Navien Tankless Cleaning Water Heaters Now

Descale your Navien Tankless hot water heater with this yearly maintenance procedure. Ray from Water heaters now will walk you through the steps to keep your water heater providing hot water in your home for many years.

For more information, check out some of our blog posts on tankless units:

[brettbarker]

I'm a licensed plumber in Canada, and I just have to say I have so much respect for this person. An honest plumber is hard to find nowadays, and to find one willing to help instead of gouging the customer. That's a game changer. Keep on doing what you're doing, you're doing the world a much needed service and keeping the scummy plumbers away at the same time. :)

[georgescott]

Clear and to the point with excellent camera work and audio. Whoever put this together ought to be teaching other people how to make instructional videos.

[shaneadventures]

One of the best 11min spent in my life seriously..

[camillecosta]

I did it! I did it, I did it! Watched your video about 50 times and was able to flush my tank and not blow up the house or break anything! Feeling so smart and accomplished and $200 richer! Thank you so much!❤️❤️❤️❤️❤️

[unindoji]

Given that this video is 5 years old...speaks volumes....
I couldn't just give a thumbs up and walk away. I gave a thumbs up to another video Ray did on servicing the Navien....but it wouldn't allow for comments, so I thought I'd just comment on this video since its essentially about the same topic. Ray - your videos are absolutely game changers. You explain things so well, I feel like I'm working for Water Heaters doing OTJT!
Everything you covered was so thorough, it saved me quit a bit in service fees. If you guys were local in town to the Houston area, you'd be my plumbing company of choice, hands down. Thank You for a great PhD in tankless water heater maintenance!

[PhantomGett]

I literally re-watch this video once a year when I flush out my water heater and I appreciate its existence so damn much.

[rtaj]

We just used your videos to clean my Navien for the first time. I was intimidated, but we got it done. Thank you for providing such clear and directive instructions in your videos, and for saving me almost $500!

[calebmckissick]

Best tankless service video I've seen on the web, HANDS DOWN, and I'm a licensed plumber. Nice work!

[ellenfarrell]

You are the BEST!!! I wish I had had your company install my heat and hot water system. The company I used has ripped me off royally. Thanks to your video, I just got my heat and hot water running by myself in the middle of winter on a holiday weekend. The company said they couldn't come until tomorrow with temperatures going down to the teens overnight. I just saved over $600 dollars! It is SO nice to see a company that cares about their costumers and don't rip them off! It is so rare these days.

[nmutz]

Did my first flush today and am so grateful I had this video. Thank you for making such a high quality, detailed video. Fantastic job!

[elizabethwatt]

This gentleman has provided a fantastic ‘how-to’ video. Every step is performed perfectly in order. There are other videos out there, but this is the best. Take notes or watch this video on your iPad and do as he does, pausing the video as needed. You can’t go wrong. Each step is explained at the proper time in the proper sequence. No cover is replaced or power switch turned on, until it’s time.
It is my favourite ‘how-to’ for flushing my Navien water-heater.

[JimVence]

I've self-serviced my Navien these past four years, based on this well-done explanation of the maintenance procedure. Thanks!

[paulr.williams]

Great video - thank you! I would like to add a couple of critical additional pointers that were omitted from your tutorial:

1) If there are multiple units running in Cascade mode, before flushing, you MUST FIRST take them out of Cascade mode, by doing the following (If you do not do this, the Cold Water service inlet will not allow water into the unit and your pump will be dead-ended):

- Turn on all water heaters using the Power button.
- On the master water heater, press and hold the Diagnostic and Reset buttons for more than 5 seconds. The water heaters will revert to independent operation. Then, turn the units off and they will be ready for flushing.
- After flushing and maintenance are complete, turn on all water heaters using the Power button.
- To reinstate Cascade mode:
A. On the unit you intend to be the Master water heater ( I rotate mine every year), press and hold the Diagnostic and Up(+) buttons for more than 5 seconds. “MA.00” will appear on the display to confirm that this water heater is set as the master.
B. On the slave water heater, press and hold the Diagnostic and Down(-) buttons for more than 2 seconds. “SL.01” will appear on the display to confirm that this water heater is set as a slave.
C. Repeat step 2 to configure the rest of the slave water heaters in the system, i.e., "SL.02"...
D. On the master water heater, press and hold the Diagnostic and Up(+) buttons for more than 5 seconds. All the display screens on the configured water heaters will return to the temperature display.

2) If you are using External Recirculation, don't forget to clean that Recirculation Inlet filter in addition to the Cold Water Inlet filter (they are exactly the same filters).

3) After draining and before flushing, DO NOT FORGET to move the lever on the Safety Relief Valve back down to its normal operating position! I learned this mistake the hard way, after I had pumped 5 gallons of vinegar into the drain because the safety valve was still open!! DUH LOL!!

[RArmadill]

Performing my first flush. This video was immensely helpful. Maybe it's been updated, but I found I did NOT have to unscrew the vent pipe to get the top filter out. Just the screw holding it in, and it popped right out! Good Stuff!

[michellehoyt]

You have explained this so thoroughly. This was extremely easy to accomplish for this stay at home mom on a budget!! Thank you!!

[dougtapper]

Thanks so much Ray. This is my second year flushing my Navies heater following your instructions. I appreciate the DIY video, saving me the price of a service call for something I could easily do myself.

[chrisdonze]

The instructions made it seem so much harder than how this guy explains it. Thank you so much for taking the time to do this instructional video!!!

[joonchung]

I just finished heater flushing by your instruction. I saved $200+ because of you. Thank you.

[vstar]

One of the best “how to” videos I’ve seen. And highly commendable that this company is straight up and honest. Too cool!

[NaomiM-ckyb]

So thankful for this How-to video. I was promised an initial flush from the Navien retailer I purchased from, only to get a verbal How-to, when he was doing something else. For someone who has never done this before, a verbal talk through is certainly not sufficient for me. I wish all company's held your standards! You made cleaning my water heater successful and easy. Thank you!!!