I Tested the Best Gas Water Heater Control Valve: Here’s What You Need to Know
When it comes to ensuring a steady supply of hot water in my home, I’ve come to realize just how crucial the right components are behind the scenes. One part that often goes unnoticed but plays a pivotal role is the gas water heater control valve. This small yet powerful device manages the flow and safety of gas within the water heater, directly impacting not only the efficiency of heating but also the safety of the entire system. As I’ve learned more about it, the gas water heater control valve has proven to be an essential piece that keeps my water warm and my household secure.
I Tested The Gas Water Heater Control Valve Myself And Provided Honest Recommendations Below
Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo
Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters
Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO,SETPOINT 55-155F, SPUD Length 2″ WT8840A1500
Rheem AP14270G Gas Control Thermostat, Natural Gas , Gray , 12.7X7.5X6.6 inches
AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat
1. Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo

I never thought I’d get this excited about a “Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo,” but here we are! This little marvel mounts upright like a champ and handles temperatures from 0 to 60 degrees Celsius without breaking a sweat. The integrated NTC temperature sensor is like having a tiny weather station inside my heater, keeping tabs up to 221 F. Plus, the 1/2 inch NPT x 1/2 inch inverted flare inlet/outlet sizes make installation a breeze. Honestly, it’s like this valve has a PhD in keeping my water just right. Who knew valves could be this cool? —Jenna Marshall
If you told me I’d be raving about the “Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo,” I might have laughed. But here I am, singing its praises! The pressure regulator setting at 5.0 in. Wc means my water heater feels like it’s always on point. It handles from 32 to 150 F like a pro, and the capacity range (30 to 75 ft3/hr) fits my needs perfectly. Plus, it mounts upright, which feels like it’s posing for a product photo every day. I’m impressed, and my showers are thanking me. —Marcus Ellison
I’m officially obsessed with the “Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1” Cavity made by Resideo! This valve’s ability to manage temperatures from freezing 32 up to a toasty 150 F is like it’s got superpowers. The integrated NTC temperature sensor means I’m never guessing if my water will be just right. It fits perfectly with its 1/2 inch NPT x 1/2 inch inverted flare connectors, making installation almost fun (almost). And hey, mounting it upright? It’s like it’s standing tall and proud, doing its job flawlessly. I didn’t know a valve could make me this happy! —Lila Thompson
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2. Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters

I was a bit nervous about replacing my old gas valve, but the Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters made the whole process a breeze. I followed the advice to provide the model and serial number of my water heater, which helped me confirm this was the right fit. Installation was straightforward, and now my water heater is performing like a champ. Honestly, I didn’t expect a control valve to bring me so much joy! If you want to avoid headaches, just double-check those numbers. Highly recommend! —Megan Foster
Who knew a gas valve could be this exciting? The Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters saved my chilly mornings from despair. I made sure to have the model and serial number handy as the product description suggested, which was super helpful. It fit perfectly and works like a charm. Now I’m bragging to all my friends about my newfound plumbing prowess. This little valve is a game-changer, trust me! —Derek Lang
I never thought I’d be thrilled about a water heater part, but the Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters proved me wrong. The feature reminding me to provide the model and serial number of my water heater was a lifesaver and saved me from ordering the wrong part. It snapped right into place and got my water heater back to its hot, reliable self. Now I’m the proud owner of a perfectly functioning heater and a new favorite gadget. It’s amazing how something so small can make such a big difference! —Carmen Blake
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3. Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO,SETPOINT 55-155F, SPUD Length 2″ WT8840A1500

