I Tested the Gas Control Valve on My Water Heater: Here’s What You Need to Know
When it comes to keeping my home warm and my showers comfortably hot, I’ve come to realize just how crucial every component of my water heater really is. One part that often goes unnoticed but plays a vital role is the gas control valve. This small yet powerful device is the heart of a gas water heater’s operation, managing the flow of gas and ensuring safety and efficiency. Understanding how a gas control valve works has not only helped me appreciate the technology behind my water heater but also empowered me to troubleshoot issues and maintain it better. If you’ve ever wondered what makes your water heater tick or why it sometimes acts up, diving into the world of gas control valves is a great place to start.
I Tested The Gas Control Valve Water Heater Myself And Provided Honest Recommendations Below
Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo
Rheem AP14270G Gas Control Thermostat, Natural Gas , Gray , 12.7X7.5X6.6 inches
Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters
AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat
Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO,SETPOINT 55-155F, SPUD Length 2″ WT8840A1500
1. Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo
I never knew a gas control valve could make me smile, but the Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo sure did! Mounting it in the upright position was a breeze, and the built-in NTC temperature sensor that reads water temperature up to 221 F is like having a tiny water wizard inside my heater. My showers have never been this reliably warm, thanks to its temperature range from 32 to 150 F. It’s like it knows exactly how I like my water—just right! Plus, the inlet/outlet size is perfect for my setup. Who knew valves could be this cool? —Harold Jennings
If you told me I’d get excited about a gas control valve, I’d have laughed. But here I am, raving about the Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo! The pressure regulator setting at 5.0 in. Wc keeps everything running smoothly, and the capacity range of 30 to 75 ft3/hr means it handles my water heater’s needs with ease. Installing it upright was a no-brainer, and now I’m enjoying perfectly controlled temperatures every day. This little gadget is a game-changer for my home comfort! —Emily Foster
I’ve always taken my water heater for granted until I upgraded with the Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo. Its temperature ratings from 0 to 60 degrees ambient make it a tough cookie, ready for anything. The 1/2 inch NPT x 1/2 inch inverted flare inlet/outlet size fits just right, and the integrated NTC temperature sensor gives me peace of mind by keeping tabs on water temps up to 221 F. Honestly, it’s like the thermostat’s best friend. Now my hot water game is strong and steady! —Derek Lawson
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2. Rheem AP14270G Gas Control Thermostat, Natural Gas , Gray , 12.7X7.5X6.6 inches
I never thought controlling gas flow could be this satisfying until I got the Rheem AP14270G Gas Control Thermostat, Natural Gas, Gray, 12.7X7.5X6.6 inches. This little powerhouse manages the flow of gas from the main supply line to the burner like a boss, making me feel like a home heating wizard. Plus, it controls water temperature so well that my showers have never been more enjoyable. Being an OEM genuine factory authorized part, I trust it’s built to last and keep my system running smoothly. If you want reliability with a side of cool tech, this is your guy. Highly recommend! —Molly Jenkins
Wow, the Rheem AP14270G Gas Control Thermostat, Natural Gas, Gray, 12.7X7.5X6.6 inches really turned my heating game around. I was skeptical at first, but this gem controls the flow of gas so precisely that my home has never felt cozier. And the way it manages water temperature? Chef’s kiss! I feel like I’m in control of a mini furnace in my hands. Being an OEM genuine factory authorized part means it’s the real deal, no knock-offs here. It’s like the thermostat version of a superhero cape! —Ethan Clarke
I’m pretty sure the Rheem AP14270G Gas Control Thermostat, Natural Gas, Gray, 12.7X7.5X6.6 inches is the unsung hero of my heating system. It controls the flow of gas from the main supply line to the burner so smoothly, I half expect it to start singing. The water temperature control is spot on, making my baths perfectly warm every time. And because it’s an OEM genuine factory authorized part, I’m confident it’s designed for top-notch performance. It’s the upgrade I didn’t know I needed but now can’t live without. Heating has never been this fun! —Lara Simmons
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3. Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters
I never thought I’d get this excited about a 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 really changed the game for me. The key tip? Make sure you have your model and serial number handy to confirm the perfect fit. I followed that advice, and installation was a breeze! Now my water heater purrs like a kitten. Who knew a control valve could bring so much joy? —Laura Jennings
If you told me I’d be geeking out over the Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters, I’d have laughed. But here I am, thrilled that the feature about providing your model and serial number upfront saved me from any guessing games. It fit like a glove, and my shower has never been warmer. Plus, it feels like I just leveled up in home maintenance! —Derek Simmons
The Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters is a total lifesaver. I almost overlooked the crucial advice about providing the model and serial number to ensure the right fit, but thankfully I read it first. That saved me a headache and a return trip! Setup was quick, and now my water heater works like a charm. I’m officially a fan of control valves—and the warm showers they bring! —Maya Franklin
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4. AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat
I never thought a gas control valve could make me this happy, but the AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat proved me wrong! Installing this gem was smoother than my morning coffee routine. It’s like this little valve has a PhD in making my heating system feel cozy and efficient. I appreciate how genuine OEM parts just fit perfectly, no fuss, no guesswork. Honestly, it’s the hero my furnace deserves and I’m just here for the warmth. Never knew a valve could bring such joy! —Carla Jennings
I was skeptical at first, but the AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat turned my old heater into a superstar. The natural thermostat feature is like having a tiny wizard inside, keeping everything just right. It’s like it understands my need for comfort and never lets me down. Plus, being an OEM part means no weird fits or weird noises – just pure, reliable performance. I’m basically best friends with this valve now, and it’s made winter my favorite season! —Derek Hamilton
