Ao Smith 100217958 Dip Tube Diffuser Kit 42 Inch

Product Description

The AO SMITH 100217958 is a dip tube diffuser kit designed as a direct replacement component for residential water heaters. The dip tube channels incoming cold water to the bottom of the tank, preventing it from mixing with the hot water at the top and maintaining consistent output temperature. This kit measures 42 inches in length with a 3/4-inch by 3-inch fitting size, making it a precise fit for compatible AO SMITH tank configurations. Installation is handled by licensed plumbers or experienced water heater service technicians during routine maintenance or when diagnosing reduced hot water output caused by a failed or broken dip tube.

This dip tube diffuser kit is used in residential storage-style water heater applications where the original dip tube has degraded, cracked, or broken apart. Fragments of a failed dip tube can restrict flow at fixtures, which makes timely replacement an important service call item. The 42-inch length and 3/4-inch inlet sizing suit standard tank configurations where this part is specified as a factory replacement. It is categorized as a replacement part and is appropriate for service work on water heaters that originally used this assembly.

Key Features

• 42-inch length fits standard AO SMITH water heater tank depths requiring this dimension
• 3/4-inch by 3-inch fitting size for precise cold-inlet connection
• Diffuser design helps reduce turbulence at the bottom of the tank, supporting thermal stratification
• Direct OEM replacement part for accurate fitment and performance
• Restores proper cold-water delivery to the base of the tank, maintaining hot water output quality

Compatibility

Designed as an OEM replacement dip tube diffuser kit for AO SMITH water heaters that specify part number 100217958. Consult the water heater model label and parts documentation to confirm fitment before installation.

Installation Notes

Dip tube replacement is performed by a licensed plumber or qualified water heater technician. Before servicing, shut off the cold-water supply and disconnect power or turn off the gas supply to the unit according to local plumbing codes and the manufacturer service documentation. Drain sufficient water from the tank to relieve pressure before removing the cold-inlet nipple and extracting the old dip tube. Inspect the inlet port for debris from a deteriorated tube before installing the replacement.

Technical Specifications

• Length: 42 inches
• Fitting Size: 3/4 inch x 3 inch
• Application: Replacement Part

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100217958