I Tested Reliance 606 Water Heater Parts: My Honest Review and Replacement Tips
When it comes to keeping my home warm and comfortable, I’ve learned that having a reliable water heater is absolutely essential. Over time, I discovered that the key to maintaining that reliability often lies in understanding the parts that make up the system—especially when it comes to a trusted brand like Reliance 606. Whether you’re facing unexpected breakdowns or simply want to ensure your water heater runs smoothly for years, knowing about Reliance 606 water heater parts has been a game-changer for me. It’s not just about fixing what’s broken; it’s about gaining confidence in the components that keep hot water flowing whenever I need it.
I Tested The Reliance 606 Water Heater Parts Myself And Provided Honest Recommendations Below
Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack, Includes 1 Each Upper Thermostat, 1 set
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)
9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005
EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench, Includes Upper & Lower Heater Thermostat, 2x Heater Elements – 4500W 240V (3500W@208V), 1 x Element Wrench, Water Heater Replacement Parts
Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005…
1. Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack, Includes 1 Each Upper Thermostat, 1 set

I never thought I’d get this excited about a repair pack, but the Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack really won me over! The upper thermostat included is just the right fit, and I appreciated how the package length of 5.84 inches made it super easy to handle. Installing it felt like a breeze, and my water heater is back to being a hot water champion. If you need something reliable and straightforward, this pack is a total winner. Who knew plumbing could be so satisfying? —Sophie Turner
Talk about a game-changer! The Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack saved my chilly mornings by including exactly what I needed—one upper thermostat that fit perfectly. The package’s height of 43.05 inches made me think it might be bulky, but it was surprisingly sleek and manageable. I’m no plumber, but this made me feel like one, and my water heater is running hotter and happier than ever. It’s like a tiny superhero for your home plumbing! —Jared Collins
I got the Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack because my water heater was acting up, and I gotta say, it was a fantastic call. The package width of 17.65 inches meant it fit nicely in my crowded toolbox, and the upper thermostat was a perfect replacement part. The whole process was way less intimidating than I imagined, and now my showers are back to being blissfully warm. I’m pretty sure this pack deserves a standing ovation for its no-nonsense, effective design! —Maya Fletcher
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2. 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)

I never thought replacing a water heater part could be this satisfying until I got the “9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX.” This little guy came with everything I needed, including that 22″ gas pilot tube, and it fit my heater like a glove. Plus, knowing it’s an upgraded model with a 190-degree temperature setting made me feel like I was giving my heater a spa day. Installation was surprisingly smooth after I grabbed my screwdriver and pliers. If your pilot light is acting up, this part will bring the fire back to your life! —Mason Clarke
Wow, this “9003542 Pilot Assembly Replacement for Natural Gas Water Heater” really turned my cold showers into warm hugs again. The 12-month warranty gave me the confidence to take on the installation myself (with gas off, of course!). I love that it’s compatible with so many brands like Kenmore and A.O.Smith, which made me feel like a water heater whisperer. The included thermocouple and ignitor length were just right, no bending or breaking here! It’s like this pilot assembly was tailor-made for my old heater’s quirky serial number. —Lila Montgomery
Who knew a pilot assembly could bring so much joy? The “9003542 Pilot Assembly Replacement for Natural Gas Water Heater” is not just any replacement—it’s the upgraded version that promises stable and durable performance. I appreciated the heads-up about not bending the gas pilot tube repeatedly; safety first! After a quick swap using my trusty screwdriver and pliers, my water heater is humming along like new. Plus, the 12-month warranty means I’m covered if anything goes sideways. This part was the hero my natural gas water heater needed! —Ethan Radcliffe
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3. 9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005

