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10-22-2017, 08:17 AM
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#1
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Member
Join Date: Jul 2017
Posts: 85
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Another sewer question...
Has anyone heard of using the grey tank to help sanitize the black tank after it's been emptied?
Thanks for any advice!
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10-22-2017, 08:25 AM
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#2
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Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 5,907
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Quote:
Originally Posted by chrispaula
Has anyone heard of using the grey tank to help sanitize the black tank after it's been emptied?
Thanks for any advice!
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When unhooking to leave a site, I always empty the black tank first. I then hold the sewer hose higher than the tanks and open the gray tank valve. I allow several gallons to go into the black tank. I shut off the gray valve and lower the hose. I do this several times and this cleans the black tank.
__________________
1998 Pace Arrow 35 ft. F53 Ford V10 2014 Honda CRV toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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10-22-2017, 08:34 AM
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#3
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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I have a cap for the sewer outlet. Dump the black, put on the cap, open the grey. Grey water transfers into the black tank.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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10-22-2017, 08:40 AM
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#4
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Member
Join Date: Jul 2017
Posts: 85
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Quote:
Originally Posted by ga traveler
When unhooking to leave a site, I always empty the black tank first. I then hold the sewer hose higher than the tanks and open the gray tank valve. I allow several gallons to go into the black tank. I shut off the gray valve and lower the hose. I do this several times and this cleans the black tank.
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Thank you!
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10-22-2017, 08:41 AM
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#5
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Member
Join Date: Jul 2017
Posts: 85
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Quote:
Originally Posted by vsheetz
I have a cap for the sewer outlet. Dump the black, put on the cap, open the grey. Grey water transfers into the black tank.
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Thank you!
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10-22-2017, 08:54 AM
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#6
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Senior Member
Join Date: Jun 2017
Location: Antelope Valley
Posts: 102
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I love the smell of sewage in the morning.... wait ...what?
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Meandertard or is it Muzungu?
2009 Monaco Knight 41DFT
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10-22-2017, 08:58 AM
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#7
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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Sanatize no. cause the gray tank is anything but sanitary.
And why bother sanatizing a waste (Sewage) tank.. I mean, what's the point?
I have, however heard of using it to RINSE the tank to get rid of a bit more of what does not always flow out on the initial dump
How to do it
You need a "Twist on" final valve (if your RV does not already have a 3rd dump valve)
Dump black.. Then clost the 3rd valve, open gray valve, wait a bit, close it and open dump valve. Do this a few times.. Finally open gray and dump it.
__________________
Home is where I park it!
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10-22-2017, 09:56 AM
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#8
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Registered User
Join Date: Oct 2017
Posts: 4,988
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soap packets
We full time in a fifthwheel camper and usually park for 1-2 months at a time with the sewer valves left open (I know cardinal sin). When we travel, I put 2 dish washer soap packets and 3-5 gallons of water through the toilet into the black tank and let it slosh around while driving. This has worked so far for 5+ years. I should note that we don't put any paper into the toilet, instead use a waste basket.
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10-22-2017, 10:32 AM
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#9
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Senior Member
Monaco Owners Club
Join Date: Sep 2014
Posts: 4,544
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Quote:
Originally Posted by grindstone01
...... I should note that we don't put any paper into the toilet, instead use a waste basket.
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I use regular TP and it goes in the toilet. I think I'll continue to keep the black valve closed if the cost is using a waste basket. Yuck!
__________________
1996 Tioga Class C
2007 Monaco Diplomat 40 PDQ
TOAD 2012 Cadillac SRX 4
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10-22-2017, 10:36 AM
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#10
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Senior Member
Outdoors RV Owners Club
Join Date: May 2012
Posts: 1,663
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Quote:
Originally Posted by okcnewbie
I use regular TP and it goes in the toilet. I think I'll continue to keep the black valve closed if the cost is using a waste basket. Yuck!
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YUCK is right!
__________________
2008 F450, 2016 Outdoors RV Glacier Peak 26 RKS
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10-22-2017, 10:44 AM
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#11
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Senior Member
Join Date: Jun 2017
Posts: 2,807
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Quote:
Originally Posted by vsheetz
I have a cap for the sewer outlet. Dump the black, put on the cap, open the grey. Grey water transfers into the black tank.
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Must be fun taking that cap off afterwards. 
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10-22-2017, 10:49 AM
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#12
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Senior Member
Join Date: Jul 2014
Posts: 34,343
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Quote:
Originally Posted by vsheetz
I have a cap for the sewer outlet. Dump the black, put on the cap, open the grey. Grey water transfers into the black tank.
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I would spill about a gallon of mixed black and gray doing that. The black valve is 2, 3" elbows back from the cap.
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10-22-2017, 11:53 AM
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#13
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Senior Member
Join Date: Aug 2015
Location: Phoenix, Oregon
Posts: 2,208
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Best to check the location of your tanks before trying anything, but we've used the black tank to store excess grey water while boondocking and to rinse the black while dumping for 25 years. Our previous camper had both tanks on the same level and gravity moved the liquid. Our current camper has the black tank stacked on the grey so gravity won't work, at least not in the way I would prefer. I'm planning to add a pump to move the grey liquid.
I use the twist on third valve now, but had to build in the one on the previous camper as they weren't available then. There is no spillage with that setup and you can leave the drain hose attached.
I should add that we are also TP yucckers, as horrifying as that may be, but there is a reason for it that need not be discussed here. Growing up on a farm in the '50s in WV with outdoor toilets built by the govt. in the '30s probably helps to reduce the aversion. To each his/her own.
Best of luck.
Steve
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10-22-2017, 12:25 PM
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#14
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Senior Member
Join Date: Nov 2015
Posts: 25,564
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YEP.......
Current 5vr (2007) and previous 5vr (1980) I installed a add'l dump valve on the common drain header. (Twist on wasn't avail and would hang out to far/low)
With it I can:
* open all three waste tank valves (black, grey, galley) and have increased 'Waste Holding Capacity'
* open grey/galley to increase just grey water capacity
* dump black then close and open greys to flush grey into black tank
Lots of combos/option with that add'l valve
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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