40-1/2" Long Dip Tube

OEM Cold Water Inlet Tube for Bradford White Tank Water Heaters

The Bradford White 415-51230-18 dip tube is a direct replacement component used in select Bradford White residential tank-style water heaters. This model features an integral 2-inch nipple and measures 40-1/2 inches in total length. The dip tube functions as a cold water inlet extension, directing incoming water to the bottom of the tank to maintain stratified temperature layering and ensure consistent hot water draw-off.

Manufactured from durable, corrosion-resistant polymer, this dip tube is designed to withstand thermal cycling and extended service in potable water systems. Its application is critical to maintaining heater efficiency and maximizing usable hot water volume.

Component Details

• Part Number: 415-51230-18
• Length: 40.5 inches overall
• Nipple Size: 2 inches, pre-attached
• Material: Thermoplastic/polymer construction rated for potable hot water systems
• Connection: 3/4" NPT threaded inlet

Function and Application

• Guides cold inlet water to the tank base to preserve temperature stratification
• Prevents short-cycling and premature mixing of cold and hot water layers
• Optimizes tank heating efficiency and supports peak flow rate performance

Compatible exclusively with Bradford White models designed to accept 2" nipple dip tubes of this specification. Always verify part number and tank model compatibility through manufacturer documentation or service bulletins prior to replacement.

Installation Considerations

This dip tube is threaded and designed for top-entry cold inlet ports. System must be depressurized and drained below the port prior to removal and installation. Thread sealant or PTFE tape is required to ensure a leak-free seal. Installation should be completed by a qualified plumbing professional to verify correct seating depth, orientation, and to comply with local codes. Use care to avoid damaging the tank lining during removal or reinsertion of the tube.

Field Service Notes

Dip tubes are a routine wear component in tank water heaters and should be inspected or replaced during service events involving flow complaints, uneven temperatures, or after extended service intervals. Degraded or cracked dip tubes can result in reduced hot water delivery, poor temperature recovery, and increased energy consumption.

Features Summary

• OEM Construction: Precision-fit part for factory performance restoration
• Resin-Based Material: Compatible with potable systems and rated for standard water chemistry
• Thermal Stability: Maintains structural integrity under repeated heating cycles
• Integral Nipple: Factory-installed 2" galvanized nipple for secure tank connection