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Old 09-19-2012, 09:02 PM   #1
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Adding a grey water tank

Has anyone given any thought to adding Grey water tank above the floor? My Argosy has a 12 gallon tank below the floor. It's just a bit too small. So, I was thinking. Rather than doing a major rebuild to hold a bigger tank. I could add a tank, 10 or 12 gallons under the curb side bed. I could gravity flow the galley sink to it and have a pump connected to the original tank to transfer grey water when the original tank is full. The new tank would have it's own vent and dump valve. It would only be connected to the original tank via the pump. My thought was to use a macerater pump, since it may have to pump some solid or stringing (hair) material from the shower.
Any thoughts?
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Old 09-19-2012, 09:06 PM   #2
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Why not just run the 2 sinks to the new tank and let the shower have the original tank all to it's self. Then have a separate drain for the new tank.
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Old 09-19-2012, 09:42 PM   #3
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The two sinks are on opposite sides of the trailer. When the idea came to mind, I thought. You really don't run that much water thru the bath sink. Thus the location on the curb side for the new tank.
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Old 09-25-2012, 06:01 PM   #4
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Another thought, I read here someplace, is to route the kitchen sink to the black tank, since the grey fills faster. Doesn't give more capacity, justs shifts usage.? Also, if you do add a tank on the curb side, wouldn't the sink vent be enough, or do you have to add a vent at the new tank?
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Old 09-27-2012, 09:42 AM   #5
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I just got a rough estimate for adding a grey water tank (I don't have one).

The "Jury Rig": Replace non-working furnace under curb-side bed with tank. Add a masc. pump at low pint under shower drain, add drain line from tank to dump valve. Approx $1200

The "Right Way": Raise the axle to improve clearance and install a tank in the frame. Plumb this into the existing grey water drain @ dump valve. Approx $2000

Prices are SOCAL, from a vintage trailer shop (I had a bad experience with a generic trailer shop)

For a some extra money, you reduce the complexity, power draw, and leak opportunities. I'm still undecided.
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