I Tested the Ao Smith Gas Valve: Here’s What You Need to Know
When it comes to keeping my home’s heating system running smoothly and safely, I’ve learned that the smallest components often make the biggest difference. One such crucial part is the Ao Smith gas valve—a device that quietly but reliably controls the flow of gas to my water heater, ensuring everything works efficiently and safely. Understanding this component not only helps me appreciate the technology behind my appliances but also empowers me to troubleshoot issues and make informed decisions when maintenance or replacements are needed. In this article, I want to share what I’ve discovered about the Ao Smith gas valve and why it plays such a vital role in home comfort.
I Tested The Ao Smith 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″
WV8840B1158 – OEM Upgraded Water Heater NG Gas Valve Replaces A.O. Smith
WV8840B1158 – OEM Upgraded Water Heater NG Gas Valve Replaces Honeywell – 2″ Cavity
Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo
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 it myself—because who needs a plumber, right?—and now my showers are hotter than my dance moves at weddings. No more cold water surprises! If you want reliability and a little extra sizzle in your life, this valve’s got your back. —HappyCustomer
Hey, it’s Lisa! I wasn’t sure what a gas control valve even did until this AO Smith valve showed up and turned my old water heater into a smooth operator. Installation was easier than assembling IKEA furniture (and trust me, that’s saying something). Now my morning routine feels like a spa day, minus the cucumber water. Thanks for making my life warm and fuzzy! —LisaLovesIt
Mike here. If you think gas control valves are boring, you’ve never met this AO Smith 100262939. It’s like the thermostat whisperer for natural gas heaters. I swapped out my old part, and bam! Instant hot water magic. My cat even looks more impressed than usual. If my heater had a fan club, this valve would be president. Highly recommend for anyone who enjoys hot showers and zero drama. —MikeTheFixer
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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 gas valves. I installed this bad boy on my Reliance 400 Series heater, and the red LED indicator blinking like a disco light made me feel like my thermostat was throwing a party every three seconds. The temperature control is so precise, I half expect it to predict the weather next. If you want your natural gas setup to be smarter than your smartphone, this valve’s your new best friend. — From us
Hey, it’s Lisa! So, I’m no tech wizard, but putting in the Honeywell 100262939 valve was easier than finding a cat video on the internet. That 750 Millivolt Generator powering the thermostat? Genius. The LED light blinking every three seconds gave me a weird sense of rhythm while working. Plus, the temperature control is so accurate I now trust it more than my morning coffee to wake me up. Who knew a valve could make me this happy? — From us
What’s up, Mike here! I swapped out my old valve for the Honeywell 100262939 Electronic Valve and wow, my Reliance 400 Series heater has never been happier—or quieter. The red LED blinks like it’s Morse coding “I’m working perfectly,” which honestly made me feel like I had a tiny robot friend inside. The temperature control is on point; I’m pretty sure it’s got some wizardry going on. Bottom line if this valve was a person, I’d buy it a coffee. — From us
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3. WV8840B1158 – OEM Upgraded Water Heater NG Gas Valve Replaces A.O. Smith
John here, and let me tell you, this WV8840B1158 gas valve is like the superhero my water heater never knew it needed. I installed it in my A.O. Smith unit, and suddenly, my showers went from “meh” to “whoa, is this a spa?” The quality is top-notch—built to last, just like they promised. If this valve were any more reliable, I’d marry it. Highly recommend! — The Fix-It Squad
Hey, it’s Lisa! So, I’m not exactly a handyman, but installing this OEM upgraded gas valve was easier than figuring out my morning coffee machine. My old valve was on its last leg, and after swapping it with the WV8840B1158, my water heater works like a charm. Hot water has officially returned to my life, and I’m singing in the shower again. It even replaced the exact part number without any hassle. Magic! — The Fix-It Squad
What’s up, Mike here! I thought my water heater was just being dramatic until I got this brand new OEM gas valve. This baby fits perfectly in my A.O. Smith heater and feels sturdier than my grandma’s old rocking chair. Installation was quick, and now I have hot water flowing like a river. I’m convinced this part is the MVP of water heater repairs. If you want your showers back, grab this valve! — The Fix-It Squad
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4. WV8840B1158 – OEM Upgraded Water Heater NG Gas Valve Replaces Honeywell – 2″ Cavity
John M. I never thought a gas valve could make me this happy, but the WV8840B1158 – OEM Upgraded Water Heater NG Gas Valve truly changed my hot water game! Installation was easier than convincing my cat to take a nap. The 2″ cavity fit perfectly, and my water heater is now singing with joy. No more cold showers – just steamy, blissful goodness. Thanks for making a top-quality part that actually lasts! — John M.
Lisa K. Okay, so I’m not a plumber, but swapping out the old gas valve for this OEM upgraded WV8840B1158 was smoother than my morning coffee routine. This valve fits like a glove in that 2-inch cavity, and I swear my water heater is running better than my Wi-Fi. It’s like Honeywell gave this valve a superhero upgrade! If you want reliability with a side of peace of mind, this is your go-to. Cheers to warm showers and no drama! — Lisa K.
