Home » Public Forums » GMCnet » macerator- thinking about install
| macerator- thinking about install [message #304870] |
Thu, 04 August 2016 06:45  |
kstockwell
Messages: 367
Registered: May 2016
Location: Putney VT
Karma: 4
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I've now dumped the new coach a handful of times and am surprised at how slow it is. 5 minutes in still a slow trickle of water coming out even when starting with a half tank (well what I think is a half tank)
My earlier concerns with a macerator was how slow it is (I've been behind them in line). 95% of the time we dump at the end of an event and get in line to dump. I don't want to be that person and I hate feeling rushed. We have an inaccessible septic tank at home and the nearest dump station (KOA) is $20. I could run a line to the toilet (which really seems gross, is it as bad as I think?)
Anyway, I'm now considering a macerator, two layouts.
One- macerator right up next to the tank, this seems like the most effective place but involves more initial work and I don't know that I can use the backflush that the portable one has.
Two- portable macerator that I would hook onto the existing end, I don't think this would speed up the process and could make it longer but it's easy to try out.
https://www.amazon.com/gp/product/B001HKZHIW/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
What do you guys use? What do you suggest? The long straight run from the tank to the output is so low there's not much help from gravity.
thanks
kelly
1978 Kingsley
Putney VT
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| Re: macerator- thinking about install [message #304871 is a reply to message #304870] |
Thu, 04 August 2016 07:38  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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I purchased a waterpowered macerator for about $100. It is portable, non-permanent install. You attach it to a typical water hose connection, the water pressure churns up and flushes the residue out an attached hose. Can push residue 100ft, you will need more hose. Seems tp empty tank pretty fast, never timed it. By moving a lever, it will flush out the tank also.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] macerator- thinking about install [message #304872 is a reply to message #304870] |
Thu, 04 August 2016 08:05 |
bdub
Messages: 1578
Registered: February 2004
Location: Central Texas
Karma: 5
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Kelley
Have you looked at these installations?
http://www.gmcmhphotos.com/photos/search.php?searchid=268941
It's not really that big of a job. It's so nice to just pull the hose from
the scabbard, uncap it, put it in the receptacle, and turn on the pump.
Wait a couple of minutes until you hear the pump start to cavitate, turn it
off, take it out of the receptacle, cap it, and slide it back into it's
scabbard. 5 minutes tops! Ya hardly even get your hands dirty!
One of the best upgrades you can do for your GMC (and yourself)
bdub
On Thu, Aug 4, 2016 at 6:45 AM, kelly stockwell wrote:
> I've now dumped the new coach a handful of times and am surprised at how
> slow it is. 5 minutes in still a slow trickle of water coming out even when
> starting with a half tank (well what I think is a half tank)
>
> My earlier concerns with a macerator was how slow it is (I've been behind
> them in line). 95% of the time we dump at the end of an event and get in
> line to dump. I don't want to be that person and I hate feeling rushed.
> We have an inaccessible septic tank at home and the nearest dump station
> (KOA) is $20. I could run a line to the toilet (which really seems gross,
> is it as bad as I think?)
>
> Anyway, I'm now considering a macerator, two layouts.
>
> One- macerator right up next to the tank, this seems like the most
> effective place but involves more initial work and I don't know that I can
> use the
> backflush that the portable one has.
>
> Two- portable macerator that I would hook onto the existing end, I don't
> think this would speed up the process and could make it longer but it's easy
> to try out.
>
> https://www.amazon.com/gp/product/B001HKZHIW/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
>
> What do you guys use? What do you suggest? The long straight run from
> the tank to the output is so low there's not much help from gravity.
>
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bdub
'76 Palm Beach/Central Texas
www.bdub.net
www.gmcmhphotos.com
www.gmcmotorhomemarketplace.com
www.gmcmhregistry.com
www.facebook.com/groups/classicgmcmotorhomes
www.facebook.com/groups/gmcmm
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| Re: [GMCnet] macerator- thinking about install [message #304889 is a reply to message #304870] |
Thu, 04 August 2016 11:19 |
Rob
Messages: 651
Registered: November 2013
Location: Victoria, BC
Karma: 3
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I hate dumping the GMC tanks - some sani-dump designs obviously have no idea about the waste tank hydrodynamics of a GMC… It's rare for me to come across a sani-dump that has a design that works well with our low tanks (although I found a great local one last weekend - $5).
I've got all the stuff to install a Jabsco macerator - but every time I look under there, it's hard to know how to do the layout. If I cut all the existing plumbing out - my camping season comes to a full stop! So I'm always procrastinating…
I did consider the portable one you linked to - but it didn't seem like a good long-term solution and I'd have something else that needs to be stored in the GMC (which for us always seems tight)…
So - I'll install my Jabsco at some point (maybe soon!).