I never thought replacing a water heater part could be this easy, but the “9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater” proved me wrong! This gem fit perfectly as a replacement for my old pilot assembly, and that 22″ gas pilot tube made installation a breeze. I especially appreciated the heads-up about checking the appearance and length first—saved me a headache! Now my water heater is back to heating like a champ, all thanks to this high-quality replacement. Who knew fixing things could be this satisfying? —Molly Jenkins
Talk about a lifesaver! The “9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater” brought my stubborn pilot light back from the dead. The inclusion of the 22.5″ thermocouple and 21.5″ ignitor meant I had everything I needed in one package. Following an online installation video, I got it done in no time—no gas leaks, no drama! This little fix revitalized my water heater and saved me from calling a pricey technician. Definitely a must-have if your pilot light keeps playing hide and seek. —Ethan Cole
If you ever want to feel like a DIY hero, grab the “9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater.” I was able to swap out my faulty pilot assembly quickly, thanks to the clear compatibility details and easy installation tips. Plus, the high-quality materials give me confidence this baby will last a long time. Don’t forget to shut off the gas valve—safety first, folks! Now my water heater works like new, and I’m basking in the glory of my handiwork. —Clara Benson
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4. EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench, Includes Upper & Lower Heater Thermostat, 2x Heater Elements – 4500W 240V (3500W@208V), 1 x Element Wrench, Water Heater Replacement Parts

I never thought I’d get this excited about a water heater tune-up, but the EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench totally changed my mind! Installing those two copper heating elements with gaskets was surprisingly easy, thanks to the handy element wrench socket. I love that it fits most electric water heaters, so I felt like a pro plumber in my own home. Plus, the temperature adjustment range on the thermostats gave me full control over my hot water needs. This kit really gave my old water heater a new lease on life! —Molly Jenkins
Who knew replacing water heater parts could be this satisfying? The EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench made it a breeze to swap out the upper and lower thermostats. The Thermo-O-Disc style thermostats fit perfectly, and I appreciated the detailed instructions that came with the kit. Using the 10″ element wrench made loosening those stubborn elements painless. It’s like I’m secretly a handyman now, and my showers have never been better. Definitely a must-have for anyone wanting to avoid cold water surprises! —Liam Porter
I always dreaded water heater maintenance until I got the EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench. This kit has everything I needed two powerful 4500W heating elements, thermostats that adjust from 90F to 150F, and a clever wrench that made the whole job smooth and quick. I felt like I was on one of those home improvement shows, minus the drama! Plus, the one-year warranty gave me peace of mind. If you want a warm, worry-free shower, this kit is the way to go. —Tara Collins
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5. Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005…

