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Old 01-13-2019, 02:02 PM   #1
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Sanicon Question?

Read a post on facebook where a guy said to never leave your sanicon hooked up all the time. We are at a CG for a month and my DW likes to wash clothes a lot. I have always just left the grey open. Am I doing something wrong or did I not read his post correctly? Thanks

Bill and Alice
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2008 Phaeton (sold) ; 2017 Newmar 4037; 2019 Dutch Star 4369(last one)
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Old 01-13-2019, 02:04 PM   #2
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I leave mine connected all the time with gray open. Any other way would be inconvenient


NHSO (Newmar Hoot, Sevierville Original), Kindness Matters
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Old 01-13-2019, 02:19 PM   #3
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I added a sanicon and itís hooked up with the gray open all the time. Thatís SOP for us.
Thom and Diane Boles
2010 Winnebago Vista 32K **2013 Mini Cooper S Roadster ** 2010 Triumph Tiger 1050 at home...
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Old 01-13-2019, 02:31 PM   #4
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The idea behind not having the gray tank valve open is when you dump, you do the black tank first and then the gray to wash out the crud. If you use your washer, then it would be better to leave the gray open and the water will flow through the bypass of the Sani-Con.

Having said that, if you have Black Tank Rinse and use it then it wouldn't matter, you can leave your Gray tank open.
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Old 01-13-2019, 04:08 PM   #5
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There are RV parks were there are sewer flies that can enter your coach if leaving either tank valve open all the time. Over time grease, hair and other things that are in our sink and drains that will settle on the floor of either tank that will built up because they aren't go down your sewer hose. Yes it's easier to leave the grey tank valve open but would recommend because of the above mentioned issues you don't. I have gone to many seminars on tanks have always been shared it's not recommended. No sewer flies or sewer gas for our Newmar.
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Old 01-13-2019, 04:18 PM   #6
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I used to do that also but don't anymore. If we are going to run the washer or dishwasher or take the long hot shower I dump the grey beforehand. I was told that leaving the grey open can have a negative outcome in that grease or solids if you aren't careful that go into the grey tank can sit and harden. Now whether that is true or not I don't know. It kinda makes sense to me so I don't leave it open anymore. I just monitor it daily. I wished I had one of those electric valves to open the grey from the inside somedays. I can't see putting one on my black tank as I always rinse/flush the tank after dumping.
Rick and Jenn and Lizzie our GSD
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Old 01-13-2019, 06:26 PM   #7
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If you read some posters on the open forum, they claim everything from sewer flies to alligators will climb up your drain hose and into your tank/coach. I've been RVing for 43 years, the first 30 years, I used a 3" drain hose and always left the grey valve open all the time and never had an issue. The last 13-14 years, I've been using a SaniCon macerator. I never worry about flushing the hose with grey water or even flushing it with fresh water, unless I'm parking the coach for a couple of months. That's the beauty of the SaniCon system. Dump and cap the end.

If you have the SaniCon installed, it has a grey water bypass. With the original unit, it was a small 3/8" hose that let water trickle through. It was pretty much full of water all the time, not letting anything pass up stream. I haven't torn a new SaniCon unit apart, but I'm guessing it's still tough for something to crawl or fly up it.

As redbraron73 stated, it's an inconvenience, at least for me, to not be connected with the gray valve open. I never worry about flooding or full tanks at an inopportune time.

Don & Mary
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