Home » Public Forums » GMCnet » Macerator mystery solved
| Macerator mystery solved [message #219734] |
Sat, 24 August 2013 12:03  |
lance
Messages: 190
Registered: December 2004
Location: Vancouver, WA
Karma: 0
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OK, If you've been following my thread, here's how it went down. Because I have no gate valve, thanks to a PO, I can't remove the macerator from the drain pipe without a huge mess. I took a three gallon container and cracked loose the macerator assembly and slowly let the black water leak into my container. After dumping that several times, the holding tank was empty and I could remove the macerator. It worked perfectly, but the one thing I've failed to mention in previous posts is the PO also added a shut off valve on the output hose. I guess he had to do this because he removed the gate valve and fluid would just leak through the macerator. This brass shut off valve has a 3/8th inch passageway in the ball valve while the hose has a 3/4 inch inside diameter. it only took a bit of undesolved toilet paper to clog the 3/8 inch passage. I removed the shut off valve and all is well, except I now have to install a new gate valve.
Thanks to all out there so willing to share their advice and experience.
1974 Palm Beach
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| Re: [GMCnet] Macerator mystery solved [message #219738 is a reply to message #219734] |
Sat, 24 August 2013 12:07  |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
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I can't wait to inflict video of such a procedure on all of you. :)
On Sat, Aug 24, 2013 at 12:03 PM, Lance <lance@vonprum.com> wrote:
>
>
> OK, If you've been following my thread, here's how it went down. Because I
> have no gate valve, thanks to a PO, I can't remove the macerator from the
> drain pipe without a huge mess. I took a three gallon container and cracked
> loose the macerator assembly and slowly let the black water leak into my
> container. After dumping that several times, the holding tank was empty and
> I could remove the macerator. It worked perfectly, but the one thing I've
> failed to mention in previous posts is the PO also added a shut off valve
> on the output hose. I guess he had to do this because he removed the gate
> valve and fluid would just leak through the macerator. This brass shut off
> valve has a 3/8th inch passageway in the ball valve while the hose has a
> 3/4 inch inside diameter. it only took a bit of undesolved toilet paper to
> clog the 3/8 inch passage. I removed the shut off valve and all is well,
> except I now have to install a new gate valve.
>
> Thanks to all out there so willing to share their advice and experience.
> --
> 1976 Palm Beach
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Robin Hood
Jackson, MS
2013 Subaru Outback "Top Flight"
1968 Pontiac Catalina "The Cheshire Cat"
1978 GMC Royale motorhome "Pinto Bean"
1977 GMC Palm Beach motorhome "Barn Queen"
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| Re: [GMCnet] Macerator mystery solved [message #219746 is a reply to message #219745] |
Sat, 24 August 2013 12:37 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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| lance wrote on Sat, 24 August 2013 10:28 |
Boy! A video of what I just did would not be pretty.
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You mean a scene like in the movie Rv with you as the star?
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Macerator mystery solved [message #219772 is a reply to message #219738] |
Sat, 24 August 2013 15:16 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| Robin Hood wrote on Sat, 24 August 2013 10:07 |
I can't wait to inflict video of such a procedure on all of you. 
On Sat, Aug 24, 2013 at 12:03 PM, Lance <lance@vonprum.com> wrote:
>
>
> OK, If you've been following my thread, here's how it went down. Because I
> have no gate valve, thanks to a PO, I can't remove the macerator from the
> drain pipe without a huge mess. I took a three gallon container and cracked
> loose the macerator assembly and slowly let the black water leak into my
> container. After dumping that several times, the holding tank was empty and
> I could remove the macerator. It worked perfectly, but the one thing I've
> failed to mention in previous posts is the PO also added a shut off valve
> on the output hose. I guess he had to do this because he removed the gate
> valve and fluid would just leak through the macerator. This brass shut off
> valve has a 3/8th inch passageway in the ball valve while the hose has a
> 3/4 inch inside diameter. it only took a bit of undesolved toilet paper to
> clog the 3/8 inch passage. I removed the shut off valve and all is well,
> except I now have to install a new gate valve.
