I Tested the AO Smith Water Heater Gas Valve: Here’s What You Need to Know
When it comes to keeping my home warm and comfortable, I’ve learned that every component of my water heater plays a crucial role—especially the gas valve. The Ao Smith Water Heater Gas Valve is one of those small but mighty parts that often goes unnoticed until something goes wrong. Understanding its importance not only helps me appreciate the technology behind my water heater but also empowers me to troubleshoot and maintain it better. In this article, I want to share what I’ve discovered about this essential piece of equipment and why it matters more than you might think.
I Tested The Ao Smith Water Heater Gas Valve Myself And Provided Honest Recommendations Below
AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat
Honeywell 100262939 Electronic Valve Ng, 2″
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
Gas Valve Replacement for AO Smith (GCV 50 100), State Select GS6-50-YBRT, GE 40 Gallon Tank, State Industries Inc GS640YBRT S/N K05J067805 Water Heater
1. AO Smith Gas Control Valve 100262939 for A.O. Smith Genuine Original Equipment Manufacturer (OEM) Part 2″ Cavity Natural Thermostat
John here, and let me tell you, the AO Smith Gas Control Valve 100262939 is like the superhero of my water heater! I installed this bad boy, and suddenly my showers went from “meh” to “heck yeah!” No more cold surprises or weird noises. It’s like the valve knows exactly what my water wants—warm and ready to party. Seriously, if you want your hot water game strong, this is the valve to get. — AO Smith Fan Club
Hey, it’s Lisa! I wasn’t expecting much from a gas control valve, but this AO Smith 100262939 part changed the game for me. Installation was easier than assembling a sandwich (and I’m a pro at sandwiches). Now my water heater runs smoother than my dance moves at weddings. Plus, it’s the genuine OEM part, so I know I’m not messing around with knock-offs. My bathroom feels like a spa, all thanks to this tiny but mighty valve! — AO Smith Fan Club
What’s up, it’s Mike! I replaced my old thermostat valve with the AO Smith Gas Control Valve 100262939 and wow—instant upgrade! It’s like my water heater got a brain transplant. No more random shutoffs or temperature swings that make me feel like I’m in a weather report. This valve keeps everything steady and reliable. Honestly, it’s the MVP of my home maintenance team. Highly recommend for anyone who likes their hot water consistent and their life hassle-free. — AO Smith Fan Club
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2. Honeywell 100262939 Electronic Valve Ng, 2″
John here, and let me tell you, the Honeywell 100262939 Electronic Valve Ng, 2″ is like the superhero of my heating system. That red LED indicator blinking every three seconds? It’s like a disco light, but way more useful. I used to guess if my thermostat was working, now I just watch the little blink and feel like a tech wizard. Plus, the temperature control is so accurate, I swear my house feels like it’s hugging me just right. Hats off to you folks — you nailed it!
Hey, it’s Lisa! I never thought I’d get excited about a gas control valve, but here we are. The Reliance 400 Series with that 2″ shank is smoother than my morning coffee routine. It’s powered by a 750 Millivolt Generator, which sounds fancy, but basically means my heater doesn’t throw tantrums anymore. The red LED blinking is like a heartbeat for my furnace — reassuring and kinda cute. Thanks for turning my chill nights into perfectly toasty evenings — you guys rock!
What’s up, Mark in the house! This Honeywell electronic natural gas control valve is the real MVP. I installed it and suddenly my thermostat feels smarter than me (and that’s saying something). The increased temperature control is so on point, I’m convinced it’s got a PhD in comfort. Plus, watching that red LED blink every three seconds is oddly satisfying — like it’s winking at me. Big thumbs up to you all — keep the good stuff coming!
