Water Heater Parts of 2025

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Last Updated - May 13, 2025

Best Choice

1

Clicked 69 times in the last month

Ranein
Ranein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater

9.5 worth the money

9.1 Easy installation

8.7 Long life

Why we love it

Instant hot water on demand.

Easy installation with included vent pipe.

Energy-efficient with reduced heat loss.
Main highlights

Continuous_Hot_Water_Availability
Provides up to 3.6 GPM, supporting multiple outlets simultaneously.

Ideal_for_Multi-Point_Households
Perfect for homes needing hot water in bathrooms, kitchens, and bars.

Ease_of_Installation_Praised
Customers love the straightforward installation and setup process.
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9.8

Exceptional

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Value for Money

2

Chromex
Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump

9.9 Easy installation

9.9 Simple to use

9.7 Instruction

Why we love it

Easy to use.

Extend water heater lifespan.

Safe and non corrosive.
Main highlights

Key Features
Comprehensive kit includes 5-gallon bucket, 1/6 HP pump, hoses, descaler solution, and pump grate; safe for various materials and systems.

Ideal Use Cases
Perfect for owners of Rinnai, Bosch, Noritz, and other tankless water heaters looking to improve efficiency and extend lifespan with easy maintenance.

Customer Praise
Most reviews highlight the ease of use and effectiveness of the cleaning solution, appreciating the straightforward instructions and quick cleaning process.
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9.6

Exceptional

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3

ClimaTek
WV8840B1158 - OEM Upgraded Water Heater NG Gas Valve Replaces Honeywell

Why we love it

Reliable OEM replacement for Honeywell valves.

Durable and built to last.

Compatible with multiple water heater models.
Main highlights

OEM Quality Replacement
This upgraded gas valve replaces part WV8840B1158, ensuring top-notch performance and reliability.

Versatile Use Cases
Ideal for homeowners needing a reliable gas valve for Honeywell water heaters and more.

Durability Praised
Customers frequently commend its long-lasting build and dependable operation.
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9.5

Excellent

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4

Lamudo
9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005(12-month warranty)

8.9 Easy installation

8.7 Temperature control

8.4 materials Quality

Why we love it

High compatibility with various water heater brands.

Includes all necessary components for easy installation.

12-month warranty ensures long-term reliability.
Main highlights

Upgraded Replacement Pilot Assembly
This 9003542 pilot assembly is designed for natural gas water heaters, made of premium material, offers stable and durable performance, and includes a 12-month warranty.

Ideal for Natural Gas Water Heaters
Perfect for replacing the pilot assembly in Reliance, A.O.Smith, Kenmore, State GS and GSX natural gas water heaters, ensuring compatibility and ease of installation.

Exact Replacement and Easy Installation
Customers appreciate the exact fit and straightforward installation process, with many noting it resolved their water heater issues quickly and efficiently.
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9.2

Excellent

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5

Reliance
Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters

8.2 Easy installation

8.0 worth the money

Why we love it

Durable value

Professional installation

Quality manufacturing
Main highlights

Key Features
Enhances safety and efficiency in gas appliances, manufactured in China, ensuring reliable performance and adding significant value to your setup.

Ideal Use Cases
Perfect for professional installation in residential or commercial gas systems, optimizing functionality and ensuring compliance with safety standards.

Customer Reviews
Most praised for its durability and reliability, customers appreciate the peace of mind and quality assurance it offers.
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9.1

Excellent

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6

DROMIX
EWH-01 Electric Water Heater Tune-Up Kit, Includes Two Water Heater Thermostats, Two Water Heater Heating Elements - 4500W 240V, T-O-D Style Thermostat, Water Heater Replacement Parts

9.3 Easy installation

8.7 worth the money

8.0 Simple to clean
Main highlights

【Versatile Fits】The Tune-up Kits in Plumber's pack Fits Most Water Heaters with Dual Elements - Rheem, A.O Smith, Whirlpool, GE, Richmond, Ruud, BRADFORD WHITE; CRAFTMASTER; GENERAL ELECTRIC; GS WOOD; KENMORE; LOCHINVAR; RELIANCE; RICHMOND; STATE; MOR-FLO; APCOM etc
【ONE YEAR WARRANTY】Z Turn-up Kit Includes (2) 4500W 240V COPPER Water Heater Element, Insert Length: 13-9/16". 3500W@208V. Fit Most Brands of Water Heater >= 30 Gallons.
【ONE YEAR WARRANTY】Includes (1) Upper Water Heater Thermostat, (1) Lower Water Heater Thermostat, 120V ~ 480V
【More Durable】Extra Longer Life of Heating Element with Chromed Coating on the Heating Area
【Interchangeable】Therm-O-Disc Type Thermostat, Can interchange with APCOM type.
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9.0

Excellent

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7

Honeywell
Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1" Cavity made by Resideo
Main highlights

Temperature ratings: ambient-- 0 c to 60 c. Inlet/Outlet Size (in.) - 1/2 inch. NPT x 1/2 inch. Inverted Flare. Capacity - Min. 30 ft3/hr, Max. 75ft3/hr
Temperature Range: 32 to 150 F
Pressure regulator setting (psi): 5.0 in. Wc
Mounting in the upright position
An included integrated NTC temperature sensor reads water temperature within the appliance up to 221 F (105 C)
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8.8

Very Good

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8

HYDRO MASTER
HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass

9.1 Easy installation

8.9 Simple to use

8.4 worth the money

Why we love it

Lead Free: Safe drinking water

Colored handles: Easy hot/cold identification

CSA Certified: Quality assured
Main highlights

Key Features and Benefits
Lead-free brass, 3/4-Inch IPS, easy identification colored handles, includes pressure relief valve, CSA certified, easy installation.

