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Old 10-04-2022, 06:46 AM   #1
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Unable to drain fw tank and water heater

I have a 2021 Alpine 3850 RD and unable to find the drain for the fresh water tank. In the wet bay are two low point drains, assuming just for hot and cold water lines. Looking for the FW tank drain and some way to drain the Suburban IW60 model water heater. Wondering how the original owner drained the tank and heater.





2020 alpine 3850 rd
2019 ram 3500
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Old 10-04-2022, 07:00 AM   #2
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Quote:
Originally Posted by timeforus View Post
I have a 2021 Alpine 3850 RD and unable to find the drain for the fresh water tank. In the wet bay are two low point drains, assuming just for hot and cold water lines. Looking for the FW tank drain and some way to drain the Suburban IW60 model water heater. Wondering how the original owner drained the tank and heater.





2020 alpine 3850 rd
2019 ram 3500
The freshwater tank is usually around the axels, start there and see if you can locate any drain valves underneath. Also, you may have a blue & red drain valve hanging down. These are low point drains and will help in draining the water lines in the rig.

Since this is a preowned rig, the previous owner may have cut the underbelly and pushed the valves up inside to help protect the valves from the winter/cold weather.
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Old 10-04-2022, 08:40 PM   #3
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Unable to drain fw tank and water heater

The drain for fresh tank is generally right below the tank; should be a pex drain line w/valve coming through & hanging just below the chloroplast under belly.

Sorry, no idea if the water heater is a tankless on-demand unit…
The drain for the “old fashioned” water heaters is to remove the threaded plug on the water heater tank itself, but you probably knew that. If it is a tankless unit, you should be able to download a manual on line, maybe.

Happy Trails,
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Old 10-05-2022, 02:13 PM   #4
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Thank you HAMM2018, after you said that the FW tank is usually near the axles and then further checking I found the drain. You were correct and the tank is no where near the fill valve. I called Suburban and asked about the drain for the tankless heater. They said there is a drain on the rear of the heater which would be inside the trailer, also said if I blew the lines out I should be ok. Want to thank all that helped and took the time to answer my post.
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Old 10-05-2022, 05:57 PM   #5
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Thank you HAMM2018, after you said that the FW tank is usually near the axles and then further checking I found the drain. You were correct and the tank is no where near the fill valve. I called Suburban and asked about the drain for the tankless heater. They said there is a drain on the rear of the heater which would be inside the trailer, also said if I blew the lines out I should be ok. Want to thank all that helped and took the time to answer my post.
Before you blow the lines out and stop, I would ask about the antifreeze getting in the On Demand water heater system. You can blow it out, but you may not get all the water out and it could cause damage.

Ask them about using the antifreeze to help winterize, especially if it gets really cold at your location.
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2017 Ram 3500 w/Aisin w/4:10
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