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09-08-2016, 03:54 PM
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#1
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Senior Member
Country Coach Owners Club
Join Date: Apr 2012
Posts: 353
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Newell - Single Combined Grey/Black Tank?
It's always interesting when one manufacturer does something different, clearly weighing risk vs rewards.
Newell apparently only offers combination waste/grey water tanks (sometimes with a grey water bypass switch). I would think that offers more flexibility (don't have to worry black vs grey capacities), but apparently it's a requirement of RVIA.
Do any of you have issues either way with a combined tank? Thoughts?
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09-08-2016, 09:19 PM
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#2
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Senior Member
Join Date: Jan 2015
Location: Prescott, Arizona
Posts: 3,564
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I would not want one.
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'04 Newmar MADP, 1100w of solar, Rubicon toad
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09-08-2016, 10:08 PM
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#3
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Senior Member
Join Date: Nov 2015
Posts: 26,848
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What is the difference...waste water is waste water.
Grey water can have food particles, grease-oils, skin cells, scum and even urine.
Vapor barriers stop odors from either tank coming back into rig (grey can REALLY Stink!!)
RVs of yesterdays only had one waste tank.
I added an extra valve on the common drain header and can link all three of my waste tanks together.
Great for extended boondocking
Just dump and rinse after dumping.
Besides.......
Residential drains (sinks/showers/toilets) all go into same drain system and nobody even thinks about it/questions it.
RVrs just 'hold' waste before dumping into same system
It's all waste water.
Apparently Newell at $1.9 million thinks so too
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10-22-2016, 07:11 PM
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#4
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Senior Member
Fleetwood Owners Club
Join Date: Jul 2003
Location: NY
Posts: 604
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Some of the Prevost conversions use a single waste tank.
189 Gal
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08 Diesel Bounder 38V
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04-13-2019, 04:18 PM
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#5
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Senior Member
Join Date: Mar 2000
Posts: 214
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Liberty and the defunct Legendary utilize the One Tank method. I must say to learn Newell does this is surprising.
I would never own a coach that utilized a one tank system. Eventually one would realize this system would be a hindrance instead of a benefit. It is not a modern method for storage.
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Prevost XLII by MILLENIUM
2017 AGILE SS 4x4
Toad or Trailer or both
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04-13-2019, 05:04 PM
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#6
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Senior Member
Join Date: Mar 2000
Posts: 214
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[QUOTE=phranc;3305726]Some of the Prevost conversions use a single waste tank.
The only PREVOST converter still in business that utilizes the one tank system is Liberty.
__________________
Prevost XLII by MILLENIUM
2017 AGILE SS 4x4
Toad or Trailer or both
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04-13-2019, 05:05 PM
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#7
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Senior Member
Join Date: Jul 2018
Posts: 2,812
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Foretravel has used one holding tanks for at least 10 years. Not too many places left where your can dump gray water on the ground anymore, but Newell has the right idea with the bypass, had a 95 that had a single tank with a bypass.
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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05-30-2019, 03:52 PM
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#8
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Senior Member
Join Date: May 2019
Posts: 2,392
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Our Custom Coach conversion uses a single waste tank, and after a few years I find it to be easier and to cause no problems. Unless you camp on private property, it's difficult to find sites that allow gray water to be dumped to the ground so I'm not really sure what the advantage to separate tanks is.
The waste stays liquid, so no possibility of build up in the black tank, and dumping the tank is always easy even though we only have a 2" outlet.
Every dump site we've been to has a water source, so rinsing the dump hose has never been a problem. We've never had to worry about black vs. gray capacity. Our waste tank and fresh water tank are the same size, so overfilling the waste tank is not possible as long as we're running from the tanks.
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Richard
1994 Excella 25-ft (Gertie)
1999 Suburban LS 2500 w/7.4L V8
1974 GMC 4108a - Custom Coach Land Cruiser
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05-30-2019, 04:03 PM
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#9
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Senior Member
Join Date: Oct 2018
Location: Colorado
Posts: 354
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Makes sense to me.
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06-04-2019, 01:15 PM
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#10
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Senior Member
Join Date: Sep 2018
Posts: 179
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Quote:
Originally Posted by MMouser
Liberty and the defunct Legendary utilize the One Tank method. I must say to learn Newell does this is surprising.
I would never own a coach that utilized a one tank system. Eventually one would realize this system would be a hindrance instead of a benefit. It is not a modern method for storage.
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I'm curious as to what you believe the future hindrance to be. Care to elaborate?
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06-04-2019, 01:29 PM
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#11
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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Sounds like a good idea to me.
My grey tank needs dumping 2x or 3x more often than my black tank (showers, clothes washer, dishwasher, etc.)
I was considering adding a manual vale to transfer some grey water into the blank tank so I don't need to dump as often.
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06-09-2019, 12:23 PM
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#12
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2010
Location: Lake Havasu City, AZ
Posts: 1,717
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When we first bought our coach I wondered why there were two tanks since they both get dumped to the same place....I soon realized that there were other things I needed to concentrate on and never gave it another thought . For me, I would prefer one big tank with one tank monitor and one dump valve.
__________________
2019 Newmar Dutch Star 4328 K2
2017 Grand Cherokee Summit 5.7
2008 Beaver Contessa 40' Pacifica 425 Cat
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06-11-2019, 02:38 PM
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#13
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Senior Member
Join Date: Mar 2000
Posts: 214
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NO.
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06-11-2019, 02:51 PM
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#14
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Senior Member
Monaco Owners Club Forest River Owners Club
Join Date: Jul 2012
Posts: 3,331
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The hindrance to me is IF iI forget or the sensor is wrong ,(and you will ). You will have have toilet waste in your shower pan! What's that Smell?
While not the end of the world, it's bad enough with sink water. I have combined my tanks, with a simple add on valve to get a couple more days boondocking but not day to day.No way.
Have C--- and P-- coming up 2-3" out of the shower pan and see what the DW says esp with that 2 am flush! .. just sayin
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2023 Coachmen Encore 325SS
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