Rheem Electric Marathon High-Efficiency
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10 year warranty
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Installation included
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Low noise levels
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Energy Efficient
Description
Description
Its award-winning construction makes the Rheem Marathon water heater the most durable electric water heater ever made. Its polybutene design makes the tank impervious to corrosion, and eliminates the need for an anode rod (preventing sulphur odors).
Offering an industry-best lifetime tank warranty, the Rheem Marathon electric water heater is a smart purchase you can count on for years to come.
Available in 40 & 50 gallon sizes.
Easy Installation and Service
- Lightweight design for a one-person, low-cost installation
- Quick maintenance thanks to a bowl-shaped tank bottom that drains completely and no anode rod to replace
Non-Metallic Tank
- Seamless, blow-molded polybutene inner tank will not rust or corrode
- Outer tank resists dents, scratches and salt air
- Offers the best durability, withstands the harshest environments, and eliminates smelly water due to chemical reactions with sulfates
High Efficiency
- Two-and-a-half inches of polyurethane foam insulation minimizes stand-by heat loss, allowing only 5°F loss in 24 hours – saving you money on your energy bill
Lifetime Tank Warranty
- This tank is built to last for as long as you own your home - versus typical water heaters, which need to be replaced every 10 years on average
- Eliminates repairs due to durability issues
- FREE warranty upgrade from 10 years to Lifetime if you register your water heater online
- Proven design since 1989
- Unmatched strength, toughness and durability
Installation
Installation
Size Guide
Size Guide
Choosing the right size
Use the chart below to help determine what size unit makes sense for your space.

Switch to an electric heat pump
Electric heat pumps offer an efficient way to reduce energy bills and carbon footprint by transferring heat rather than generating it. They provide both heating and cooling, using less energy than traditional systems. Grants and rebates make them a cost-effective, eco-friendly investment.



Learn more about heat pumps
What types of heat pumps do you offer?
What types of heat pumps do you offer?
1Click specializes in cold-climate air-source heat pumps that have been tested and proven to be reliable, even in our cold Canadian winters. We offer both central ducted heat pump systems and ductless mini-split heat pumps. Our mini-split heat pumps are available in single-zone or multi-zone configurations to suit your needs.
What is the difference between a single-zone and multi-zone heat pump?
What is the difference between a single-zone and multi-zone heat pump?
Single-zone mini-split heat pumps have one indoor air distribution unit, generally called a “head”, that attaches to a single outdoor unit which looks similar to a standard air conditioner. Multi-zone mini-split heat pumps have multiple indoor units or heads that attach to a single outdoor unit. Choosing between the two depends on your home. Single-zone units are designed for keeping a small space or a specific room at a single temperature. Multi-zone units can serve more than one area independently and at different temperatures, making them flexible whole-home solutions.
Are electric water heaters better than gas?
Are electric water heaters better than gas?
There are a few reasons why switching to an electric water heater is better than gas. Gas water heaters are typically more expensive than electric ones, use more energy, and don’t last as long. In comparison, electric water heaters are generally cheaper, use less energy, and last longer. Win-win-win! Thought natural gas was the cheapest fuel source? Think again. Watch our video to find out why natural gas is not as cheap as you think.