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
On 2016-08-04, at 4:45 AM, kelly stockwell wrote:
> I've now dumped the new coach a handful of times and am surprised at how slow it is. 5 minutes in still a slow trickle of water coming out even when
> starting with a half tank (well what I think is a half tank)
>
> My earlier concerns with a macerator was how slow it is (I've been behind them in line). 95% of the time we dump at the end of an event and get in
> line to dump. I don't want to be that person and I hate feeling rushed. We have an inaccessible septic tank at home and the nearest dump station
> (KOA) is $20. I could run a line to the toilet (which really seems gross, is it as bad as I think?)
>
> Anyway, I'm now considering a macerator, two layouts.
>
> One- macerator right up next to the tank, this seems like the most effective place but involves more initial work and I don't know that I can use the
> backflush that the portable one has.
>
> Two- portable macerator that I would hook onto the existing end, I don't think this would speed up the process and could make it longer but it's easy
> to try out.
> https://www.amazon.com/gp/product/B001HKZHIW/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
>
> What do you guys use? What do you suggest? The long straight run from the tank to the output is so low there's not much help from gravity.
>
> thanks
> kelly
>
>
> --
> 1978 Kingsley
> Putney VT
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Rob -
Victoria, BC -
76 Royale - Rear Twins/Dry Bath
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| Re: [GMCnet] macerator- thinking about install [message #304899 is a reply to message #304889] |
Thu, 04 August 2016 15:08 |
kstockwell
Messages: 367
Registered: May 2016
Location: Putney VT
Karma: 4
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Senior Member |
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Thanks Rob, maybe I'll inspire you- or you can inspire me. The more I think about it, the more I think it should be permanent- same conclusion you came to.
I appreciate all the examples of other's installs!
kelly
[quote title=Rob wrote on Thu, 04 August 2016 12:19]I hate dumping the GMC tanks - some sani-dump designs obviously have no idea about the waste tank hydrodynamics of a GMC... It's rare for me to come across a sani-dump that has a design that works well with our low tanks (although I found a great local one last weekend - $5).
I've got all the stuff to install a Jabsco macerator - but every time I look under there, it's hard to know how to do the layout. If I cut all the existing plumbing out - my camping season comes to a full stop! So I'm always procrastinating...
I did consider the portable one you linked to - but it didn't seem like a good long-term solution and I'd have something else that needs to be stored in the GMC (which for us always seems tight)...
So - I'll install my Jabsco at some point (maybe soon!).
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
1978 Kingsley
Putney VT
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| Re: [GMCnet] macerator- thinking about install [message #304901 is a reply to message #304899] |
Thu, 04 August 2016 15:22 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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Should be permanent... I can see someone with a portable unit taking a long time, but pumping my full take with the macerator is very quick.
in case you need more info or ideas:
http://lqqkatjon.blogspot.com/search?q=macerator+install
If installed in a manner as above, you can dump with macerator or stinky slinky. I have never even owned or carry a stinky slinky.
I am on city sewer, with no outside clean out. There is a cleanout inside. I did plumb some 1" PVC pipe from there to to the outside of my home, and put a hookup outside for my macerator, so I can pump into my drain inside the house. It is not convenient to where i park my GMC at home, but in a bind, I can move the GMC over to the spot and pump into the drain. I am lucky that I found a free RV dump 5 minutes from my house, so I only have done that in early spring, or late fall when the free RV dump by the house is closed.
You might have a spot you can plumb into easily on your home sewer so you can dump at home.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] macerator- thinking about install [message #304904 is a reply to message #304901] |
Thu, 04 August 2016 17:36 |
kstockwell
Messages: 367
Registered: May 2016
Location: Putney VT
Karma: 4
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Senior Member |
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Thank you, I have a kitchen sink next to driveway I could maybe plumb into. That's been on my mind too
-kelly
lqqkatjon wrote on Thu, 04 August 2016 16:22Should be permanent... I can see someone with a portable unit taking a long time, but pumping my full take with the macerator is very quick.
in case you need more info or ideas:
http://lqqkatjon.blogspot.com/search?q=macerator+install
If installed in a manner as above, you can dump with macerator or stinky slinky. I have never even owned or carry a stinky slinky.
I am on city sewer, with no outside clean out. There is a cleanout inside. I did plumb some 1" PVC pipe from there to to the outside of my home, and put a hookup outside for my macerator, so I can pump into my drain inside the house. It is not convenient to where i park my GMC at home, but in a bind, I can move the GMC over to the spot and pump into the drain. I am lucky that I found a free RV dump 5 minutes from my house, so I only have done that in early spring, or late fall when the free RV dump by the house is closed.
You might have a spot you can plumb into easily on your home sewer so you can dump at home.