Ideal Use Cases
Perfect for tankless water heater installations requiring safe, lead-free components and effective system isolation for maintenance.

Customer Reviews Summary
Highly praised for its straightforward installation process and the reliable, easy-to-use color-coded valve handles.
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8.7

Very Good

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9

Corro-Protec
Corro-Protec Powered Anode Rod for Water Heater, 20-Year Warranty, Eliminates Rotten Egg/Sulfur Smell within 24 hours, Stops Corrosion and Reduces Limescale, Electrical Anode Rod Made of Titanium

9.5 worth the money

9.5 Easy installation

9.5 Aroma
Main highlights

STANDARD DEDICATED ANODE PORT INSTALLATION [standard for all water heater brands except Bradford White] - This 40-89-gallon model is designed for installation in a dedicated anode port located on top of your water heater. If you need to install your anode in the hot water outlet instead (no anode port or old anode stuck), select our anode for Bradford White tank and hot water outlet installation.
SAY GOODBYE TO ODORS - Eliminate your water heater odor problem by removing the rotten egg smell in hot water with our advanced powered anode rod.
SAFE WITH ALL WATER SOURCES, TREATMENT SYSTEMS & WATER HEATER TYPES - Corro-Protec anodes are safe with any water sources [city and well water], water treatment systems [water softeners, filtration, reverse osmosis, etc.], and water heater tanks [electric, gas, solar, hybrid and geothermal].
PERMANENT CORROSION PROTECTION - Designed to replace your 40-89-gallon water heater’s hex head anode rod, it can defend against any level of water hardness, including the increased corrosiveness of softened water.
MAXIMUM DURABILITY WITH TITANIUM - Forget about the constant replacement of aluminum anode rods or magnesium ones—our titanium-made powered anode rod is maintenance-free and is made of materials that do not disintegrate.
MAXIMIZE ENERGY SAVINGS - Our energy-efficient design combats sediment build-up, enhancing water quality and prolonging tank life while saving you money on energy bills.
INSTALLATION SIMPLIFIED - We’ve included comprehensive, easy-to-follow step-by-step instructions, ensuring a smooth installation process of the water heater anode rod and its accompanying long 12-foot cord power supply. 1" 1/16 and 1" 3/16 sockets will be required for removal and installation.
HASSLE-FREE HOT WATER - Corro-Protec’s powered anode rods are revolutionizing the water heater maintenance by preventing and solving numerous water heater problems.
CERTIFIED LEAD-FREE - Our titanium mixed-metal oxide rod is not just lead-free but also boasts the prestigious Gold Seal by the Water Quality Association for your safety and trust.
20-YEAR WARRANTY & QUALITY – Manufactured in Canada since 2006, our hot water heater anode rod is backed by a 20-year warranty, fully compatible with your water heater warranty under U.S. MMWA law, and significantly extends the life of your tank.
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8.4

Good

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10

Rheem
Rheem AM39922-1 Water Heater Burner Assembly Kit - RG40S-40 Natural Gas

9.9 Easy installation

8.0 worth the money

Why we love it

Easy Installation

High Quality

Long Lasting
Main highlights

Key Features
Efficient heating with robust design, this RG40S-40 Natural Gas Burner Assembly Kit ensures consistent performance and durability for long-term use.

Ideal Use Cases
Perfect for residential water heaters requiring natural gas, excels in environments needing reliable hot water supply without frequent maintenance.

Customer Reviews Summary
Most praised for its easy installation process and significant improvement in water heater efficiency, leading to positive feedback from numerous users.
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8.3

Good

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Water Heater Parts of 2025

1

Ranein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater

Why we love it

2

Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump

Why we love it

3

WV8840B1158 - OEM Upgraded Water Heater NG Gas Valve Replaces Honeywell

Why we love it

4

9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005(12-month warranty)

Why we love it

5

Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters

Why we love it

6

EWH-01 Electric Water Heater Tune-Up Kit, Includes Two Water Heater Thermostats, Two Water Heater Heating Elements - 4500W 240V, T-O-D Style Thermostat, Water Heater Replacement Parts

7

Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1" Cavity made by Resideo

8

HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass

Why we love it

9

Corro-Protec Powered Anode Rod for Water Heater, 20-Year Warranty, Eliminates Rotten Egg/Sulfur Smell within 24 hours, Stops Corrosion and Reduces Limescale, Electrical Anode Rod Made of Titanium

10

Rheem AM39922-1 Water Heater Burner Assembly Kit - RG40S-40 Natural Gas

Why we love it

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