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Old 11-09-2016, 09:52 PM   #1
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Galley and grey tank valves.

Good evening, I'm pretty sure this is a dumb question, but never the less, looking to leave my Galley grey tank open, right now we leave the grey tank in bathroom open to avoid continuous dumping and thinking of doing same for galley.
Is this ok to do, realizing of course if I want to clean out line after dumping black tank, I can always close galley allow to fill and have enough for a good line wash out.
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Old 11-09-2016, 10:04 PM   #2
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Shouldn't be a problem, but never leave the black open continuously. My galley usually last as long as my black so I leave it shut.
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Old 11-09-2016, 10:07 PM   #3
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In the last 10 years when parked I have never closed either when connected. I close them and open the taps running water into them while flushing black which usually takes 3/4 of an hour till it runs clean. Then open both greys to flush line. They stay open until I dump which is weekly. Have never had an issue
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Old 11-09-2016, 10:35 PM   #4
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Quote:
Originally Posted by Jeff&Karen39MB View Post
Good evening, I'm pretty sure this is a dumb question, but never the less, looking to leave my Galley grey tank open, right now we leave the grey tank in bathroom open to avoid continuous dumping and thinking of doing same for galley.
Is this ok to do, realizing of course if I want to clean out line after dumping black tank, I can always close galley allow to fill and have enough for a good line wash out.

I think what you are proposing will work just fine.

When we stay in Florida, I keep all the valves closed and dump the tanks generally every 6 to 8 days. I use an additional gate valve added externally on the drain line to equalize the galley and grey tanks. I close the external valve and open the galley and grey gate valves in the utility center. By doing this, the galley and grey tanks fill at about the same rate as the black tank. When it comes time to dump, I close the galley and grey gate valves in the utility center, open the extra exterior gate valve and open the black tank valve. After flushing the black tank 2 or 3 times, I then dump the galley and grey tanks. The whole process takes about 45 to 60 minutes.
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Old 11-09-2016, 11:15 PM   #5
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Thanks all for your quick responses, it was as I thought, just wanted to be sure.
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Old 11-10-2016, 02:35 AM   #6
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The reason I do not leave the gate valves open is I have heard stories of visitors finding their way into the tanks by more than one person. This would freak my wife out completely.
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Old 11-10-2016, 02:57 PM   #7
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I leave the greys open until the day before dumping black tank. We tend to use our washer almost daily and a couple of loads plus showers will put 20-25 gal into each tank when the outside gate valve is closed.

When I leave the greys open, I'll drop about a 2' section of hose off the support stands so that it forms a P trap to prevent "critters'
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Old 11-10-2016, 03:13 PM   #8
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I also leave a sag in my hose just to stop sewer gases, I have never had/seen/heard of anyone ever getting critters up through their hoses, I suppose it's possible, but the day it happens to me I'm rushing out to buy a lottery ticket as the odds of both are astronomical.
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Old 11-11-2016, 02:12 PM   #9
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I am another that leaves my grey valves open till the night before we depart... I too create a P trap in the hose. Close them the night before, dump the next am and you have plenty of good soapy water to clean out the sewer hose..
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Old 11-11-2016, 02:50 PM   #10
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I leave them both closed and just periodically go 'Whoosh' them
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