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Old 07-16-2018, 06:40 PM   #1
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How do you completely empty the fresh water holding tank?

Not really sure!!
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Old 07-16-2018, 06:45 PM   #2
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It is difficult if not impossible to completely drain the FW tank as there is generally at least one low point that will hold some water. You can alternate the Ft-to-Bk level to help. This is why it is important to sanitize on a regular basis. My last two TT had rigid tanks that were placed to allow access to the top of the tank. In each I cut a 8" hole and added a water tight marine deck plate. This allowed me to use a W/D shop vac to completely dry the tank. Unfortunately in most larger units this is not possible.
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Old 08-01-2018, 09:43 AM   #3
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Most trailers have a fresh water tank drain valve or drain cock. It is usually mounted on an angle to the tank so you should be able to empty the tank. I have never had a problem with winterizing.

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Old 08-01-2018, 10:17 AM   #4
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The only RV that I could completely empy any tank on was one that had access to the bottom of the tanks and I could push up on the actual tank and reverse the sag.

We always leave a little water in all our waste tanks, but it would be nice to be able to actually drain the fresh completely by using the drain valve. But, evidently it is just not meant to be.

Before we retired, when we couldn't use the RV as often, I drained the fresh tank and ran the pump until no water came out. Then I raised and lowered sides/front of the RV to get more out and left the drain valve open. 5 months later while taking the 'dry' RV to a CG, water was still pouring out the fresh drain valve while going down the road

So now I just do as mentioned earlier and sanitize the fresh tank periodically.
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Old 08-01-2018, 10:19 AM   #5
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If you open the drain at the campground, the bouncing on the way home will shake most of the water out. I usually dump most of my water into the black tank at the site to aid in flushing the tank so there is not much left to drain.
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Old 08-01-2018, 04:26 PM   #6
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I found debris blocking the dump valve and used compressed air to blow into the tank from the dump valve to knock them loose. The tank drained after that.
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Old 08-01-2018, 08:36 PM   #7
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Flip it upside down and tape its belly should get all of the water out.

I don't really worry about residual water in my tanks or lines because I'm fairly religious about sanitizing my system and adding additional bleach to my fresh water after sanitation to keep things safe.

I often drain my FW tank while driving. I remove the valve and water the road as I head back home. Its fresh and not waste water so I don't see much harm in this practice.
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