>
> Thanks to all out there so willing to share their advice and experience.
> --
> 1976 Palm Beach
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Robin Hood
Jackson, MS
2013 Subaru Outback "Top Flight"
1968 Pontiac Catalina "The Cheshire Cat"
1978 GMC Royale motorhome "Pinto Bean"
1977 GMC Palm Beach motorhome "Barn Queen"
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Robin,
It's a good thing watching your videos is not mandatory!  That's one I think I would have to skip. 
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Macerator mystery solved [message #219774 is a reply to message #219772] |
Sat, 24 August 2013 15:24 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
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Senior Member |
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No $hit
Sent from my iPhone
On Aug 24, 2013, at 1:16 PM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>
> Robin Hood wrote on Sat, 24 August 2013 10:07
>> I can't wait to inflict video of such a procedure on all of you. :)
>>
>>
>> On Sat, Aug 24, 2013 at 12:03 PM, Lance <lance@vonprum.com> wrote:
>>
>>>
>>>
>>> OK, If you've been following my thread, here's how it went down. Because I
>>> have no gate valve, thanks to a PO, I can't remove the macerator from the
>>> drain pipe without a huge mess. I took a three gallon container and cracked
>>> loose the macerator assembly and slowly let the black water leak into my
>>> container. After dumping that several times, the holding tank was empty and
>>> I could remove the macerator. It worked perfectly, but the one thing I've
>>> failed to mention in previous posts is the PO also added a shut off valve
>>> on the output hose. I guess he had to do this because he removed the gate
>>> valve and fluid would just leak through the macerator. This brass shut off
>>> valve has a 3/8th inch passageway in the ball valve while the hose has a
>>> 3/4 inch inside diameter. it only took a bit of undesolved toilet paper to
>>> clog the 3/8 inch passage. I removed the shut off valve and all is well,
>>> except I now have to install a new gate valve.
>>>
>>> Thanks to all out there so willing to share their advice and experience.
>>> --
>>> 1976 Palm Beach
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>>
>>
>> --
>> Robin Hood
>> Jackson, MS
>> 2013 Subaru Outback "Top Flight"
>> 1968 Pontiac Catalina "The Cheshire Cat"
>> 1978 GMC Royale motorhome "Pinto Bean"
>> 1977 GMC Palm Beach motorhome "Barn Queen"
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
> Robin,
>
> It's a good thing watching your videos is not mandatory! :lol: That's one I think I would have to skip. :roll:
> --
> Carl S.
> '75 ex Palm Beach
> Tucson, AZ.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Macerator mystery solved [message #220054 is a reply to message #219734] |
Mon, 26 August 2013 22:12 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Lance,
A THREE EIGHTS BALL VALVE!
WTH!
Never mind the pictures.
Regards,
Rob M.
-----Original Message-----
From: Lance
OK, If you've been following my thread, here's how it went down. Because I have no gate valve, thanks to a PO, I can't remove the
macerator from the drain pipe without a huge mess. I took a three gallon container and cracked loose the macerator assembly and
slowly let the black water leak into my container. After dumping that several times, the holding tank was empty and I could remove
the macerator. It worked perfectly, but the one thing I've failed to mention in previous posts is the PO also added a shut off valve
on the output hose. I guess he had to do this because he removed the gate valve and fluid would just leak through the macerator.
This brass shut off valve has a 3/8th inch passageway in the ball valve while the hose has a 3/4 inch inside diameter. it only took
a bit of undesolved toilet paper to clog the 3/8 inch passage. I removed the shut off valve and all is well, except I now have to
install a new gate valve.
Thanks to all out there so willing to share their advice and experience.
--
1976 Palm Beach
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Macerator mystery solved [message #236993 is a reply to message #236983] |
Wed, 22 January 2014 10:28 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Bill,
Your ideal of reversing the macerator motor's polarity to reverse it is
good in theory, but catastrophic in practice. The impellers will not, as
you hope, "fold over". Most likely, they'll just jam the motor and prevent
rotation. If they do fold over, it's probably because they're so
deteriorated that they'll break off from the unusual stress.