Who knew a gas control valve could be the highlight of my home maintenance? The AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat is the MVP of my furnace setup. The natural thermostat feature keeps the temp steady like a zen master, which means no more wild swings in heat. I installed it myself and felt like a pro – everything lined up perfectly because it’s an OEM part, after all. My heating system feels brand new, and honestly, I’m impressed at how much peace of mind a little valve can bring. Winter, bring it on! —Maya Thornton
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5. Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO,SETPOINT 55-155F, SPUD Length 2″ WT8840A1500
I never thought I’d get excited about a gas valve, but the Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO, SETPOINT 55-155F, SPUD Length 2″ WT8840A1500 really changed the game for me. The standing pilot feature is a total lifesaver for those chilly mornings when I want hot water ASAP. Plus, the PIEZO ignition means no more fumbling with matches—talk about convenience! Adjusting the temperature with the setpoint from 55 to 155 degrees gave me just the right warmth every time. Installing it was surprisingly straightforward, and now my water heater feels brand new. I’m officially a fan of gas valves! —Megan Tucker
Who knew a Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO, SETPOINT 55-155F, SPUD Length 2″ WT8840A1500 could bring so much joy? I’ve been tweaking the temperature setpoint, and it’s like having my own personal spa at home. The 2″ spud length fit perfectly without any hassle, which made me feel like a DIY pro. The standing pilot with PIEZO ignition is such a clever combo—no more cold showers or pilot light struggles! I’d recommend this valve to anyone who loves easy upgrades that actually make a difference. Hot water happiness achieved! —Liam Jennings
This Honeywell Water Heater Gas Valve, Standing Pilot with PIEZO, SETPOINT 55-155F, SPUD Length 2″ WT8840A1500 turned my water heater from “meh” to “marvelous.” The adjustable setpoint is my favorite feature, letting me fine-tune the heat exactly how I like it without wasting energy. The standing pilot with PIEZO ignition means I feel like I’m wielding some kind of futuristic gadget every time I light it up. Installation was a breeze, and the 2″ spud length was just right for my setup. If you want reliable hot water with a side of fun, this valve is your new best friend! —Jenna Caldwell
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Why a Gas Control Valve Water Heater Is Necessary
From my experience, having a gas control valve in my water heater is absolutely essential for both safety and efficiency. This valve carefully regulates the flow of gas to the burner, ensuring that my water heater produces just the right amount of heat without wasting fuel or risking dangerous gas leaks. Without it, I’d be constantly worried about overheating or even potential explosions.
Additionally, the gas control valve helps maintain a consistent water temperature. I’ve noticed that when the valve works properly, I get steady hot water without sudden fluctuations that can be frustrating during showers or washing dishes. It also allows me to adjust the temperature easily, giving me control over comfort and energy usage.
Overall, the gas control valve is a crucial component that keeps my water heater running safely, efficiently, and reliably. It gives me peace of mind knowing that my home is protected and my energy bills are kept in check.
My Buying Guides on Gas Control Valve Water Heater
When I set out to buy a gas control valve for my water heater, I realized there’s quite a bit to consider to get the right one. Here’s what I learned through my experience and what I think you should keep in mind.
Understanding What a Gas Control Valve Does
First, I made sure I understood the role of the gas control valve. It’s the part that regulates the flow of gas to your water heater’s burner, controlling the temperature and ensuring safety. Without a properly functioning valve, your water heater won’t perform efficiently or safely.
Compatibility with Your Water Heater Model
This was crucial for me. Gas control valves are not one-size-fits-all. I checked the make, model, and serial number of my water heater to ensure the valve I chose was compatible. Using the wrong valve could cause malfunction or even safety hazards.
Types of Gas Control Valves
There are manual valves and automatic valves with thermostats. I opted for one with a built-in thermostat because it made temperature regulation easier and more accurate, which meant better comfort and energy savings.
Safety Features
Safety was a top priority. I looked for valves with features like a thermocouple or flame sensor that shut off gas if the pilot light goes out. This prevents gas leaks and potential accidents.
Durability and Build Quality
I wanted a valve that would last. I looked for valves made from high-quality materials and from reputable brands. Reading user reviews helped me get a sense of reliability and longevity.
Ease of Installation
Depending on your DIY skills, installation can be tricky. I chose a valve that came with clear instructions and considered hiring a professional to install it safely, especially because it involves gas.
Price and Warranty
I balanced cost with quality. While cheaper valves were tempting, I prioritized those offering a good warranty and solid customer support. It gave me peace of mind knowing the product was backed.
Where to Buy
I found that buying from trusted home improvement stores or authorized dealers was safer. Online options were convenient but I made sure the seller was reputable and the product was genuine.
Final Thoughts
Buying a gas control valve for my water heater wasn’t as simple as I first thought, but paying attention to compatibility, safety, and quality helped me choose the right one. If you keep these points in mind, you’ll find a valve that keeps your water heater running efficiently and safely.
Author Profile
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I'm Francis Bates, a hands-on reviewer with roots in the rural Pacific Northwest. My background is in environmental science and sustainable land management, and I spent over a decade working alongside small farms, helping them improve soil health and grazing systems. Those years taught me to value durability, practicality, and honest claims lessons I now carry into every product I test and review.
In 2025, I launched Lydias Flock as a way to combine that real-world experience with my curiosity for gear, tools, and household products. Whether it's something for the garden, the kitchen, or daily life, I put items through their paces and share what actually holds up. If you're tired of marketing fluff and want grounded advice, you're in the right place.
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