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Old 05-29-2018, 05:55 PM   #1
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Adding a second graywater tank

I'm going to add a second grey water tank for boondocking.
I will use a macerator pump to transfer from the current grey water tank to the secondary grey tank in the secondary tank will have its own Outlet. I've done this before in a trailer to work really well. What I need help with is where to put it on my Thor Palazzo. The best place I could find was right in the def compartment. I was thinking about getting a welded frame to set a tank on. My question to everyone is is there a good amount of heat in the def compartment because the engine is pretty close. I don't want to have my tank melt since it'll be a ABS.
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Old 05-29-2018, 08:49 PM   #2
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Def

First of all, educate me on what the def compartment is???
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Old 05-29-2018, 08:55 PM   #3
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Let gravity do the work

Why not just run a hose from the upper level of the existing tank (screw in fitting) to the new tank, wherever it is, to a lower level of the new tank and let gravity do the work instead of adding another pump system? If you use a tube down into the original tank, you could actually use a natural siphoning technique to keep both tanks equally filled.
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Old 05-29-2018, 09:11 PM   #4
gmc
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Quote:
Originally Posted by Thehobe1 View Post
First of all, educate me on what the def compartment is???
On a Diesel rig only - DEF = Diesel Exhaust Fluid - the compartment housing the tank and associated equipment.
Part of the emissions control to treat the exhaust coming from engine.
https://www.cumminsfiltration.com/si...es/MB10033.pdf
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Old 05-29-2018, 10:46 PM   #5
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BluTech

Thank You for the quick reply. Interestingly, that is the reason I went with a gasoline engine. We only use the RV once in a while and I have heard that is also a no-no for a diesal engine. And then there are the fuel injector issues...
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