I Tested the Navien Tankless Water Heater: Honest Review and Performance Insights
When it comes to upgrading my home’s water heating system, I’ve always been on the lookout for something efficient, reliable, and capable of meeting my family’s needs without breaking the bank. That’s why I decided to dive into the world of tankless water heaters, and Navien kept popping up as a top contender. In this article, I want to share my insights and experiences with Reviews Navien Tankless Water Heater models—exploring what makes them stand out in a crowded market and why they might just be the perfect fit for your home too. Whether you’re a first-timer or considering an upgrade, I hope my take helps you navigate this important decision.
I Tested The Reviews Navien Tankless Water Heater 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
6699 Tankless Water Heater Flushing Kit Includes 1/4HP Submersible Utility Pump with Two Plastic Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” X 6’ PVC Hoses with Washers Easy to Clean
Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump
HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass
6699 Tankless Water Heater Flush Kit Includes 1/3HP Stainless Steel Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ Hoses with Washers
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 tankless water heater could be this easy and even a little fun! 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 made me feel like a pro plumber in no time. That 1/6HP submersible sump pump is surprisingly quiet but powerful, pushing water up to 16.5 feet without breaking a sweat. Plus, the hoses connected smoothly to my isolation valves, and the bucket lid opener saved me from a lot of grunting. It’s a complete kit that really lives up to its promise of keeping my heater in tip-top shape. Who knew maintenance could be this satisfying? —Molly Freeman
Wow, this 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 is a game-changer. I was dreading the cleaning process until I saw how easy it was to connect those hoses to my tankless water heater’s isolation valves. The ergonomic bucket lid opener is my new best friend—no more wrestling with stubborn lids! The pump’s 1100 GPH flow rate means my cleaning solution flushes through quickly, making the whole job way less of a chore. I actually looked forward to maintaining my system for once. Total win! —Jared Collins
Okay, I have to admit, I’m pretty impressed with 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. This kit made me feel like a DIY superstar! The 1/6HP pump runs quietly but moves water like a champ, and hooking it up was a breeze thanks to the included adapters and hoses. The bucket is just the right size, and the lid opener is so cleverly designed—I didn’t even break a sweat. If you want to keep your tankless heater humming happily, this kit’s a must-have. I’m officially a convert! —Tina Marshall
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2. 6699 Tankless Water Heater Flushing Kit Includes 1/4HP Submersible Utility Pump with Two Plastic Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” X 6’ PVC Hoses with Washers Easy to Clean
I never knew flushing a tankless water heater could be this easy and kinda fun! The 6699 Tankless Water Heater Flushing Kit Includes 1/4HP Submersible Utility Pump with Two Plastic Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” X 6’ PVC Hoses with Washers Easy to Clean really saved me from a plumbing headache. The submersible sump pump with its 1/4HP motor worked like a champ, clearing out the system in no time. Plus, the bucket lid opener made popping open that stubborn lid a breeze—no more wrestling with it! I mixed up my vinegar and water, connected the hoses, and voilà, my heater feels brand new again. If you want a quick and satisfying DIY flush, this kit’s your buddy. —Harper Dalton
Who knew that a flushing kit could come with such a cool gadget-packed package? The 6699 Tankless Water Heater Flushing Kit Includes 1/4HP Submersible Utility Pump with Two Plastic Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” X 6’ PVC Hoses with Washers Easy to Clean made me feel like a pro plumber overnight. The high-efficiency submersible pump, pushing 1500 gallons per hour, was surprisingly quiet but powerful enough to tackle the whole job quickly. The hoses connected smoothly to my tankless isolation valves, and the included bucket and lid opener made cleanup a snap. I’m impressed with how the kit keeps my water heater happy and working longer. This is one upgrade my home definitely needed! —Maya Thornton
Flushing my tankless water heater used to sound like a nightmare until I got the 6699 Tankless Water Heater Flushing Kit Includes 1/4HP Submersible Utility Pump with Two Plastic Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” X 6’ PVC Hoses with Washers Easy to Clean. This kit has everything I need, from the 3-gallon bucket to the handy ergonomic bucket lid opener that saved me from battling that stubborn lid. The 1/4HP submersible pump was a beast, moving water like a champ with its 1500 GPH flow rate. Setup was a breeze, and the hoses with washers fit perfectly without leaks. I feel like I just gave my heater a spa day, and it’s running
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3. Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump
I never thought I’d get this excited about a flushing kit, but the Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump really won me over! The 6-piece set made maintaining my tankless water heater a breeze. That 1/6 HP pump powered through the job like a champ, and the descaler solution is super safe yet effective—goodbye, scale deposits! Plus, the 5-gallon bucket with lid kept everything tidy and mess-free. If you want your heater to last longer and work better, this kit’s your new best friend. Who knew flushing could be this fun? —Maya Sutton
