How to do the descaling on a tankless water heater.

This is one of my top 5 questions I get either by e mail or comment. There is a lot of videos out there showing you how to do this and most of them have never picked up a wrench or even tried to install a unit.
We have been doing this exact procedure for over 15 years and it has been a proven success for us. The only thing we have changed is the descaling a Navien unit.
If you follow this video, you will have complete success on maintaining your tankless heater.
There are many different flush kits on the market and there all good, I have been using Flow Aid for many years and it has worked very well for us. You can use distilled white vinegar as long as you use a pump rated for tankless heaters not something you buy from Harbor Freight.
Flow Air complete kit$154.00
If you have a question, please e mail me at,
[e-mail]
I hope you enjoy this video,
Mike

[@btrent9244]

Excellent in service. Thank you very much.

[@jefftreadway8412]

Hi Mike

[@pjlopez5475]

thank you for sharing your wealth of knowledge and expertise in the tankless units. from Bushwick to Boston, Peejay thanks you!!!

[@bobbycheetah3455]

Of all my research, I have yet to find an official descaler kit that has a proper pump in it. They all have GPH ratings that are WAY to high. So I did go to Harbor Freight and found a 264 GPH (4.4 GPM) pond pump. I realize that flushing at 20,25,30 GPM is too fast for the solution to "work", but if you run it for a longer time is it ok to do? Or, will running at high GPM actually cause damage to the tankless?

[@judegonzales2231]

Thank You.

[@anthowinebradford2978]

My question is do you need an expansion tank with the tankless

[@anthowinebradford2978]

I love your content I watch watch mostly all them but I have a question

[@jonathanwoo6597]

Thanks for the video. I have seven Rinnai's in a parallel setup. It's time consuming to flush all seven of them. I was thinking of building a custom hose so I could flush all of them at once. But I need to figure out how to check for the flow coming out of each one. Sometimes the water inlet valve doesn't open (I have a master unit which keeps the valves off by default, I think). Do you have any suggestions on how to do all seven efficiently and fast?

[@joebal9044]

I would do 1 thing differently. I would clean the filters AFTER descaling. Dirt in your bucket and/or deposits dislodged during descaling could clog the filter

[@MicahWard-ir5th]

Do you have a video of going from natural gas to propane on a RL series? RL94e is what I have to be exact.

[@jw4849]

How often should you do this if you have always had a water softener?

[@Nazaba09]

I have an error and can’t find what it means
E-430
Is it in one of your videos?