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Old 09-30-2015, 05:13 PM   #1
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National RV Owners Club
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Location: San Marcos
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Question about Bathroom sink & Sensors

Hi there... we recently bought a nice used National RV. A 1998 Tropical 6330. I'm wondering if the bathroom sink empties into the black water tank or the gray water tank.

Also, does anyone know the location of the sensors on both tanks?

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Old 09-30-2015, 05:25 PM   #2
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National RV Owners Club
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Location: FT for 6 years, NW in the summer, S in winter.
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On my 98 National Tradewinds coach, the bathroom sink empties into the Grey water tank. Rook

When you get a chance to dance, or sit this one out......I hope you DANCE!

98 National Tradewinds 7370, powered by a 3126B 300HP CAT Turbo, Freightliner XC chassis
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Old 09-30-2015, 06:33 PM   #3
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The only thing that dumps into the black water tank is the toilet. Are you talking about the sensors that indicate the water level in the tank?

Jim Anderson
1997 Tropical
Jeep Liberty
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Old 09-30-2015, 06:36 PM   #4
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My sinks empty into the gray tank, 1999 Tradewinds. The sensors on the Black tank can be seen on mine by removing the panel beside the water control valves, your tank may be in a different place. My fresh tanks are under the Co-Pilots seat accessible through the first bay on the curb side. Mine is a front entry so the clue is the decal on the outside saying fresh water drain in this bay. The gray tank on mine is under the shower and really tough to get to.
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1999 Tradewinds 7372 Cat 3126
Albuquerque, NM
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