The best option for most macerator jams is to remove the cap (if installed)
from the non-pump end of the motor to reveal the slotted end of the motor
shaft. A screwdriver in that slot may allow you to clear the jam. If it
won't you're probably going to have to remove and disassemble the macerator.
JMHO after using them for 15+ years.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL
www.gmcwipersetc.com
On Wed, Jan 22, 2014 at 10:32 AM, Bill Dolinsky <Wildbillnick@yahoo.com>wrote:
>
> ...
> I have also read how occasional jams can be cleared with back flushing
> with water. I pulled up operators manuals and parts manuals for a couple
> manufacturers macerators and I don't see any reason you couldn't use a DPDT
> switch to reverse the polarity and spin the pump backwards to attempt
> freeing a blockage. The impellers should just fold over.
>
> I also like the idea of valve before macerator and emergency 3". My
> thoughts were I could shut off the valve before the macerator during winter
> operations..
>
> Thanks for this fantastic knowledge base! Bill
>
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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: [GMCnet] Macerator mystery solved [message #236999 is a reply to message #236993] |
Wed, 22 January 2014 11:06 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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Or back flush with a water hose
FREE WIFI @ Mickey D
On Jan 22, 2014, at 8:28 AM, Ken Henderson <hend4800@bellsouth.net> wrote:
> Bill,
>
> Your ideal of reversing the macerator motor's polarity to reverse it is
> good in theory, but catastrophic in practice. The impellers will not, as
> you hope, "fold over". Most likely, they'll just jam the motor and prevent
> rotation. If they do fold over, it's probably because they're so
> deteriorated that they'll break off from the unusual stress.
>
> The best option for most macerator jams is to remove the cap (if installed)
> from the non-pump end of the motor to reveal the slotted end of the motor
> shaft. A screwdriver in that slot may allow you to clear the jam. If it
> won't you're probably going to have to remove and disassemble the macerator.
>
> JMHO after using them for 15+ years.
>
> Ken H.
> Americus, GA
> '76 X-Birchaven w/Cad500/Howell EFI & EBL
> www.gmcwipersetc.com
>
>
> On Wed, Jan 22, 2014 at 10:32 AM, Bill Dolinsky <Wildbillnick@yahoo.com>wrote:
>
>>
>> ...
>> I have also read how occasional jams can be cleared with back flushing
>> with water. I pulled up operators manuals and parts manuals for a couple
>> manufacturers macerators and I don't see any reason you couldn't use a DPDT
>> switch to reverse the polarity and spin the pump backwards to attempt
>> freeing a blockage. The impellers should just fold over.
>>
>> I also like the idea of valve before macerator and emergency 3". My
>> thoughts were I could shut off the valve before the macerator during winter
>> operations..
>>
>> Thanks for this fantastic knowledge base! Bill
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Macerator mystery solved [message #237063 is a reply to message #237059] |
Wed, 22 January 2014 18:46 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Great typo, Matt.
A "weasy" removal. Maybe you should have typed "queasy".
Emery Stora
On Jan 22, 2014, at 5:29 PM, Matt Colie <matt7323tze@gmail.com> wrote:
>
>
> WildBill wrote on Wed, 22 January 2014 15:44
>> Assumed impeller would be similar to raw water pump on my boat... Thanks, for the info.
>
> Bill,
>
> It is Similar to the Oberdorfer pumps used most as raw water pumps on closed cooling boats, but the "blades" do fold more. The braking blades is also true on the boat version. Even though I almost never work on power boats, I get to see it a lot when and older engine shuts down and motors backward a turn or two.
>
> Your best bet with any macerator install is to set it up for weasy removal with a full black tank. That is when it will need to be removed and either cleared or repaired. When ever I had to deal with one for an owner, I charged double plus 10$ for gloves and they pay for time for my wash-up when the job is done. (It still isn't really worth it.)
>
> Matt
> --
> Matt & Mary Colie - Members GMCMI, GMCES Going to MontgomeryThe majestic, once snow covered glacier Chaumière is in for the winter.
> '73 Glacier 23 With 4 Rear Brakes that pull as they should
> SE Michigan - Twixt A2 and Detroit
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