Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 08, 2025 ...

George, before you dump again just make sure the volume of liquid in the gray tank is greater than the volume in the black tank or you could get black sewage in the gray tank. That's usually not a good thing to happen.

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Just found out that some Prevosts combine black and gray in a single tank.

Quote from: Kent Speers – November 29, 2010, 04:44:28 pm

George, before you dump again just make sure the volume of liquid in the gray tank is greater than the volume in the black tank or you could get black sewage in the gray tank. That's usually not a good thing to happen.
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I were to get a new coach
, I would get a single tank with the grey water bypass. In some places you can dump the grey water on the ground

Quote from: John Sichenze – December 05, 2010, 02:09:18 am

I were to get a new coach
, I would get a single tank with the grey water bypass. In some places you can dump the grey water on the ground

Surely that isn't the only option with the grey water bypass.  Most states we've visited prohibit discharge of grey water on the ground (with hefty fines if you do).  Of course, we haven't been to most of the west or central plains states where it may not be an issue.

Once we get settled in the USACOE Salt Springs Recreation Area near Ocala, FL in early January,  I will be dismantling our utility bay in order to access and replace the dump valves.  At the same time I would like to replace the black ribbed rubber mat in that bay, but I do not know where to buy it or what to use to adhere it in place.  Where would you look?

...
the third valve, it now prevents the left hand fiberglass panel from coming out of the bay. Without the proper cutting tool to get behind the wall, replacing the valves is very difficult....

Quote from: Kent & Peggy Speers – December 27, 2010, 09:23:28 pm

...
the third valve, it now prevents the left hand fiberglass panel from coming out of the bay. Without the proper cutting tool to get behind the wall, replacing the valves is very difficult....

Yuck! There must be a better way to add a third valve that doesn't trap the panel behind it. Is there room to add the third valve with "twist on/twist off" fittings?

I don't have a pic to post; but I bought a Valterra gate valve with a standard bayonet fitting and merely put it on the end of the sewer discharge.  I do have to be careful to keep the sewer hose tight when opening the tank valves; and, I can't fully close the bay door when hooked up.  When the temperature drops to freezing, I disconnect the sewer hose until needed, then fully close the bay door.

Kent,
 
Oh crap.  I knew it would not be easy, but I did not think about the new third valve being in the way, but you are so correct. Do you have any idea what the cutting tool is that the factory used.
 
I hope someone has some suggestions.
 
Thanks for the heads up.  I might have to cut off the new valve, and splice in a new section of sewer pipe after the repair.  Aarrggghhhhhhh!

FOT used a very small, air powered sawzall. I used the Black and Decker Handisaw, Amazon.com: Black & Decker CHS6000 6-Volt Handisaw Cordless Powered Hand Saw:. It is about the same size and very handy to carry in the motorhome.

Quote from: George Stoltz – December 27, 2010, 09:46:52 pm

Kent,
 
Oh crap.  I knew it would not be easy, but I did not think about the new third valve being in the way, but you are so correct. Do you have any idea what the cutting tool is that the factory used.
 
I hope someone has some suggestions.
 
Thanks for the heads up.  I might have to cut off the new valve, and splice in a new section of sewer pipe after the repair.  Aarrggghhhhhhh!

George, FOT used a very small, air powered sawzall. I used the Black and Decker Handisaw, Amazon.com: Black & Decker CHS6000 6-Volt Handisaw Cordless Powered Hand Saw:. It is about the same size and very handy to carry in the motorhome.

I would suggest that you do a complete replacement as a last resort. If the vegetable oil doesn't work, taking the valve apart, cleaning it and replacing the gaskets and blade should suffice. Then you don't have to cut anything and there is no realignment problem. If the valves are like mine, you just need a 1/4" ratchet and a 3/8" or 7/16" socket and box end wrench. An air ratchet would really help. Just be careful to not over tighten the bolts when reassembling. You can break the valve body easily.

Good Luck!!!
 

Quote from: Kent & Peggy Speers – December 27, 2010, 09:23:28 pm

...
the third valve, it now prevents the left hand fiberglass panel from coming out of the bay.

There must be a better way to add a third valve that doesn't trap the panel behind it.

I cut mine off just behind the fitting and attached a new valve an then a thetford fitting right to the valve. I can close the door and it is no longer than the original.