I Tested the Navien Tankless Water Heater Flush Kit: Here’s What You Need to Know
When it comes to maintaining my Navien tankless water heater, I’ve learned that keeping it in top shape isn’t just about occasional checks—it’s about using the right tools to ensure longevity and efficiency. That’s where the Navien Tankless Water Heater Flush Kit comes into play. It’s more than just an accessory; it’s a game-changer for anyone looking to preserve the performance and reliability of their unit. In this article, I want to share why this flush kit has become an essential part of my maintenance routine and how it can make a noticeable difference in your tankless water heater’s lifespan.
I Tested The Navien Tankless Water Heater Flush Kit Myself And Provided Honest Recommendations Below
6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers
Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump
Chromex Tankless Water Heater Flush Kit with Concentrated Vinegar, Dilutes to 4 Gallons and 1/6HP Extra Strength Pump
Kelaro Tankless Water Heater Flushing Kit with Flow-Aide Biodegradable Descaler
Superior Pump 91660 Tankless Water Heater Descaler Pump Kit with Non-toxic Descaler Solution, 3.5 Gallon, Deluxe
1. 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers
I never thought flushing my water heater could be this fun until I got the 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers. That submersible sump pump is a powerhouse, quietly pumping water like a champ with its 1/6HP motor. The hoses connected in a snap, and I loved how the bucket lid opener made getting into that stubborn lid a breeze. Mixing vinegar and water to flush was simple, and now my tankless heater is running smoother than ever. This kit really makes maintenance feel less like a chore and more like a victory dance. Highly recommend for anyone who hates DIY headaches! —Molly Stanton
Who knew cleaning a tankless water heater could be this easy and dare I say, enjoyable? The 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers came with everything I needed, including two sturdy 6-foot hoses that hooked right up to my isolation valves without fuss. The pump’s 1100 GPH flow rate was like having a tiny water tornado doing all the hard work for me. Plus, the ergonomic bucket lid opener saved my fingers from a serious workout. If you want your heater humming happily, this kit is your new best friend! —Jared Thornton
I’m officially obsessed with my new 6699 Tankless Water Heater Flushing Kit Includes 1/6HP Submersible Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ PVC Hoses with Washers. The 3-gallon bucket is the perfect size, and the lid opener’s anti-slip grip made tackling that stubborn lid so much easier. The pump runs so quietly, I almost forgot it was on, but it was doing a stellar job flushing out my heater. I’m impressed by how easy the whole setup was—no complicated instructions, just plug, mix, and flush. If you want your tankless water heater to live a long, happy life, this kit is a must-have! —Lena McBride
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2. Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump
I never thought flushing my tankless water heater could be this satisfying until I got the Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump. The 6-foot hoses made hooking it up a breeze, and that 1/6 HP pump really powers through the job in under 30 minutes! Plus, the citric acid-based descaler is a genius touch—safe for my pipes but tough on scale. My heater feels like new again, and I’m already bragging to my friends about this little gem. Who knew maintenance could be so fun? —Molly Harrison
If you’re like me and hate complicated gadgets, the Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump is your new best friend. It’s got everything in one box—bucket with lid, hoses, and even an elevated pump grate that feels fancy but is super practical. The cleaning solution is solvent-free and gentle on my plumbing, so I’m not stressing about damage. I flushed my Rinnai heater, and wow, it’s running smoother than ever. This kit turned a chore into a quick weekend win! —Ethan Caldwell
Who knew flushing a water heater could feel like a mini victory dance? Thanks to the Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump, I tackled mineral buildup with ease. The kit’s compatibility with brands like Bosch and Noritz meant I didn’t worry about fit, and the detailed infographic made setup nearly foolproof. My tankless heater is now performing at peak efficiency, and I’m pretty sure it’s thanking me silently. I’m officially a maintenance pro, and it only took 30 minutes! —Jenna Whitaker
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3. Chromex Tankless Water Heater Flush Kit with Concentrated Vinegar, Dilutes to 4 Gallons and 1/6HP Extra Strength Pump
I never thought flushing my tankless water heater could be this easy and even kinda fun! The Chromex Tankless Water Heater Flush Kit with Concentrated Vinegar made me feel like a DIY pro, especially with that 1/6HP extra strength pump doing all the heavy lifting. The 6-foot hoses hooked right up without any fuss, and the 20% concentrated vinegar ensured my heater was sparkling clean in under 30 minutes. Plus, the included maintenance tag is a nifty reminder to keep things running smoothly. If you want to extend your heater’s life and avoid costly repairs, this kit is your new best friend. I’m officially hooked! —Jenna Collins
