Cost to Replace a Water Heater Dip Tube

By Hannah Stephens

July 30, 2025

There's nothing more annoying than sinking into a well-deserved bath only to discover lukewarm or cold water. While your bath might be ruined, the good news is that inconsistent or downright chilly water often has a straightforward solution: your water heater dip tube.

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This guide explains how this essential part of your unit works and outlines how much a water heater dip tube replacement costs.

What Is a Water Heater Dip Tube?

A water heater dip tube transports cold water from the inlet pipe at the top of the unit to the bottom of the tank. It directs the cold water as close to the burners as possible, enabling the unit to heat water quickly and efficiently. Directing the water to the burners also stops it from mixing with the hot water higher up in the tank, preventing temperature fluctuations.

While most tanked water heaters have a dip tube, some have inlet pipes at the bottom of the tank. These models don't require a dip tube because the lower inlet directs water close to the heating element. Tankless water heaters don't have a dip tube because they heat water on demand instead of storing hot water inside a tank.

Symptoms of a Broken or Failing Water Heater Dip Tube

Dip tubes are usually made from durable plastic that can withstand the extreme temperatures inside your water heater. However, they can gradually degrade or become clogged with mineral deposits. When your dip tube fails, you'll likely notice lukewarm or fluctuating water temperatures when you turn on the hot water faucet. You may also see tiny pieces of plastic around faucets, showers and other plumbing fixtures.

How Much Does a Water Heater Dip Tube Replacement Cost?

According to HomeGuide, a water heater dip tube replacement costs between $10 and $20 (CAD 14 and CAD 28) for the part. Alternatively, you can hire a plumber to replace the dip tube for you. Most plumbers charge $100 to $300 (CAD 140 to CAD 419) to replace a dip tube, which includes the cost of the part, materials and installation labor.

Can I Replace My Water Heater Dip Tube Myself?

DIY dip tube replacement is relatively straightforward, and many homeowners decide to do the work themselves to save money. However, repairing your water heater yourself could void the warranty.

If your water heater is still under warranty, it's worth checking your documents or calling the manufacturer to check whether replacing the dip tube yourself affects your coverage.

Keep in mind that replacing the dip tube incorrectly could damage the water heater or prevent it from functioning properly. Consider hiring a professional to replace the dip tube unless you're confident in your DIY skills.

How Long Does It Take to Replace a Dip Tube?

Replacing a faulty water heater dip tube involves draining the tank, removing the defective tube and installing a new one. DIY replacements typically take around 1 to 4 hours, although the time required depends on the type of water heater and your skill level. A professional plumber can usually replace a dip tube quickly because they have more experience repairing water heaters.

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Is It Worth Replacing a Water Heater Dip Tube?

Replacing a water heater dip tube is usually worthwhile because it's straightforward and relatively inexpensive. A new dip tube can prevent further damage to your system while correcting low or fluctuating water temperatures.

However, replacing your water heater may be more cost-effective if it breaks frequently or is approaching the end of its lifespan. Determining whether it's better to repair or replace your water heater is complex, so it's a good idea to consult a professional plumber before deciding.

How Much Does Water Heater Repair Cost?

Your water heater may develop other problems if you delay replacing your broken dip tube. Water heater repair costs depend on the type and scale of the problem. According to HomeGuide, most repairs for a traditional tanked water heater cost between $150 and $700 (CAD 210 and CAD 978).

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