Yes, Absolutely. However, you MUST ensure that you are pumping into a sewer line and not a storm drain along the roadside.
There are systems that you can add to your coach that will chew up the waste (macerator) and pump it through a garden hose size hose. This could be pumped into a toilet (extreme caution must be exercised) or into an external sewer connection which may have to be installed.

Also most marine supply retailers sell the pumps with better quality for much less that the ripoff RV supply stores.

Here, here!

 

Janni,

I don't know your circumstances as to location and time, but there is a gentleman over on another forum selling a macerator for about $150.  I have no idea as to whether it is a good brand of macerator nor whether the price is good.  But, if you determine that it would be, his e-mail address is in the classified posting at Suites Owners International Travel Club (SOITC) forums.  Here is a link:

http://www.suitesowners.com/forums/showthread.php?2083-Flo-Jet-Macerator

Terry

janni wrote:

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Is there any way to dump a back or gray tank into a residential sewer line?  We are going to stay in my son's back yard (in town) and a long trip to the closest rv dump. 

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 Yes, if there is a cleanout all you have to do is hook up your elbow to it and dumnp like you would at a dump station.  JUst make sure the elbow is attached well.  If you are planning on staying any lenght of time you can run a pipe from a clean out closer to your rig.  You should be able to get all you would need from Home Depot or Lowe's. 

janni wrote:

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Living in town I dont think there is a cleanout(not sure) but he does have a basement bathroom that we can access.

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 Betcha the city codes require him to have a sewer cleanout access.  However, it may be in the basement.

A word of caution, some of the macerator pumps really pump.  If you do attempt a toilet, make sure there is communication and a quick shut off available.

 

53 Merc wrote:

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janni wrote:

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Living in town I dont think there is a cleanout(not sure) but he does have a basement bathroom that we can access.

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 Betcha the city codes require him to have a sewer cleanout access.  However, it may be in the basement.

A word of caution, some of the macerator pumps really pump.  If you do attempt a toilet, make sure there is communication and a quick shut off available.

 

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 I am no plumber, but having just snaked the drain a few months ago on my toilet in the S&B, I would think you can just shove the hose down the toilet past the trap and pump away without it backing up. Perhaps someone that is/was can oppose this view.

-- Edited by Cosmo on Tuesday 11th of October 2011 06:10:42 PM

-- Edited by Cosmo on Tuesday 11th of October 2011 06:11:44 PM

You won't need a macerator unless it's uphill from the RV to the clean out. If it's downhill you could just use the standard stinky-slinky hose(s). The SaniCon permanent mount came with our coach. I started out using it all the time, but found it was too slow for me, I didn't like standing around waiting for it to finish, so I went back to using the stinky-slinky RhinoFlex. I still use the macerator if parked in below freezing temperatures as it is very easy to use and then store in the basement. The only problem we have had with it was a toilet paper clog and probably not using enough water when flushing. We were just starting out with our RV and I probably wasn't doing a good job cleaning the tank out after dumping, coupled with "water saving" during flushes, and then with triple quilt toilet paper, it was only a matter of time before it clogged. Now that we know what we're doing we have had no issues with the macerator.

No macerator used in the last 10 years of full-timing. I can empty my tanks in a couple of minutes (or less) vs. waiting and waiting and waiting to dump via a garden hose sized tube and a macerator. I can see some specialty applications where a user might find this a handy option but in the last 10 years, I have not been able to dump properly even once!