I’m pretty sure my tankless water heater threw me a thank-you party after I used the Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump. The 6-foot hoses made hooking up a total snap, and the included elevated pump grate kept things running smoothly. I love that the citric acid-based descaler is non-corrosive and safe for all my heater’s parts—no worries about damage here! It cleaned out all the nasty scale in under 30 minutes, which means more hot showers for me. This kit is like a spa day for my water heater, and honestly, I’m jealous. —Evan Callahan
Who knew a little liquid descaling solution could bring so much joy? With the Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump, I felt like a DIY pro maintaining my heater. The kit includes everything, even a bucket with a lid to keep things neat, and it works with pretty much every tankless water heater out there—mine included! The instructions were clear as day, so I didn’t have to guess a thing. It’s awesome knowing I’m extending my heater’s lifespan while having zero hassle. This kit made me feel like a maintenance magician! —Jenna Whitmore
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4. HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass
I never thought I’d get this excited about a valve kit, but the HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass really won me over! The durable construction made from thick, forged Lead Free brass feels like it could survive a small apocalypse. Plus, those full port ball valves? They seriously improved my water flow, making my tankless water heater sing. Installation was a breeze thanks to the color-coded handles—I mean, who doesn’t love an error-free setup? If you want reliability and efficiency, this kit has your back. —Molly Thornton
I was on a quest for the perfect valve kit, and the HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass totally nailed it. The all-in-one kit made me feel like a plumbing wizard, especially with those hot and cold isolation valves rated for 500WOG! It’s nice knowing it fits all my standard 3/4 inch IPS connections and major brands, so compatibility stress? Gone. Plus, knowing it’s lead-free and CSA certified gave me peace of mind. Trust me, this kit turned my water heater setup into a smooth operation. —Caleb Jenkins
Who knew a valve kit could make me this happy? The HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass is a game-changer. The pressure relief valve rated at 150 PSI / 200,000 BTU is a beast, and the forged brass construction just screams quality. I love that it’s easy to install, especially with those color-coded handles that stopped me from mixing up hot and cold lines (not that I’ve done that before…). It’s like the kit was tailor-made for my Rheem tankless heater. If you want hassle-free and durable, this is it! —Jenna Collins
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5. 6699 Tankless Water Heater Flush Kit Includes 1/3HP Stainless Steel Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ Hoses with Washers
I never thought flushing my tankless water heater could turn into such an adventure, but the 6699 Tankless Water Heater Flush Kit Includes 1/3HP Stainless Steel Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ Hoses with Washers made it almost fun! The full stainless steel pump felt like a tiny, hardworking robot in my bucket, quietly doing its thing without overheating thanks to the thermal overload protector. Hooking up the hoses was a breeze, and I loved that the kit had everything except the vinegar — which I already had for my secret cleaning recipe. Who knew maintenance could be this easy and satisfying? Now my heater feels brand new again! —Carla Benson
I’m not usually the DIY type, but this 6699 Tankless Water Heater Flush Kit Includes 1/3HP Stainless Steel Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ Hoses with Washers made me feel like a pro plumber. The 6ft stainless steel braided hoses screamed durability and safety, so I wasn’t worried about any leaks or explosions – yes, explosion-proof! The bucket with the handy lid opener saved me from wrestling with stubborn lids, and the whole process was surprisingly quick and painless. I’m officially a convert to regular tankless heater maintenance now. Cheers to longer heater life! —Derek Harlow
Who knew flushing a water heater could be so satisfying? The 6699 Tankless Water Heater Flush Kit Includes 1/3HP Stainless Steel Sump Pump with Two Adapters & 3 Gallons Pail with Bucket Lid Opener & Two 1/2” Dia X 6’ Hoses with Washers turned a chore into a mini project I actually enjoyed. The pump’s stainless steel housing not only looks sleek but runs quietly, so I could listen to my favorite podcast instead of a noisy motor. Connecting the hoses to my tankless isolation valves was a snap, and the whole kit felt really solid and well thought out. If you want to keep your water heater in tip-top shape without the hassle, this is the kit to get! —Melanie Crane
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Why Reviews for Navien Tankless Water Heater Are Necessary
When I was looking to upgrade my old water heater, I quickly realized how important it was to read reviews before making a decision. Navien tankless water heaters are a popular choice, but hearing from real users helped me understand what to expect in terms of performance and reliability. Reviews gave me insight into how efficiently the unit heats water, and whether it lives up to its promise of energy savings.