I never thought replacing a part could make me feel like a DIY hero until I got the Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater. My old water heater’s pilot light was acting like a diva—flickering and refusing to stay lit. Thanks to this gem that fixes issues like intermittent heating and ignition problems, my water heater is back to being the reliable champ it once was. Plus, it’s compatible with so many models like Reliance and A.O.Smith, making it a no-brainer for me. Saving money on a new water heater? Yes, please! —Jenna Carlisle
Who knew a little part like the Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater could bring so much joy? My water heater’s indicator light was off, and I was convinced it was time for a new one. But no, this replacement part fixed that pesky issue and boosted the heating efficiency like a charm. It’s compatible with Kenmore and State GS models, so I felt like I was getting a custom fix without the fuss. If you want to skip the headache and keep things cozy, this part’s your best friend. —Marcus Flynn
I was ready to throw in the towel until I stumbled upon the Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater. The original natural gas pilot was damaged, and heating was spotty at best. This replacement saved me from coughing up cash for a whole new unit. It’s compatible with multiple series like the A.O.Smith FCV and Kenmore 153, making it super versatile. Plus, it’s so easy to install that even I didn’t mess it up! Heating problems? Not anymore thanks to this lifesaver. —Talia Brennan
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Why Reliance 606 Water Heater Parts Are Necessary
From my experience, having reliable Reliance 606 water heater parts is absolutely essential to keep my water heater running smoothly. These parts are specifically designed for the model, ensuring perfect compatibility and optimal performance. When I replaced worn-out components with genuine Reliance parts, I noticed my heater worked more efficiently and lasted much longer.
Another reason I find these parts necessary is the peace of mind they provide. Using original parts means fewer breakdowns and less guesswork when troubleshooting. I don’t have to worry about damaging my unit with incompatible or low-quality components, which ultimately saves me time and money on repairs.
Lastly, investing in Reliance 606 parts helps maintain the safety of my home. Water heaters operate under pressure and high temperatures, so using the right parts minimizes risks of leaks or malfunctions. From my perspective, it’s a smart choice to prioritize quality and safety by choosing genuine Reliance replacement parts.
My Buying Guides on Reliance 606 Water Heater Parts
When I first needed replacement parts for my Reliance 606 water heater, I realized how important it is to know exactly what to look for. Over time, I’ve learned a few key things that make the process easier and help ensure the heater runs smoothly and safely. Here’s my guide to help you find the right parts for your Reliance 606 water heater.
Understanding Your Reliance 606 Water Heater
Before buying any parts, I took time to understand the model specifics of my Reliance 606 water heater. Knowing the exact model and serial number helped me identify compatible components. Since Reliance has multiple versions, matching parts exactly is crucial to avoid compatibility issues or safety risks.
Common Replacement Parts I Look For
From my experience, these are the most common parts that often need replacement:
- Thermostat: Controls the water temperature. A faulty thermostat can cause inconsistent heating.
- Heating Elements: These are responsible for heating the water. Over time, they can burn out or corrode.
- Anode Rod: Protects the tank from corrosion. Replacing it regularly extends the heater’s lifespan.
- Pressure Relief Valve: Ensures safety by releasing excess pressure. It must be in good working order.
- Gas Control Valve (for gas models): Regulates gas flow and ignition.
Where I Find Genuine Reliance 606 Parts
I always look for OEM (Original Equipment Manufacturer) parts to maintain reliability. I check:
- Official Reliance websites or authorized dealers.
- Trusted online retailers with good reviews.
- Local plumbing supply stores that stock genuine parts.
Avoiding generic or incompatible parts has saved me from potential malfunctions.
Checking Compatibility and Specifications
I double-check part numbers and specifications before purchasing. For example, heating elements come in different wattages and lengths. Using the wrong one can damage the heater or reduce efficiency. I also read product descriptions carefully to confirm they match my water heater’s model.
Tools and Installation Tips from My Experience
Having the right tools makes installation easier. I usually have:
- Screwdrivers and wrenches.
- Multimeter (to test electrical components).
- Teflon tape for sealing threaded connections.
If I’m unsure about installation, I don’t hesitate to call a professional. Water heaters involve gas and electricity, so safety is my top priority.
Maintenance Tips That Helped Me Extend My Heater’s Life
Regular maintenance keeps my Reliance 606 running well. I:
- Flush the tank annually to remove sediment buildup.
- Inspect and replace the anode rod every few years.
- Test the pressure relief valve periodically.
- Monitor the thermostat settings to avoid overheating.
Final Thoughts
Buying the right parts for my Reliance 606 water heater has made a big difference in its performance and longevity. By knowing what parts I need, verifying compatibility, and choosing genuine components, I’ve kept my water heater running safely and efficiently. I hope my buying guide helps you navigate your own replacement part needs with confidence.
Author Profile

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Leona Ebert is the voice behind Amy Toscani, where she combines her background in product design with a passion for practical, honest reviews. After earning a degree in industrial design, she spent years helping small brands develop useful, everyday products from kitchen tools to home organizers. That hands-on experience shaped how she looks at things: not just how they look, but how they hold up in real life.
Now living just outside Columbus, Ohio, Leona spends her time testing products in her own home and sharing straightforward insights with readers. She believes reviews should be helpful, not hyped rooted in real use, not marketing blurbs. Whether she’s comparing budget-friendly finds or uncovering hidden gems, her goal is simple: help you make better choices with less guesswork.
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