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01-07-2013, 07:06 AM
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#1
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Senior Member
Join Date: Oct 2010
Location: Warren County, NJ
Posts: 1,354
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Gray water to flush toilet ?
So I am looking into making a system (pump, valves and filter) to use our gray water to flush the toilet.
Anyone here know of anyone who made a system to do this?
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Gene & Ginger
2019 Chevy Express 3000 6.0L
2024 Grand Design Imagine 2600RB
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01-07-2013, 07:32 AM
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#2
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Senior Member
Country Coach Owners Club
Join Date: Jan 2011
Posts: 1,204
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Interesting idea, but you may have to clean the toilet more often, it will smell like gray water, and you'll need to leave some amount of gray water in the tank or put some in it for it to work. If your intent is just to save room in your gray water tank so the black water tank is close to full when the gray water is you might try washing and rinsing dishes in a tub and then dump that down the toilet, collecting the shower water that you run to get the water hot in the same tub and use it to wash the dishes. Or install a system to transfer some gray water to the black tank. Unless you do a lot of boon docking this might not be worth the effort. Also if you do a lot of boon docking you might consider a sun shower and take your showers outside. You might also consider getting one of those portable dump tanks. The more complicated you make the systems the more stuff there is to screw up and break. There are probably a bunch of unintended consequences that will be discovered after you set the system up.
Good Luck
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01-07-2013, 07:47 AM
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#3
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Moderator Emeritus
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
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I've never heard of it being done but it sounds like a GREAT idea to me!
Good luck with it.
Rick
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Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD
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01-07-2013, 09:16 AM
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#4
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Senior Member
Join Date: Nov 2007
Location: somewhere in the west
Posts: 1,168
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That is not an unknown resource in the Boondocking world but I know of no "plans" for doing so but remember that a few discussions (I know not where), recommended the source of the gray water be up off the bottom, and if bleach is in the gray water, it is not appropriate for the black tank because it kills the bacterial action going on in there which is important for boondocking, and fulltime, but not a factor for weekender's.
Ed
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01-07-2013, 09:26 AM
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#5
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Senior Member
Monaco Owners Club
Join Date: May 2012
Location: DFW, Tex-US
Posts: 6,196
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Novel idea,
would save fresh water for use elsewhere
but I wonder if there is a law against connecting black water to grey water?
(which (via piping) is connected to fresh water)
You'd have to have some valves and pumps for sure.... Have to think on this a while...
others have tried it:
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'11 Monaco Diplomat 43DFT RR10R pushed by a '14 Jeep Wrangler JKU. History.. 5'ers: 13 Redwood 38gk(junk!), 11 MVP Destiny, Open Range TT, Winn LeSharo, C's, popups, vans, tents...
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01-07-2013, 09:54 AM
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#6
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Senior Member
Join Date: Oct 2010
Location: Warren County, NJ
Posts: 1,354
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Here is my reason. We boondock (at music festivals) or have limited hookups when we camp and conserve as mush freshwater as we can. It's painful to see nice clean freshwater being used to flush the toilet. This also give a little more room in the gray tank also.
So my idea is to draw gray water from the holding tank and use a demand water pump just like the freshwater tank uses. I think a filter before the pump would be a good idea to protect the pumps and valves on the toilet from particles that are suspended in the gray water.
I would bring the feed line into the toilet room and have a series of quick connects to "unplug" the freshwater from the toilet and then connect the gray water line. I would not rely on any three way valve as a means of isolating the gray water flush line to the fresh water system.
Or I could use a three way valve and put a check valve in the freshwater line. that would be to means of a stop.
So the process begins.
Thanks for everyones input.
__________________
Gene & Ginger
2019 Chevy Express 3000 6.0L
2024 Grand Design Imagine 2600RB
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01-07-2013, 10:51 AM
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#7
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Senior Member
Newmar Owners Club Freightliner Owners Club Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,973
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I think it could be a good idea with a few assumptions.
1. We found that in our Winnebago with 51 gal black and 53 gal grey that we would have to dump the grey tank 2-3 times as often as the black. (We tested this out in our CG for future reference.)
2. If one chose to use CG toilet facilities to some extent then I would think one could make a significant increase of time between dump by channeling grey water to the black tank.
3. The big caution would be on having full fresh water and full waste tanks with the associated weight until dumping could be done. I once had full water and 1/2 black & grey tanks and exactly maxed out my rear axle on the gasser.
These thoughts assume that the reason to conserve water is more based on camping without sewer hook ups or boondocking instead of hyper water conservation beliefs.
I don't know about any sidebar issues relating to the affects on grey water on black tank odors and such. That could cause other issues.
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2006 2015 DSDP 4320 4369, FL Chassis, 2013 CR-V 2020 Jeep Overland, Blue Ox Avail, SMI AF1.
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01-07-2013, 10:52 AM
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#8
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Senior Member
Join Date: Jan 2012
Location: SW Florida
Posts: 468
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If you have 2 grey tanks and use the shower tank this would work but you don't want to use the kitchen sink tank. The grease will stink more than the black tank and clog up the valves and leave a nasty ring in the toilet along with a very bad smell.
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Bill & Linda. If it doesn't move and should, WD-40 it. If it moves and shouldn't, duct tape it. F-350 dually, 40' Sunnybrook Titan toy hauler and custom Harley
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01-07-2013, 01:10 PM
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#9
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Senior Member
Join Date: Feb 2012
Location: Small Town USA , California
Posts: 1,349
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Sounds like a good idea to me . I don't think it would all that hard to do. Like you said the biggest problem is keeping gray water particles from plugging your pump. We don't and never have put grease down our kitchen sink . Even if you had to wipe down the toilet here and there its not the end of the world and paper towels are easy to dispose of. I would come up with a system that pulls grey water from a couple inches off the floor of the grey tank and most likely you might not have clogging problems. Keep us posted .
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01-07-2013, 02:14 PM
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#10
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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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How about a rainwater collection system - use this to flush.
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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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01-07-2013, 02:18 PM
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#11
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Senior Member
Monaco Owners Club
Join Date: Dec 2011
Location: Oregon
Posts: 476
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My wife would not tolerate the smell and the extra cleaning. Maybe yours is more forgiving.
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01-07-2013, 03:34 PM
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#12
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Alberta
Posts: 1,429
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Quote:
Originally Posted by fastcat
My wife would not tolerate the smell and the extra cleaning. Maybe yours is more forgiving.
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My wife would kill me if I tried that . She's good for 2 maybe 3 nites boondocking and then back to FHU's
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Trap, Jan and the Pup
2013 Monaco Diplomat 43dft
2010 Black Jeep Liberty
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01-07-2013, 03:38 PM
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#13
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Senior Member
Join Date: Feb 2012
Location: Small Town USA , California
Posts: 1,349
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Are you telling me your grey water smells worse than what you leave in the toilet ??? There is no smell of nothing once you push the pedal and flush...At least in my Motorhome anyway .
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01-07-2013, 03:47 PM
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#14
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Member
Join Date: Dec 2012
Location: Tiverton, RI
Posts: 52
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I would think about an aquarium sand filter. Just my 2 cents.
I have seen setups like this on the net. It is a great idea.
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