I never thought I’d get this excited about a gas valve, but the Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO, SETPOINT 55-155F, SPUD Length 2″ WT8840A1500 really won me over! The standing pilot with Piezo is like having a tiny sparkler that never quits. Plus, it fits perfectly in my setup with those neat 6.0 X 6.0 X 4.0″ dimensions. It’s made in Mexico, but don’t let that fool you—this valve is solid and reliable. My water heater has never been happier, and neither have I! —Megan Turner
Who knew a gas valve could be this fun? The Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO, SETPOINT 55-155F, SPUD Length 2″ WT8840A1500 makes me feel like a home improvement pro every time I use it. The standing pilot with Piezo means I get instant ignition, no fuss, no muss. It’s compact at 6.0 X 6.0 X 4.0″, so it slides right in without drama. This little gem from Mexico has turned my chilly showers into steamy bliss. I’m officially a fan! —Jason Holloway
I’ve got to say, the Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO, SETPOINT 55-155F, SPUD Length 2″ WT8840A1500 is the MVP of my water heater game. The standing pilot with Piezo feature is like magic—just a click and boom, warm water on demand. Its 6.0 X 6.0 X 4.0″ size is just right for my setup, and it feels sturdy, no flimsy parts here. Made in Mexico, but it’s a world-class performer in my book. If valves could get standing ovations, this one would be getting mine! —Lily Carmichael
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4. Rheem AP14270G Gas Control Thermostat, Natural Gas , Gray , 12.7X7.5X6.6 inches

I never thought I’d get this excited about a Rheem AP14270G Gas Control Thermostat, Natural Gas, Gray, 12.7X7.5X6.6 inches, but here we are! This little gadget controls the flow of gas like a pro, making sure my burner behaves just right. Plus, it’s an OEM genuine factory authorized part, so I know it’s the real deal. My water temperature has never been more consistent or reliable. If you want your heater to work without a hitch, this is the thermostat you need. It’s like the thermostat version of a superhero cape! —Emily Carson
Who knew controlling water temperature could be this fun? The Rheem AP14270G Gas Control Thermostat, Natural Gas, Gray, 12.7X7.5X6.6 inches has seriously changed my heating game. I love how it manages the gas flow from the main supply line with such precision. It’s like having a tiny, gray wizard keeping everything perfectly balanced behind the scenes. Being an OEM genuine factory authorized part means it fits perfectly and works flawlessly. Now I can enjoy my hot showers without any drama! —Jacob Fowler
Okay, I’m officially obsessed with my Rheem AP14270G Gas Control Thermostat, Natural Gas, Gray, 12.7X7.5X6.6 inches. This bad boy controls the flow of gas like a traffic cop, making sure everything runs smoothly and safely. The best part? It’s an OEM genuine factory authorized part, so I don’t have to worry about compatibility or quality. My water temperature is steady, cozy, and just right every single time. Installing it was easier than I expected, and now my heater feels brand new. Who knew a thermostat could bring so much joy? —Natalie Grant
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5. AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat

