How to flush/Descale Navien tankless water heater/ combi boiler NCB 240e other models - maintenance

[@tikemanski3548]

Yessir. Clear and Concise. I *always* come here first when my Navien is on the fritz. Keep em comin'

[@themillennialhomeowner1661]

Thank you! I appreciate that!

[@before7]

Ray your the best, best video on navien on the web

[@HarryGarcia-e7c]

He also took a while to tell you to run vinegar through it

[@themillennialhomeowner1661]

White vinegar chief….dangerous to not say which vinegar

[@PlanetMezz]

Can you show the filters too? I am not sure where they are or how to clean them. Also what did you add to the water flush solution? Any descaling chemical or anything??

[@sgoldste02]

Wondering why you didn't flush both the domestic hot water AND the space heating sides of the combi unit?

[@themillennialhomeowner1661]

Good question. I did once and it didn’t go so well…and then I read you’re not supposed to because it’s a closed loop system and by adding new water it adds oxygen to the existing water that is purged of oxygen and it will corrode the heat exchanger. Just what I read!

[@JohnDoe-pe6iu]

Good informative video! For a combi unit do you need to flush out both the domestic hot water and central heat exchangers? In other words do a one hour flush for each the domestic hot water and central heat? The central heat pipes are usually 1" versus the 3/4" for domestic hot water. So how is the central heat side flushed?

[@themillennialhomeowner1661]

Thanks for the feedback! From what I know you only flush the domestic side. The other side is a closed system

[@jshearman17]

@@themillennialhomeowner1661 Hey, this is the first video of yours I came across. Good job and thanks for posting. FYI, in talking to the maintenance folks from the company who installed my system, they recommend a flush of the domestic side every year and the heating side every other year.

[@Jallelab99141]

@@jshearman17 I heard the same, the closed loop system should still be flushed but not often because its closed loop and doesn't have new water running through it constantly.

[@mitsurukatayama772]

My navian is hot water is work but Heating doesn't work this year if clean up it will be work?

[@themillennialhomeowner1661]

Sounds like the heat exchanger for the heat side may need to be replaced but flushing certainly wouldn’t be a bad place to start. Never know 👍🏻

[@abc123xyz-q2p]

Do you like the Navien Combi? I had one installed several year ago, and I also pay to have it flushed every fall, but I feel it’s a money pit.

[@themillennialhomeowner1661]

After I worked the kinks out with the error codes I was getting it’s been great! It’s easy to flush, I bet they charge crazy money to do so. I have a video on my page showing how!

[@PeterBird-y4n]

I am in the UK and I have not been able to find the ball valves mentioned in this video allowing the service engineer to easily attach the water flushing pipes. Can anyone recommend a supplier. No problem to import if necessary

[@Jallelab99141]

Navien 3/4 in. Plumb Easy Valve Kit

[@ZeroColdx911]

What size are the threads for the hose?

[@themillennialhomeowner1661]

Standard washing machine hose👍🏻

[@ZeroColdx911]

@@themillennialhomeowner1661 is that 3/4” GHT garden hose?

[@alexbarok1236]

I have two hot and cold inlets and outlets - a domestic line and a heating water line. Which do I attach the circulation hoses to for descaling? Do i need to shut off all the lines?

[@dougchoate2009]

The second hot is a recirculating line, I have one too. Love it. Also close that valve when performing this maintenance

[@GarrettDunne]

Could you provide the link to purchase the pump you used?

[@themillennialhomeowner1661]

amzn.to/3u3a2It simple to use!

[@adamposas324]

Mine dosent have enough pressure coming out, how come?

[@incepimus]

The filter might be clogged

[@smfl106]

You only did one side. lol

[@themillennialhomeowner1661]

Other side is a closed loop system and new air via new cold water shouldn’t be introduced. Probably why there’s an air purge ;)

[@themillennialhomeowner1661]

Before I get beat up by the “pros” by air I mean oxygen

[@jshearman17]

@@themillennialhomeowner1661 lol, no I think you were correct when you said air. When any gas (air, O2, etc) gets in the pipes, it can mess with the flow. Then you'll need to find and open up any bleeder valves, which are usually at the highest point in a specific heating loop. On a separate note, what was the ratio of water to vinegar that you used?

[@HarryGarcia-e7c]

Does video is very he did not tell people to turn the he should have cleaned the filters he's jumping all around it's going to be confusing to people dangerous

[@themillennialhomeowner1661]

Your comment is dangerous…can’t even understand what you’re typing. Oh, and as always in my videos, I say do at your own risk 🤗

[@dougchoate2009]

I thought my 3 year old had poor communication skills, then I saw this gibberish