Ao Smith 100108854 Diffuser Dip Tube Assembly 40 Inches

Product Description

The AO SMITH 100108854 is a diffuser dip tube assembly designed as a direct replacement component for compatible residential water heaters. At 40 inches in length, this assembly includes a gasket and is engineered to direct cold inlet water to the bottom of the tank, improving thermal stratification and overall heating efficiency. The dip tube keeps incoming cold water separated from the heated water near the top of the tank, reducing temperature mixing and maintaining consistent hot water output. This is a service and repair part installed by licensed plumbers and water heater technicians during routine maintenance or component failure replacement.

This dip tube assembly is suited for residential gas water heater applications. It is specifically referenced as a replacement part for the GCV-40-100 model. The included gasket simplifies reassembly and helps ensure a proper seal at the cold water inlet port. Technicians performing water heater service who encounter a broken, degraded, or missing dip tube will find this assembly a direct fit for the applicable unit.

Key Features

• 40-inch length positions cold water delivery at the tank base for proper thermal layering
• Includes gasket for a complete, ready-to-install assembly
• Diffuser design reduces turbulence at the cold water inlet
• OEM-style replacement part for applicable AO SMITH water heater models
• Supports efficient hot water delivery by minimizing cold and hot water mixing

Compatibility

This assembly is listed as a replacement part for the AO SMITH GCV-40-100 water heater model.

Installation Notes

Dip tube replacement is performed by a licensed plumber or qualified water heater technician. Before beginning, shut off the cold water supply and disconnect power or turn off gas to the unit to prevent accidental heating during service. The cold water inlet fitting must be fully disassembled to access and remove the existing dip tube, and the included gasket should be seated properly before reinstalling the inlet connection. Follow applicable local plumbing codes and manufacturer service documentation throughout the procedure.

Technical Specifications

• Length: 40 inches
• Includes: Gasket
• Application: Replacement Part

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100108854