• Click here to access some of the presentations made during the 2022 National Rally

Descaling tankless Suburban water heater

Bozo

Prominent Member
I have not seen the instructions. I do it on home units. Need to have service valves to make it easy. Service valves allow complete isolation of the heater and hook ups for hoses to circulate cleaning agent. Are there valves on your unit? Vinegar is the cleaner. Needs to be circulated through heater Using small pump. Hopefully some one can point you to the procedure on these rv units. I am not a fan of tankless heaters in general, endless hot water, but more maintenance.
 

Tls5150

Member
I have not seen the instructions. I do it on home units. Need to have service valves to make it easy. Service valves allow complete isolation of the heater and hook ups for hoses to circulate cleaning agent. Are there valves on your unit? Vinegar is the cleaner. Needs to be circulated through heater Using small pump. Hopefully some one can point you to the procedure on these rv units. I am not a fan of tankless heaters in general, endless hot water, but more maintenance.
Thanks, I descale yearly on our house models but I don’t see valves on our Avenue. Jury is still out on tankless in the Rv but we do like them in the house
 

7ACMike

Well-known member
Just located how to access the tankless water htr! Not impressed after pulling 25 staples and 2 screws to find rear access! We have a 29RL. Definitely use screws to go back in as this is a yearly thing! Have a shop vac handy as it was full of saw dust and debris!
 

Attachments

  • 20260404_144925.jpg
    20260404_144925.jpg
    392.6 KB · Views: 4
  • 20260404_144931.jpg
    20260404_144931.jpg
    307.3 KB · Views: 4
Top