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Old 08-14-2015, 04:24 PM   #1
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Brand: Thor Motor Coach
Model: Challenger 37KT
State: Michigan
Posts: 276
THOR #2628
Gray Tank question

Just put a deposit on a 15 Challenger 37KT. It has two gray tanks, one for the bath room and another for the kitchen. Does anyone know how big each tank is?

Thanks KC
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Old 08-14-2015, 04:33 PM   #2
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Brand: Thor Motor Coach
Model: Challenger 35HT
State: Maryland
Posts: 64
THOR #1875
It should be 40 gallons per tank (grey and black). Fresh water tank is 100 gallons.
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Old 08-14-2015, 04:46 PM   #3
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Brand: Thor Motor Coach
Model: Challenger 37KT
State: Michigan
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THOR #2628
Is that 40 for each Gray tank and 40 for Black?

KC
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Old 08-14-2015, 04:50 PM   #4
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Brand: Keystone
Model: Cougar 30 RLS 5th wheel
State: Colorado
Posts: 265
THOR #2204
the info on the tanks should be in your spec sheet in the broacher from the dealer.
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Old 08-14-2015, 04:51 PM   #5
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Brand: Entegra
Model: Entegra Accolade 37TS
State: Virginia
Posts: 3,550
THOR #1469
You are correct 40 gallons per tank.

After you take delivery and the warranty is registered call Thor and ask for the waster water diagram. That diagrams will show you which fixtures are plumbed into each tank and give you an indication of how often you may need to dump.

On my 37ND for instance everything on the passenger side (shower, outdoor kitchen and washer rough in) are plumbed into the rear grey tank while the kitchen and bathroom sinks are plumbed into the front grey tank. The one toilet is the only thing plumbed into my black tank.
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Old 08-14-2015, 04:55 PM   #6
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Brand: Thor Motor Coach
Model: Challenger 37KT
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THOR #2628
Great info thanks everyone!!

KC
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