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Old 07-15-2012, 07:51 PM   #1
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Black/gray water questions

We recently bought a 2005 Keystone Sprinter and have parked it on the gulf. We are not traveling at this time and will remain in this spot for the year.
Question: Can the black/gray tanks be connected to the sewer and remain open until we decide to move?
We also have had problems with the venting. At times, when we first open up RV, and turn on the AC, a terrible odor will engulf the entire camper. Where is this coming from????
Thanks for the help.

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Old 07-15-2012, 08:14 PM   #2
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Hi Mike,

You can leave the gray tank open but do not leave the black tank open. If you leave the black tank open the solids will build up in the bottom of the tank and harden while the liquid will drain out. Be sure to use plenty of water when flushing the toilet. They recommend letting the black tank get to 3/4 full before dumping.

The odor you experience when you first open the unit after it being closed up is normal. We keep a dehumidifier running in ours when it isn't in use. It keeps the air a lot fresher and eliminates the odors.

Shop Dehumidifiers at Lowes.com

Good Luck,

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Old 07-15-2012, 08:15 PM   #3
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I leave my grey water open year round. BUT....you can NOT leave the balck tank open. You MUST keep it closed until its 1/2 or more full, then empty it.

You will need to use a chemical / organic odor control fluid or powder or drop in bag to keep the odors down. Ask me how I know.

If I don't, the stinkest smell comes out of the toilet every time I flush it, no matter how fast I flush.
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Old 07-16-2012, 03:41 PM   #4
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As others have said you MUST keep the black tank closed until you are ready to dump. It is a good idea (and your manual should agree) to keep all tanks closed until nearly full. This will allow any loose items to be more efficiently removed from the tank.
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Old 07-16-2012, 03:48 PM   #5
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I leave the gray tanks open and the black closed until it is ready to dump. When i dump the black tank I fill to [at least] where it was when I dumped the tank and the dump again. then I fill the toilet with water, put my chemicals in ans flush. done `til the next time.

Occasionally we leave the coach for a week or so to visit family. When we do, I put chemical into the gray tanks and fill them up. When I get back I dump them.
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Old 07-16-2012, 03:53 PM   #6
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We keep everything closed, mostly so we can use the gray water to flush out the hose after dumping the black water. Also, someone on this forum mentioned the likelihood of getting sewer flies in your gray water tanks if you left them open. I don't know if that's real or imagined or if it even matters but the image in my head is enough for me to keep them closed!
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Old 07-16-2012, 05:17 PM   #7
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You didn't say how long it has been closed up but in hot weather your drain traps can evaporate dry in a couple weeks. If they are dry and your valves are open the sewer gases and smell can come in to the coach. It will help if you put the drain stoppers in all the sinks and I set a rug over the shower drain.
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Old 07-16-2012, 07:11 PM   #8
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Black and Gray water questions

Thank you all so much for the information. This really helps.
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Old 07-17-2012, 09:39 AM   #9
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We always leave everthing open and haven't had any issues. I use raindrops in the toilet at least once a day and lots of water. When we move I make sure the black tank is nearly full of water and do a few loops around the park before using the dump station. Never had any problems with the system. Been it the same spot now for going on 3 years and no problems

Should ad every few months we shut both atill full and put lots of water in the black tank before pulling the valves. This works well for the 6 permanent people in our park even in the winter

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