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Thread: Slow Draining Gray Tank
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08-28-2022, 07:37 PM #11
My black tank has a 3 inch valve and the grays have 1.5 inch valves.
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08-28-2022, 10:30 PM #12
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I get the never ending trickle on my grays too, but I tend to let them drain completely. For me the trickle is still a fairly substantial amount of water. Few GPM at least I'd guess. I like them to be as empty as possible before hitting the road. Black too, but I put a few gallons of water back into that one before driving usually.
Matt, Irene, and Ruby (our Golden Retriever)
2022 Imagine 2600RB with ProPride 3P
2024 Silverado 2500 LTZ Gasser (3500 payload)
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09-07-2022, 05:29 PM #13
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The never ending trickle is a “feature”
I went on a factory tour of the Imagine line last week when we were at the national rally. The tanks are very shallow. The black tank has a large 3 or 4 inch opening, but the gray tanks have an opening that is more like half that. Put all that together and you end up with the never ending trickle. I’ve tried making the passenger side of trailer higher at dump station, but it doesn’t seem to make much difference - I have a slow trickle on both of my gray tanks. I’ve learned to just live with it. Doesn’t seem to do any damage - except to the patience of the guy behind me at the dump station.
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09-07-2022, 05:34 PM #14
Your expectations (based on your experience) is correct ... there really should be a good initial flow (even if it devolves into a trickle after the initial rush). I suspect there's some kind of blockage in the tank (like the floating disc Second Chance mentioned) or perhaps the gate wasn't installed quite correctly. If the pull wire has any slack at all it will seem to retract, but all you're doing is moving the wire, not the gate. I'm not familiar with your rig, but if it has coroplast the best thing would be to drag her to the dealer and let them take a look cause that' ain't right!
Pam and Doug
2017 F350 (the Dragon) with 2015 GD Ref 337RLS (the Dragon's Tail)
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09-07-2022, 05:46 PM #15
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I ran an endoscope up my rear grey tank to see if there was a blockage from a cutout and it is perfectly clear. The valves are just small on the grey tanks
Mine trickles
2021 Imagine2021 Imagine 2400 BH
2018 GMC Sierra 4x4 Crew 1840lb payload
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09-10-2022, 11:38 AM #16
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Ours are horribly slow even with the trailer nose raised. Can't get the forward tank below 2/3 on the gage (if its even close to accurate).
I am considering re-doing all the drain plumbing.Jay Leonard
New Port Richey, Fl
2022 Imagine 2600 RB, 2021 Ram 2500 CC Bighorn 6.7L Cummins
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09-10-2022, 12:25 PM #17
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09-10-2022, 02:09 PM #18
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I don’t put too much stock in the level readout. Mine reads 2/3 quite often when I know it’s empty. I sort of ignore the gages most of the time.
2021 Reflection 312 BHTS, Silverado 2500 Duramax
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09-11-2022, 09:19 AM #19
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09-11-2022, 11:53 AM #20
What changed for the new GD...
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