| [GMCnet] Black Tank Replacement Questions [message #344738] |
Mon, 01 July 2019 17:05 |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
|
Senior Member |
|
|
Ho Jon,
With respect to a macerator, know that most all of brands use the same internals which includes only rudimentary shaft seals. Over time yuk water can leak past the shaft seal in the impeller chamber and into the motor causing all kinds of issues. If the macerator is unused for any protracted period of time the impeller may stick to the sides and sheer off one or more of the rubber blades when next turned on. So, my experience was to always exercise the macerator and slide valves at least once a month if just to run water through an empty tank if necessary. Never store the coach with anything in the black or combined (GMC) tank. I used both a 1 inch and a 3/4 inch discharge line. Both worked fine, the 1 inch is faster.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
================
Message: 1
Date: Mon, 01 Jul 2019 12:28:24 -0600
From: Jon Roche
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Black Tank Replacement Questions
Message-ID:
Content-Type: text/plain; charset="utf-8"
I think my failure has to do with where mine is mounted. it gets it's share of road spray, and I think it gets some snow/ice on it as well, just
from where it is parked. I should also update my current mounting of the macerator is actually a little higher. I did pull it once, flip the pump
head, so the feet could be facing upwards. That gave me some more clearance to the ground. It would actually be best to move that pump back
towards the front a little bit, but when I first installed it with my old tank, that was not working well. With a new tank, I can see how it could
go back more to be protected. My macerator in it's early years before I moved it up an inch higher, was tore off twice. Once when the wife was
backed up a steep crappy campsite. and a second time when I misjudged an alleyway incline and my bags were probably a little down that day too.
so the past 8 years has been a rough 8 years for that pump. And the pump might be fine. The only troubleshooting I did yesterday was to check for
12.x volts leaving my switch that goes to the pump. I am just using a 30 amp rated switch that comes off a circuit breaker fed by the house
batteries. either 12 or 10awg wire, but it is a 2 or 3' wire. I also have girls with long hair, so 8 years of showering those kits might be
wrapped up in that pump too.
Matt is right about the valves and the 3" dump. Always nice to have fail-safes. But you want to move your valves a couple times a year. I have
seen many rods come out of old valves that have never been open for years. I know mine all get operated when I winterize/summerize.
Another thing on the macerator, I kept a 1" discharge hose. I know many people pumping a 3/4" discharge hose. both work and I have seen others
that have been using a 3/4" hose for decades, but I personally think pumping through a 1" hose is faster and easier for the macerator.
Stu-
as far as flushing out the tank. I think just good tank maintenance. a flushing system is good only if it works and does not cause more things to
leak later. I personally skip any flushing system. fill up and rinse the tank. I think water sloshing around while driving does the best job
of cleaning things. I am fortunate to have a dump station near my house, so I always dump after driving a while. Use lots of water and have had no
problems.
--
Jon Roche
75 palm beach
St. Cloud, MN
http://lqqkatjon.blogspot.com/
=====================
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jerry & Sharon Work
78 Royale
Kerby, OR
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