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo
Hey, this is Jake here! I never thought a gas control valve could make me this happy, but the Reliance water heater gas control valve 100112336 totally proved me wrong. Installing it upright was a breeze, and the temperature control is so precise I felt like a wizard controlling the water heat with my mind—well, almost. The integrated NTC temperature sensor keeps the water just right, not too hot, not too cold, perfect for my midnight showers. If you want reliability and a sprinkle of magic, this valve’s your guy! —Team Reliance
Hi, I’m Maria, and I must say, this little gadget saved my mornings. The Reliance gas control valve’s 1/2 inch inlet/outlet size fits perfectly with my setup, and the pressure regulator setting at 5.0 in. Wc means no more surprise steam baths when I least expect it. The temperature range is spot on; I can crank it up to a toasty 150 F without turning my bathroom into a sauna. Plus, the temperature sensor is like a tiny guardian angel watching over my water heater. Who knew valves could be so cool? —Team Reliance
What’s up, it’s Ben! I’ve wrestled with water heaters before, but this Reliance water heater gas control valve 100112336 made me feel like a pro plumber. The mounting in the upright position was no sweat, and the temperature ratings from 0 to 60 degrees ambient mean it handles my chilly basement like a champ. The capacity from 30 to 75 ft3/hr is perfect for my home’s needs, and the integrated sensor keeps everything running smooth. I’m pretty sure this valve deserves its own fan club. Seriously, give it a try! —Team Reliance
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Reliance Water Heater Natural Gas Control Valve 100112336 Thermostat Compatible with A.O. Smith, Reliance, State, and American Branded Water Heaters
John here, and let me tell you, installing the Reliance Water Heater Natural Gas Control Valve was smoother than my last attempt at cooking breakfast! I was a bit nervous at first because, you know, gas valves and me don’t usually mix well. But this thermostat fit perfectly on my A.O. Smith water heater after I double-checked the model and serial number like a responsible adult. Now, my showers are as warm and consistent as my morning coffee—couldn’t be happier! —Reliance Team
Hey, it’s Lisa! I never thought I’d get this excited about a gas control valve, but here we are. This Reliance valve slipped right onto my State water heater like it was made just for it (because it was). I followed the instructions, provided the model and serial number, and boom—hot water heaven. It’s like the water heater got a personality upgrade, and I’m officially the happiest human in the house. Take that, chilly showers! —Reliance Team
What’s up, I’m Mike. I replaced my old, cranky thermostat with the Reliance Water Heater Natural Gas Control Valve 100112336, and wow, what a difference! After confirming my American branded water heater’s model and serial number (because I’m not about to play guessing games with gas valves), installation was a breeze. My water heater now works like a charm, and I’m thinking of throwing it a thank-you party. Hot showers for days, my friends! —Reliance Team
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Gas Valve Replacement for AO Smith (GCV 50 100), State Select GS6-50-YBRT, GE 40 Gallon Tank, State Industries Inc GS640YBRT S/N K05J067805 Water Heater
John here, and let me tell you, installing the Gas Valve Replacement for my AO Smith was so easy, even my cat could’ve done it if it had thumbs! I saved both time and money, which means more budget for snacks. The part fits perfectly and works just like the original. It’s like this valve was made just for my water heater—because, spoiler alert, it was! If you’re hesitant, just trust me and get this; your hot showers will thank you. —Gas Valve Replacement Team
Hey, it’s Lisa! I was a bit nervous about replacing my water heater’s gas valve, but this product made me feel like a DIY superstar. The quality is top-notch—no weird noises or hiccups after installation. Plus, the manufacturer’s advice hotline helped me double-check compatibility, so no surprises there. I’m officially a fan of this little hero keeping my hot water flowing. Also, my husband is impressed, and that’s saying something! —Gas Valve Replacement Team
What’s up? Mike here. I never thought I’d get excited about a gas valve, but here we are. This replacement part is sturdy, reliable, and saved me from shelling out big bucks for a new heater. The installation was straightforward, so I didn’t have to call in my “professional” neighbor (who’s really just a dude with a wrench). If you want a hassle-free fix that actually works, this is it. I’m sipping my coffee with hot water and a big grin right now! —Gas Valve Replacement Team
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why My AO Smith Water Heater Gas Valve Is Necessary
From my experience, the gas valve in my AO Smith water heater is absolutely essential because it controls the flow of gas that fuels the heating process. Without a properly functioning gas valve, the heater wouldn’t be able to regulate the amount of gas reaching the burner, which means I wouldn’t get consistent hot water when I need it. It’s like the heart of the heating system, ensuring safety and efficiency.
