
• 40.5-inch length suits standard and tall residential water heater tank configurations
• 3/4-inch NPT threaded connection provides a standard, leak-resistant fit at the cold inlet port
• 5.5-inch fitting section allows proper seating and alignment at the tank inlet
• Replacement kit format includes components needed for a complete dip tube service

Compatibility

Designed as an OEM-style replacement dip tube kit for AO SMITH tank-style water heaters requiring a 0.65-inch diameter, 40.5-inch dip tube with a 3/4-inch NPT inlet connection. Verify tank dimensions and inlet thread size before installation.

Installation Notes

Dip tube replacement is performed by a licensed plumber or qualified water heater technician. Before beginning work, shut off the cold water supply and disconnect or turn off the power supply or gas valve to the water heater to prevent heating during service. Drain sufficient water from the tank to relieve pressure at the cold inlet before removing the old tube. Follow all applicable local plumbing codes and manufacturer guidelines when reinstalling the inlet fitting and restoring water supply.

Technical Specifications

• Tube Diameter: 0.65 inches
• Overall Length: 40.5 inches
• Fitting Section Length: 5.5 inches
• Inlet Thread Size: 3/4 inch NPT

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100264227