1978 Kingsley
Putney VT
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| Re: macerator- thinking about install [message #304905 is a reply to message #304870] |
Thu, 04 August 2016 17:36 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Macerator will NOT speed up the dump...
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] macerator- thinking about install [message #304913 is a reply to message #304905] |
Thu, 04 August 2016 20:17 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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I certainly would never claim that the Dump Time with a macerator is faster
than with a stinky slinky. But when one factors in the time to connect the
slinky, rinse it after use, and stow it, I submit that the total project
time is as long or longer than for the macerator. With the macerator one
yanks the hose out, runs the macerator, and slides the hose back into its
scabbard; done. That's without even considering the relative esthetics of
the two operations. :-)
Re: Plumbing. With both grey and black water tanks, I originally had a
single macerator, but the long, almost horizontal, run from the grey tank
to the macerator was always a hindrance to fully evacuating that tank.
Finally, I replaced that macerator with one for each tank, allowing me to
mount them near the tank drains. The outlets are tee'd together before the
dump hose. I always dump the black, then the grey, to clean the hose
before stowage. Even with this arrangement, I find it helps to lower the
rear of the coach during dumping. With macerator and high volume
compressor switches behind the tile-down tag, it's quick and easy to
control the entire operation.
Ken H.
On Thu, Aug 4, 2016 at 6:36 PM, Chris wrote:
> Macerator will NOT speed up the dump...
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: macerator- thinking about install [message #304915 is a reply to message #304870] |
Thu, 04 August 2016 20:39 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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My personal experience.
Macerator was nice to be able to push poo through a garden hose to the clean-out in front of my house, but I'm a flush-rinse-repeat sorta guy, and dumping my TWO tanks with the slinky is much faster and efficient than sucking it out of the ONE tank on my GMC. It is faster, quieter, and you can see via the clear adapter in front of the slinky that your tank is clear.
You can drink the Maerator kool-aid or you can do it the normal way. or, maybe I had a slow one...
If they are so great, then why is the GMC community the only one smitten with the damn things? These coaches are not THAT low to the ground... Most dumps and hookups I have encountered are at or below ground level.
...Ever had to take one apart and clean one?
Invest in a good flush attachment instead and keep the drain pipe simple.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] macerator- thinking about install [message #304918 is a reply to message #304915] |
Thu, 04 August 2016 22:08 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Chris,
We travel all over USA and Canada and found lot of dumps that had their
opening higher than the ground level by 6 inches to prevent rain storm and
snow from getting into their Septic tank system.
I use to think GMC people were crazy, now I changed my mind.
On Thu, Aug 4, 2016 at 6:39 PM, Chris wrote:
> My personal experience.
>
> Macerator was nice to be able to push poo through a garden hose to the
> clean-out in front of my house, but I'm a flush-rinse-repeat sorta guy, and
> dumping my TWO tanks with the slinky is much faster and efficient than
> sucking it out of the ONE tank on my GMC. It is faster, quieter, and you can
> see via the clear adapter in front of the slinky that your tank is clear.
>
> You can drink the Maerator kool-aid or you can do it the normal way. or,
> maybe I had a slow one...
>
> If they are so great, then why is the GMC community the only one smitten
> with the damn things? These coaches are not THAT low to the ground... Most
> dumps and hookups I have encountered are at or below ground level.
>
> ...Ever had to take one apart and clean one?
>
> Invest in a good flush attachment instead and keep the drain pipe simple.
> --
> -Chr$: Perpetual SmartAss
> Scottsdale, AZ
> 77 Ex-Kingsley 455 SOLD!
> 2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
>
> Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: macerator- thinking about install [message #304932 is a reply to message #304870] |
Fri, 05 August 2016 06:30 |
kstockwell
Messages: 367
Registered: May 2016
Location: Putney VT
Karma: 4
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Senior Member |
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I've been on SOB forums (that's right, i'm getting the lingo down), and there are lots of folks who love the macerator system. But I agree, I'm still a little skeptical.
I don't expect it to be faster, but honestly my tank was still trickling out liquid when I shut it down because of the line of people behind me.
Dumping at home is one of the bigger draws.
I had a Winnebago with a high Y pipe- I could dump both tanks in under 5 minutes, I would have never considered changing to a macerator on that. The GMC's single tank is such a drizzle and the hookup under the trailer hitch is a bitch. If I don't do the macerator I'll at least put a 45 degree in there and port it off to the driver's side. I have to think that a macerator just on the other side of the tank should work pretty well.
I have put in the extra shower drain which should keep the hair out of the tank. And we use the flush toilets/porta potties often when out and about.
So far only one person has said they went back to the 3" hose because they disliked the macerator.
Who knows, maybe I'll be the second person to do so.
Keep the opinions coming; I appreciate all angles.
-kelly
1978 Kingsley
Putney VT
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