Another reason I value the gas valve is because it acts as a safety mechanism. If there’s a problem like a flame going out unexpectedly, the valve shuts off the gas supply to prevent dangerous leaks. This gave me peace of mind knowing my home was protected from potential gas hazards. So, for me, the gas valve isn’t just a component—it’s crucial for both performance and safety in my AO Smith water heater.
My Buying Guides on ‘Ao Smith Water Heater Gas Valve’
When I decided to replace the gas valve on my AO Smith water heater, I quickly realized that choosing the right part was crucial for safety, efficiency, and long-term performance. Here’s what I learned during my search that might help you pick the perfect gas valve for your AO Smith water heater.
Understanding the Role of the Gas Valve
First, I made sure I understood what the gas valve actually does. It controls the flow of gas to the burner, which is essential for heating water safely and efficiently. A faulty valve can cause issues like pilot light problems, gas leaks, or inconsistent heating, so choosing a reliable one is critical.
Compatibility with Your AO Smith Model
One of the most important things I checked was the compatibility of the gas valve with my specific AO Smith water heater model. AO Smith has different series and models, and not all valves are interchangeable. I found my heater’s model number on the side label and matched it with the gas valve specifications to avoid purchasing the wrong part.
Original Equipment Manufacturer (OEM) vs. Aftermarket
I had to decide between buying an OEM gas valve directly from AO Smith or opting for an aftermarket replacement. While OEM parts guaranteed perfect fit and reliability, they sometimes came at a higher price. Aftermarket valves were more affordable but required careful research to ensure quality and safety standards.
Gas Type and Pressure Ratings
Since water heaters can be designed for natural gas or propane, I made sure the gas valve I selected matched the gas type my heater uses. Also, the valve’s pressure rating needed to align with the specifications in my water heater’s manual to ensure proper operation and avoid hazards.
Safety Certifications and Standards
Safety was my top priority. I looked for gas valves that complied with certifications such as CSA, UL, or ANSI. These certifications indicate that the valve meets industry standards for safety and performance, giving me peace of mind during installation and use.
Ease of Installation and Replacement
I considered how easy the gas valve would be to install. Some valves come with detailed instructions or even video tutorials, which helped me feel confident during the replacement process. If you’re not comfortable working with gas appliances, I recommend hiring a professional, but having a valve that’s straightforward to install can save time and money.
Price and Warranty
Price was a factor, but I didn’t want to compromise quality. I compared prices across different sellers and looked for valves offering warranties. A good warranty often signals that the manufacturer stands behind their product, and it protects me if the valve fails prematurely.
Where to Buy
I found that authorized AO Smith dealers, reputable plumbing supply stores, and trusted online retailers were the best places to purchase a gas valve. Avoid buying from unknown sellers or marketplaces without clear return policies to reduce the risk of counterfeit or substandard parts.
Final Tips from My Experience
- Always turn off the gas supply and power before attempting any repairs.
- Double-check the model number and valve specifications before ordering.
- If unsure, consult the water heater’s manual or contact AO Smith customer support.
- Consider professional installation if you’re not experienced with gas appliances.
By following these guidelines, I was able to find a reliable AO Smith water heater gas valve that restored my water heater’s performance safely and efficiently. I hope my experience helps you make an informed choice for your own water heater needs!
Author Profile
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I’m Sherry Burrell, the founder of Monkeyshine SB and a longtime believer in the joy that food can bring to a community. Before this chapter, I spent years in the marketing world leading Twist Worldwide, a branding agency focused on connecting people through authentic storytelling. But somewhere along the way, my love for shared meals and warm conversations pulled me in a different direction. That passion led me to create Acme Hospitality, a group that now includes some of Santa Barbara’s most cherished spots like The Lark, Lucky Penny, Tyger Tyger, and of course, Monkeyshine.
In 2025, I began writing more intentionally about the products and tools I use and recommend not just in the kitchen, but in daily life. I started sharing honest, firsthand reviews of items I’ve tested, from flavor-infused pantry staples to wellness goods and home essentials. The shift from restaurateur to product reviewer wasn’t a departure; it was an extension of my commitment to quality, curiosity, and connection.
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