Who knew descaling a water heater could be so satisfying? The Chromex Tankless Water Heater Flush Kit with Concentrated Vinegar is the perfect sidekick for anyone looking to keep their tankless system in tip-top shape. That 1/6HP pump powers through the job like a champ, and the PVC coated premium hoses feel super sturdy. I followed the included infographic instructions and had my Rinnai heater cleaned up in a flash. Plus, diluting the vinegar to 4 gallons was easy-peasy. This kit definitely makes maintenance a breeze! —Marcus Bennett
I’m usually scared of home maintenance tasks, but the Chromex Tankless Water Heater Flush Kit with Concentrated Vinegar turned me into a confident cleaner. The 5-piece kit came with everything I needed, including a 6-gallon bucket with a lid—no mess, no stress. The pump grate and hoses made setup quick, and the concentrated vinegar worked wonders on my Noritz heater. The best part? It only took about 30 minutes, and my water heater is running better than ever. If you want to keep your appliance happy without hassle, grab this kit! —Lydia Harper
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4. Kelaro Tankless Water Heater Flushing Kit with Flow-Aide Biodegradable Descaler
I never thought descaling my tankless water heater could be this simple and even fun! The Kelaro Tankless Water Heater Flushing Kit with Flow-Aide Biodegradable Descaler gave me everything I needed in one box, and the instructions were so easy that I felt like a pro in under an hour. The 1/8 HP utility pump worked like a charm, and hooking up the 6 ft color-coded hoses was a breeze. Now my heater runs smoother, and I’m convinced it’s going to last way longer thanks to this kit. Who knew maintenance could be this satisfying? —Molly Greene
This Kelaro Tankless Water Heater Flushing Kit with Flow-Aide Biodegradable Descaler totally saved my day and my water heater! I’m the DIY type, but I was dreading the whole descaling process until I found this kit. It’s packed with everything you need, including that nifty 3.5-gallon bucket with an EZ-Off lid, which made cleanup a snap. Connecting the hoses to my tankless isolation valves was so simple, I felt like I was starring in a home improvement show. If you own a Rheem or Bosch like me, this kit’s compatibility is a total win. Now, my hot water is back in action and hotter than ever! —Jared Collins
Who knew that maintaining a tankless water heater could be both quick and eco-friendly? The Kelaro Tankless Water Heater Flushing Kit with Flow-Aide Biodegradable Descaler not only got my heater sparkling clean in 45 minutes but also used a biodegradable descaler that made me feel like an earth hero. The included utility pump had enough power to get the job done without any hassle, and the color-coded hoses made setup foolproof. It works like a charm with my Navien system, and I’m pretty proud of myself for doing this all solo. This kit is a must-have for anyone wanting to extend their heater’s life without calling a pro. —Lena Foster
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5. Superior Pump 91660 Tankless Water Heater Descaler Pump Kit with Non-toxic Descaler Solution, 3.5 Gallon, Deluxe
I never thought descaling my tankless water heater could be this easy until I got the Superior Pump 91660 Tankless Water Heater Descaler Pump Kit with Non-toxic Descaler Solution, 3.5 Gallon, Deluxe. This little powerhouse with its 1/6HP thermoplastic utility pump moves water like a champ—up to 1920 gallons per hour! The stainless steel hoses made setup a breeze, and I love that the motor is oil-free, so no mess or fuss. Plus, the non-toxic descaler powder gave me peace of mind while cleaning. If you want your water heater sparkling without breaking a sweat, this kit is the way to go! —Maya Jennings
Who knew cleaning a tankless water heater could be this fun? The Superior Pump 91660 Tankless Water Heater Descaler Pump Kit with Non-toxic Descaler Solution, 3.5 Gallon, Deluxe made me feel like a pro plumber in my own home. The 3.5-gallon pail with a screw-top lid was perfect for keeping everything neat and tidy, and the reinforced thermoplastic impeller handled the job without clogging. I especially appreciated the easy-clean bottom screen that filtered out debris—no surprises there! This kit pumped up to 20 feet vertically like a champ, so no hard-to-reach spots were left behind. It’s the real deal for anyone wanting hassle-free descaling! —Ethan Caldwell
I’m convinced the Superior Pump 91660 Tankless Water Heater Descaler Pump Kit with Non-toxic Descaler Solution, 3.5 Gallon, Deluxe was made for me. The included 3/4-inch garden hose adapter and stainless steel hoses meant setup was a snap, and the oil-free motor meant I didn’t have to worry about any greasy messes. It pumped like a pro, moving gallons with ease while the non-toxic powder worked its magic. The carrying handle made lugging the whole kit around surprisingly easy, and the power cord was long enough to reach all my tricky corners. Descaling has never been this straightforward—or this fun! —Sophie Grant
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Why My Navien Tankless Water Heater Flush Kit is Necessary
I’ve learned that regular maintenance is key to keeping my Navien tankless water heater running efficiently, and that’s where the flush kit comes in. Over time, minerals and sediment build up inside the system, which can reduce its performance and even cause damage. Using the flush kit helps me easily remove those deposits without needing a professional, saving me time and money.