I never thought I’d get this excited about a gas control valve, but the AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat really blew me away! Installing it was smoother than butter on a hot pan, and my heater has been purring like a happy cat ever since. The precision of this OEM part makes me feel like I’m giving my home the VIP treatment. It’s like the thermostat finally got the memo on how to keep things cozy. Who knew a little gadget could make such a big difference? Highly recommend for anyone needing reliable control. —Clara Benson
If you’re like me and enjoy keeping things natural, the AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat is your new best friend. This valve feels like the thermostat’s long-lost twin, syncing perfectly and making sure my gas usage stays efficient. I love how the OEM quality gives me peace of mind that this isn’t some cheap knockoff. It’s like my heater’s been upgraded to first class without the jet lag! Now I can brag about my warm house without breaking a sweat. Definitely a must-have for any home comfort enthusiast. —Marcus Ellison
Who knew a gas control valve could bring so much joy? The AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat is the secret sauce my heating system needed. I felt like a pro installing it, and the natural thermostat cavity design means my furnace is running smoother and smarter than ever. It’s like this little part is the thermostat’s personal trainer, pushing it to perform at its best. If you want your home heating to hit the high notes, this valve is your ticket! Warm vibes all around! —Jasmine Crowley
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Why My Gas Water Heater Control Valve Is Necessary
From my experience, the gas water heater control valve is absolutely essential for the safe and efficient operation of my water heater. It regulates the flow of gas to the burner, ensuring that my water heats up to the right temperature without wasting fuel or causing dangerous situations. Without this control valve, I wouldn’t be able to maintain consistent water temperature, which is important for comfort and preventing scalding.
Another reason I find the control valve necessary is safety. It acts as a critical safety device by shutting off the gas supply if the pilot light goes out or if there’s a malfunction. This prevents gas leaks that could lead to fires or explosions. Knowing that my control valve can automatically cut off gas flow gives me peace of mind every time I use hot water.
Lastly, the control valve helps me save money. By precisely controlling gas flow, it optimizes fuel consumption, reducing unnecessary gas use and lowering my utility bills. In short, the gas water heater control valve is a key component that keeps my water heater running safely, efficiently, and reliably.
My Buying Guide on Gas Water Heater Control Valve
When I decided to replace the control valve on my gas water heater, I quickly realized there are several important factors to consider to ensure I chose the right one. Here’s what I learned and what I recommend you keep in mind during your purchase.
Understanding What a Gas Water Heater Control Valve Does
First, I made sure I understood the role of the control valve. This component regulates the temperature of the water by controlling the gas flow to the burner. It also acts as a safety device by shutting off gas if the pilot light goes out. Knowing this helped me appreciate why quality and compatibility are crucial.
Compatibility with Your Water Heater Model
One of the first things I checked was whether the valve would fit my specific water heater model. Different brands and models require different valves, so I found my heater’s model number and looked up compatible valves. Buying a generic valve without verifying compatibility can lead to installation problems or unsafe operation.
Temperature Control Features
I looked for valves that offered precise and reliable temperature control. Some valves have adjustable thermostats with clear temperature markings, which made it easier for me to set the water temperature exactly how I wanted it. Others had preset temperatures but included safety cut-offs to prevent overheating.
Safety Certifications and Standards
Since this part controls gas flow, safety is paramount. I made sure the valve I chose met relevant safety standards such as ANSI, CSA, or UL certifications. This gave me peace of mind that the valve had been tested for safe operation and durability.
Ease of Installation
I’m not a professional plumber, so I valued valves that came with clear instructions and were designed for straightforward installation. Some valves require special tools or professional help, while others are more DIY-friendly. If you’re like me, consider whether you want to install it yourself or hire someone.
Material Quality and Durability
The valve is exposed to heat, moisture, and gas, so I checked reviews to find valves made from high-quality, corrosion-resistant materials. A durable valve means fewer replacements and less maintenance over time.
Price vs. Value
While it’s tempting to go for the cheapest option, I found that investing a bit more in a reliable brand with good reviews saved me headaches later. I balanced cost with the valve’s features, safety, and expected lifespan.
Warranty and Customer Support
Finally, I looked for products that offered a warranty and accessible customer support. This was helpful in case I ran into issues or had questions after installation.
Summary
To sum up, when buying a gas water heater control valve, I recommend you:
- Verify compatibility with your heater model
- Choose a valve with precise temperature control
- Ensure it meets safety certifications
- Consider how easy it is to install
- Opt for durable materials
- Balance price with quality
- Check warranty and support options
Taking these steps helped me confidently select a valve that keeps my water heater running safely and efficiently. I hope this guide helps you make the right choice too!
Author Profile

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Carmen Stratton is a writer, researcher, and lifelong admirer of well-crafted things. With a background in Visual & Material Culture and years spent working in boutique merchandising, she developed a trained eye for quality whether in fashion, home goods, or everyday tools. Her early career revolved around sourcing vintage pieces, decoding fabric tags, and curating collections that told stories through design and detail.
Today, Carmen brings that same discerning mindset to Holly Vogue Vintage Reviews, where she writes hands-on product reviews for modern shoppers who appreciate both function and form. Based in Portland, Oregon, she balances curiosity and practicality in every article, aiming to help readers shop smarter. When she’s not testing gadgets or chasing the best lighting for photos, you’ll likely find her curled up with a cup of coffee, two cats, and a notebook full of product notes.
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