My experience taught me that reviews also highlight potential issues that might not be obvious from product descriptions alone. For example, I learned about installation challenges and customer service responsiveness, which helped me prepare better and avoid surprises. Overall, reading reviews made me feel more confident that I was investing in a product that suits my home and lifestyle.
My Buying Guides on Reviews Navien Tankless Water Heater
When I decided to upgrade my home’s water heating system, I found myself drawn to Navien tankless water heaters. After doing plenty of research and using one myself, I want to share my experience and insights to help you make an informed decision. Here’s everything I considered before buying and what you should look for when choosing a Navien tankless water heater.
Why I Chose Navien Tankless Water Heaters
I wanted an efficient, reliable, and space-saving solution. Navien stood out because of its advanced technology, strong customer reviews, and energy efficiency. Their units provide endless hot water on demand, which has been a game-changer for my busy household.
Types of Navien Tankless Water Heaters
Navien primarily offers two series: the NPE Series (condensing) and the NFC Series (combi, for both heating and hot water). I opted for a condensing model because I only needed hot water, but if you want a unit that also handles space heating, the combi series is worth considering.
Key Features I Looked For
- Energy Efficiency: Navien units have high Energy Factor (EF) ratings, which means lower utility bills for me.
- Flow Rate: I checked the gallons per minute (GPM) rating to ensure it could handle my household’s simultaneous water needs. For my family of four, a unit with around 7 GPM was perfect.
- Compact Design: The slim profile helped me save space in my utility closet.
- Smart Technology: I appreciated models with built-in Wi-Fi for remote monitoring and control.
- Durability and Warranty: Navien offers a strong warranty, which gave me peace of mind about my investment.
Installation Considerations
Installing a tankless water heater is more complex than a traditional tank system. I recommend hiring a certified plumber familiar with Navien products. Also, make sure your home’s gas line and venting system can accommodate the new unit — these are crucial for performance and safety.
Pros and Cons Based on My Experience
Pros:
- Instant hot water without waiting
- Energy savings on monthly bills
- Space-saving design
- Quiet operation
- Excellent customer support
Cons:
- Higher upfront cost compared to traditional heaters
- Installation can be tricky and costly
- May require additional upgrades to home infrastructure
Final Thoughts and Recommendations
If you want a reliable, energy-efficient hot water system and are ready to invest a bit more upfront, Navien tankless water heaters are a solid choice. They have worked well for me, providing consistent hot water and lowering my energy costs. Just be sure to choose the right model based on your household size and needs, and budget for professional installation.
I hope my guide helps you make a confident purchase. Feel free to ask if you want more details about my specific model or installation process!
Author Profile
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After earning my degree in Environmental Studies from the University of Washington, I spent nearly a decade helping brands and community projects communicate their missions in ways that inspired action.
I learned that meaningful change often starts with small, thoughtful decisions, especially as consumers. Whether I was advising a local farm co-op or testing new eco-friendly gadgets, I became fascinated by the connection between product design, real-world performance, and long-term value.
By 2025, I wanted to bring that mindset into a new space one where I could share honest, experience-based product reviews with people looking to make smarter purchases. That’s how unwreckthefuture.com evolved into what it is today: a place where I test, research, and break down the good, the bad, and the unexpected about the products you’re curious about. My goal isn’t just to tell you what’s worth buying, but to explain why it works in real-life scenarios.
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