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Old 01-28-2017, 10:50 PM   #1
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Gray water tank capacity concern

So, our new 2017 21' Escape TT is supposed to have a 28 gallon capacity. However, today, I conducted an experiment and discovered that at 21 gallons, our shower stall started to back up.

The trailer was perfectly level both ways and was drained completely before I began my experiment.

Does anyone have any thoughts on this issue?

Signed...befuddled.
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Old 01-28-2017, 10:54 PM   #2
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Is it possible that there was still water in the tank after draining?
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Old 01-28-2017, 10:58 PM   #3
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I let it drain until there was barely a trickle.
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Old 01-28-2017, 11:01 PM   #4
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My gray tank never drains completely unless the trailer is tipped / slanted in just the right direction. I've got up to 5 additional gallons out of the gray tank by pitching the trailer after completely dumping at a dump station.
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Old 01-29-2017, 12:04 AM   #5
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My gray tank never drains completely unless the trailer is tipped / slanted in just the right direction. I've got up to 5 additional gallons out of the gray tank by pitching the trailer after completely dumping at a dump station.
Just note, Steve's trailer is a Casita, so who knows if this is relevant.
Perhaps Escape mounts the grey tank so that it slopes toward the drain. Not sure if that's the case or not.
Patio decks and sidewalks are routinely sloped to shed water. Doesn't take much slope.
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Old 01-29-2017, 12:39 AM   #6
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Escape gray tanks are known to often take a very long time draining and even then one may expect that it is not nearly drained.
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Old 01-29-2017, 12:45 AM   #7
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Originally Posted by gbaglo View Post
Just note, Steve's trailer is a Casita, so who knows if this is relevant.
Perhaps Escape mounts the grey tank so that it slopes toward the drain. Not sure if that's the case or not.


Hmmmm...interesting. Now that you mention it, we had to do a vent mod in our Casita which allowed more gray water to drain.
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Old 01-29-2017, 01:08 AM   #8
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Escape gray tanks are known to often take a very long time draining and even then one may expect that it is not nearly drained.

It took about 7 minutes to drain 21 gallons that I poured into the kitchen sink all the way down to a small trickle.
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Old 01-29-2017, 06:05 AM   #9
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Originally Posted by gbaglo View Post
Just note, Steve's trailer is a Casita, so who knows if this is relevant.
Perhaps Escape mounts the grey tank so that it slopes toward the drain. Not sure if that's the case or not.
Patio decks and sidewalks are routinely sloped to shed water. Doesn't take much slope.
While in storage (on my property), my 5.0TA is level. Also, the gray tank valve is open because I run a dehumidifier in it year round to combat humidity. So that I do not have to dump the bucket every couple of days when humidity is very high, I use the hose option and let it drain into the sink, through the grey tank, through a "sewer" cap with a hose cap, and through a hose which waters the root zone of a citrus tree outside of the carport. While in storage I occasionally jack up each side to manually rotate the tires. I can confirm that when the passenger side is jacked up, although I have not attempted to measure it, a lot of water will come out of the grey tank.
If grey tank capacity is an issue for someone camping in a given location for an extended time period, I would recommend a large blue tote tank (I believe mine is 32 gallons and is made by Barker). Although somewhat expensive, the larger ones have pneumatic tires and can be dragged with the tow vehicle to the dump station by hooking the handle over the trailer ball. I chose the 32 gallon size because it can hold the full capacity of either holding tank. I use mine sometimes at home if I fail to dump on the road; I simply drag it to the septic clean out and dump it into the septic tank. IMO, Barker Totes are of much more durable than those made by Thetford.
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Old 01-29-2017, 06:18 AM   #10
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Same on a 19'. Ours is in a garage and when I just up the passenger side to rotate the tires I can catch more water in a bucket. Sometimes several gallons.
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