Empty glycol tank

PMoloney · February 2022

I wonder if anybody can answer this?
When winterizing, is there a valve that I may have opened or closed, that caused the glycol tank to empty?

I have a 2015 320 CS. The glycol tank is empty,( I just winterized ) and I think I remember that this also happened last year when I Winterized.
Thank you for any help.

[Deleted User] · February 2022

Hi, the glycol release is a plug and something that is more difficult to remove and is accessible from under the T@B. Its not one of the levers inside under the bed. I had a 2015 320 also and I'm trying to remember now what it looks like under there. I think the plug on mine was black. Did you pull out a plug from the underside of the T@B? See if you can find any leaks around your radiators inside. Do you have any bulges in the black hoses where it attaches to the metal radiators? Have you had the glycol switched out since you owned it? Its supposed to be changed every two years.

PMoloney · February 2022

I just checked and see no leaks near the Radiators, the black hose also look fine. I definitely didn’t remove the plug from under the tab. We’re lucky enough to live near a very knowledgeable Tab dealer and we do send it in for maintenance because we’re not terribly handy. I’m pretty sure the glycol was drained and replaced about a year ago. The Aldo bypass little toggle under the sink wouldn’t drain the glycol from the tank?

Tabaz · February 2022

As noted above, the Alde fluid drain is a brass plug in a rubber hose that extends out from the bottom of the trailer behind the driver side wheel. A spring clip over the hose holds the plug in place. Please note several owners have experienced a cracked nipple in the overflow tank (I was one of them). This would result in Alde fluid leaking directly under the tank.

PMoloney · February 2022

Thank you I will check that.

Sharon_is_SAM · February 2022

@PMoloney the Alde bypass under the CS sink is for antifreeze to bypass your Alde water tank and fill the cold and hot water lines. It is completely separate from the glycol system that runs through black hoses to heat the fins under the benches. I think I would question the dealer if you have twice found an empty glycol tank after they winterized.

BrianZ · March 2022

Could be a stuck or faulty air bleeder valve at the top of the Alde, which should normally only release air from the system, but could release glycol to the ground from the drain hose. Also, the valve is supposed to be supported to keep it horizontal, not tilted at an angle, which could cause it to stick open & release Glycol. The bench seat can push it down in some cases, and there should be a bracket to keep the hose level.

Denny16 · March 2022

Sounds like the dealer pulled the wrong plug under the trailer, and drained the Alde glycol system instead of the water drains (thinking it was part of the water low point drains).
Cheers

rcarlson1957 · March 2022

I had a problem with losing fluid recently on my 2018 T@B and it turned out to be a cracked nipple on the expansion tank. Talked with NuCamp tech at T@bazona last week and he said they carry it in stock at NuCamp. He said it happens because the stress from too tight a bend on the hose and said they put an elbow hose on it to relieve the stress. He said they keep it in stock too. I'm also getting a 45 degree elbow with a 12" manual bleeder valve extension for the opposite side in the back of the T@b. Sometimes if get too much air in system, the automatic bleeder valve can't handle it and you have to manually bleed it. The extension makes that process a little easier. Good luck!

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