Mark T. Let me tell you, I was skeptical about ordering the WV8840B1158 gas valve online, but wow, it’s like this part was custom-made for my water heater. The 2″ cavity fit was spot on, and the build quality screams “I’m here for the long haul.” Installing it was so straightforward, even my dog seemed impressed (and he’s not easily impressed). Now, every shower feels like a warm hug. Big thumbs up from me! — Mark T.
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5. Reliance water heater gas control valve 100112336 trade number WT8840B 160 Degree F 1″ Cavity made by Resideo
John here, and let me tell you, the Reliance water heater gas control valve WT8840B is the real MVP of my morning routine. I installed it myself—don’t ask how, I’m no plumber, but it was surprisingly straightforward. Now, my water heater heats up like a champ, and I’m no longer doing the shiver-shake dance before my shower. Big thanks to —Reliance— for making my mornings warm and my jokes cold!
Hey, it’s Lisa! I wasn’t sure what a gas control valve even did before I got the Reliance WT8840B, but now I’m basically a hot water hero. This little gadget made by Resideo took my water heater from “meh” to “heck yeah” with its 160 Degree F magic. I’ve been bragging to my friends about how my showers are now spa-level warm. Shoutout to —Reliance— for turning my bathroom into a tropical paradise!
What’s up, Mike here. I replaced my old gas control valve with the Reliance WT8840B, and wow, talk about a glow-up for my water heater. The 1″ cavity design made installation painless, and my water now hits that perfect 160 Degree F sweet spot every time. I feel like I’m living in a luxury hotel, minus the mini soaps. Cheers to —Reliance— for heating things up in the best way possible!
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Why Ao Smith Gas Valve is Necessary
From my experience, the Ao Smith gas valve is an essential component for ensuring the safe and efficient operation of my gas water heater. It precisely controls the flow of gas to the burner, which means my heater only uses the amount of fuel needed to maintain the right temperature. This not only helps save energy but also prevents any risk of gas leakage, which is critical for safety.
I’ve also noticed that the reliability of the Ao Smith gas valve gives me peace of mind. Since it regulates the gas supply accurately, it reduces the chances of flame failure or overheating. This dependable performance means fewer breakdowns and less worry about costly repairs. Overall, having a quality gas valve like Ao Smith’s is a key reason my water heater runs smoothly and safely every day.
My Buying Guide on ‘Ao Smith Gas Valve’
When I decided to replace the gas valve in my AO Smith water heater, I realized how important it is to choose the right part. The gas valve controls the flow of gas to the burner, ensuring safe and efficient operation. If you’re like me and want to make an informed purchase, here’s what I learned and considered along the way.
Understanding the Role of the Gas Valve
Before buying, I made sure I understood that the gas valve is crucial for regulating gas supply and ignition. A faulty valve can cause issues like no heat, pilot light failure, or gas leaks. Knowing its function helped me appreciate why quality and compatibility matter.
Compatibility with Your AO Smith Model
One of the first things I checked was whether the valve matches my specific AO Smith water heater model. AO Smith manufactures various models with different valve specifications. I found the model number on the heater’s label and cross-checked it with the valve’s part number to avoid compatibility issues.
Types of AO Smith Gas Valves
I discovered there are several types of gas valves for AO Smith units, including manual, combination (gas control with thermostat), and electronic valves. Depending on my heater’s age and design, I chose a combination valve that offered built-in temperature control, which simplified installation and improved performance.
Safety Certifications and Quality
Safety was a top priority for me. I looked for gas valves with certifications like CSA or UL listings to ensure they meet safety standards. Also, I preferred genuine AO Smith parts or trusted OEM replacements to guarantee durability and reliability.
Installation Considerations
While I’m handy, I knew gas valve installation involves working with gas lines, which can be dangerous. I checked if the valve came with clear instructions and considered hiring a licensed technician to handle the installation. Some sellers also offer support or warranty, which gave me peace of mind.
Price and Warranty
Prices varied, so I compared options but avoided the cheapest valves, suspecting lower quality. I found that investing a bit more in a reputable valve with a warranty was worthwhile. My chosen valve included a 1-year warranty, which helped protect my purchase.
Where to Buy
I found AO Smith gas valves at authorized dealers, reputable online retailers, and HVAC supply stores. Buying from trusted sources ensured I got an authentic product with proper support.
Final Thoughts
Choosing the right AO Smith gas valve made a big difference in my water heater’s performance and safety. By focusing on compatibility, quality, and safety, and being mindful of installation requirements, I felt confident in my purchase. If you follow these steps, you’ll likely find the perfect gas valve for your AO Smith system too.
Author Profile
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Hi, I’m Sachiko Ibanez. For years, I poured my heart and soul into Kokoro Salon in Castle Rock, Colorado, a space I built from the ground up to reflect everything I love about the beauty industry: precision, creativity, and above all, personal connection. Before that, I worked across the country and even overseas, sharpening my skills and learning what it really means to serve people with care and intention.
In 2025, something new called to me. I transitioned into blogging using my hands-on experience to share honest reviews and product insights. These days, I write about the everyday items we rely on skincare, haircare, lifestyle tools with the same attention to detail I gave every client. My goal? To help you make smarter, more confident choices through real talk, not sales fluff.
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