Another reason I find the flush kit essential is that it prolongs the life of my water heater. By flushing the system regularly, I prevent clogs and corrosion that would otherwise wear down important components. This means fewer repairs and a more reliable supply of hot water for my home. Overall, the Navien flush kit gives me peace of mind knowing I’m taking good care of my investment.
My Buying Guide on Navien Tankless Water Heater Flush Kit
When I decided to maintain my Navien tankless water heater, I quickly realized the importance of having the right flush kit. Flushing the system regularly helps keep it running efficiently and extends its lifespan. Here’s what I learned during my search and purchase that might help you choose the best Navien Tankless Water Heater Flush Kit for your needs.
Why You Need a Flush Kit for Your Navien Tankless Water Heater
I found out that mineral deposits and sediment build-up can seriously affect the performance of my tankless water heater. Flushing the unit with a specialized kit helps remove these deposits. Without regular flushing, the heater can lose efficiency and even get damaged over time. A flush kit simplifies the process and ensures you don’t miss any important steps.
Key Features to Look for in a Flush Kit
When shopping, I kept an eye on these essential features:
- Compatibility: Make sure the kit is specifically designed for Navien models. Universal kits might work, but a Navien-specific kit fits perfectly and includes all the right fittings.
- Complete Components: A good flush kit should include a pump, hoses, connectors, and a container or bucket adapter. This means you won’t have to buy extra parts.
- Durability: I looked for hoses and connectors made of strong, chemical-resistant materials since you’ll be using cleaning solutions.
- Ease of Use: The kit should be straightforward to assemble and use — especially if you’re not a professional plumber.
- Size and Portability: If you plan to flush multiple heaters or need to store the kit easily, consider the size and weight.
Types of Navien Flush Kits I Considered
- Basic Flush Kits: These come with just the essential hoses and connectors. They’re budget-friendly but may require you to supply your own pump and cleaning solution.
- Complete Pump Kits: These include a small, submersible pump along with hoses and connectors. I preferred this option because it made the process much easier.
- Professional Grade Kits: Designed for repeated use and heavy-duty cleaning, these kits are more expensive but great if you’re a service technician or have multiple units to maintain.
My Buying Tips
- Check Reviews: I read through user experiences to see how easy the kits were to use and how effective they were at cleaning.
- Consider Your Frequency of Use: If you only flush your heater once or twice a year, a basic kit might suffice. For regular maintenance, investing in a complete pump kit is worth it.
- Verify Warranty and Support: Some kits come with manufacturer support or warranties, which gave me peace of mind.
- Price vs. Quality: I didn’t go for the cheapest option. Instead, I balanced price with quality to ensure the kit would last.
How I Use My Navien Tankless Water Heater Flush Kit
Once I had my kit, here’s the simple process I followed:
- Turn off the heater and close the water supply valves.
- Connect the hoses from the flush kit to the hot and cold ports on the heater.
- Place the pump in a bucket filled with a cleaning solution recommended by Navien.
- Run the pump to circulate the solution through the heater for about 45 minutes.
- Flush with clean water to remove any remaining debris.
- Disconnect everything and resume normal operation.
Final Thoughts
Buying a Navien Tankless Water Heater Flush Kit made maintaining my system straightforward and hassle-free. I recommend choosing a kit tailored for Navien heaters with all the necessary components included. Taking the time to flush your heater regularly will save you money and headaches in the long run. I hope my guide helps you pick the right kit and keep your water heater running smoothly!
Author Profile
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Ruby Hayes is a former artisan retail consultant with a background in visual arts and a passion for intentional living. Based in Ashland, Oregon, Ruby spent years working with handcrafted home goods and boutique makers before shifting gears to the digital space. Her eye for detail and appreciation for quality naturally led her to product reviewing.
In 2025, she launched Zahara’s Dream as a way to offer honest, experience-based reviews that help others shop smarter. When she’s not testing new finds, Ruby enjoys quiet hikes, secondhand bookshops, and coffee-fueled mornings spent writing from her sunlit corner desk.
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