Skip to main content ↑ ↓
Topic: Thetford to Valterra (Read 1447 times) previous topic - next topic

Thetford to Valterra

Today I went to dump my waste tanks for the first time (they are full of Clorox and water).  Well that didnt happen.

I kept the hoses from my 5er as there were no hoses in the coach when I bought it and they dont fit the the Foretravel.

I think I would rather just change the fitting to the Valterra style.

Is this the part I need?

Termination Adapter

Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #1 –
Yes. And there are instructions on the board about how to remove the current terminator, and what glue to use.  Try search feature, and I'll take a quick look as well.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Thetford to Valterra

Reply #2 –
One way: Use a hacksaw blade (blade only) and make several cuts through the Thetford being careful to not cut the underlying pipe. Now use a heat gun or hair dryer, and heat the cut sections of Thetford, carefully using a flat screwdriver and pliers/vice grips to grab and pull sections off.

Once all the old Thetford is removed, use sand paper around circumference of the pipe.  Coat the pipe and new Valterra fitting with Oatey all purpose cement for PVC/ABS,  place fitting on pipe and give it  1/4 turn.  Align the lugs top to bottom, left to right like the removed fitting was, so a curved adapter will line up correctly.

From memory, make sure the glue is good for both ABS and PVC, as I believe you will have dis-similar materials to union.

Someone else may post alternative methods to get old fitting off.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Thetford to Valterra

Reply #3 –
FRUSTRATED WITH THETFORD CONNECTIONS 


Many different designs on on factory layout of sewer plumbing. Different approcahes work for different coaches. 

Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Thetford to Valterra

Reply #4 –
While you are doing this install a 3rd valve.
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: Thetford to Valterra

Reply #5 –
Quote from: AC7880 –
Yes. And there are instructions on the board about how to remove the current terminator, and what glue to use.  Try search feature, and I'll take a quick look as well.
I did search and most of the post were very old and no pictures as they kept talking about a 3 valve so I was not sure just what they were talking about.
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #6 –
Just sayin', I'd consider the drainmaster Wastemaster camlock system! A wonderful upgrade on my coach!

Best of luck on whatever you choose!
1996 36' U295 Build #4879 Motorcade #18088
2007 Jeep Liberty 4x4 FMCA #F474816
Foretravel Mid-South
There's no happy like Foretravel happy!

Re: Thetford to Valterra

Reply #7 –
Steve,
A third valve sits downstream from the original two. It allows you to dump your black water, close the third valve, open the grey water valve in order to flood the black water tank with grey water, close the grey water, open the third valve and "flush" the black water tank.
That has been one of the best ( and cheapest) mods we have done, and encourage you to do it.

Len
Len and Deb Speiser
1999 U270 36'
2017 Jeep Wrangler Unlimited
You're either on the bus, or you're off the bus!--Ken Kesey
If you're lucky enough to live in a bus, you're lucky enough!

Re: Thetford to Valterra

Reply #8 –
Thanks Dan, so it is like peeling a banana  ^.^d 
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #9 –
Quote from: red tractor –
While you are doing this install a 3rd valve.
So I have one valve for the black and one for the grey.  I take it that the 3rd valve goes between the cap and the other 2 valves?
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #10 –
Quote from: jhardman –
Just sayin', I'd consider the drainmaster Wastemaster camlock system! A wonderful upgrade on my coach!

Best of luck on whatever you choose!
Thanks, I saw that a year about when I had my trailer and had forgotten it.  that sure looks easier on the hands if you have arthritis in your fingers.
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #11 –
Quote from: lenspeiser –
Steve,
A third valve sits downstream from the original two. It allows you to dump your black water, close the third valve, open the grey water valve in order to flood the black water tank with grey water, close the grey water, open the third valve and "flush" the black water tank.
That has been one of the best ( and cheapest) mods we have done, and encourage you to do it.

Len
OK, thanks Len
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #14 –
Quote from: Super8mm –
Thanks Dan, so it is like peeling a banana  ^.^d 

Correct. And not all coaches have room for the third valve some install. Mine does not without serious replumbing.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Thetford to Valterra

Reply #15 –
Quote from: lenspeiser –
Steve,
A third valve sits downstream from the original two. It allows you to dump your black water, close the third valve, open the grey water valve in order to flood the black water tank with grey water, close the grey water, open the third valve and "flush" the black water tank.
That has been one of the best ( and cheapest) mods we have done, and encourage you to do it.

Len
A 3rd valve also helps prevent "surprises" when you pull off the cap.
1993 U225 Build #: 4285
500 Watts Solar
Honda CRV AWD
Former 1981 Foretravel Travco
Retired, Full Time Off Grid Snowbird

Re: Thetford to Valterra

Reply #16 –
Quote from: Dakota Slim –
A 3rd valve also helps prevent "surprises" when you pull off the cap.
I guess that would be like trying to push a weened calf up  a loading chute from behind, not a pretty picture  :o
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #17 –
Has anyone installed a third valve on an older coach with the narrow compartment?  My 280 doesn't have a lot of room on left side of soil pipe to remove the Thetford connection.

jk
Jack and Cathy
1992 U280 Unihome 36' Build #4034
Cummins 8.3 /  Allison MT647/ PacBrake
Apopka, FL / Barre Center, NY

Re: Thetford to Valterra

Reply #18 –
Jack, and Steve,

Since you have a 36' coach, I don't know what your utility compartment looks like.  Link below to a post showing our setup, along with parts list.  It may or may not be helpful:

Problems with third dump valve mod
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Thetford to Valterra

Reply #19 –
Quote from: Chuck & Jeannie –
Since you have a 36' coach, i don't know what your utility compartment looks like.  Link below to a post showing our setup, along with parts list.  It may or may not be helpful:
Thanks Chuck, I have not remove the panel yet but mine exits like yours does.  I will open it up when I get back next week and see what is there  ^.^d
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #20 –
Ok, here is a little followup on this topic.

I want to go with the Waste Master due to the ease of getting the hose on and off with arthritis in my hands.

BUT the the bayonet setup for our OEM had a 3.75" OD with the pins cut off.  Waste Master said the only fitting they have is the 3.5" ID, they do not make one to fit the 3" pipe.

So what I am going to have to do is cut off the only bayonet and put on a new style Valettra fitting and cut the pins off to put the Waster Master on over it.

So while I am cutting I will go ahead and add the 3rd valve.  There is always more than one way to skin a cat  ^.^d
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #21 –
Quote from: Super8mm –
Ok, here is a little followup on this topic.

I want to go with the Waste Master due to the ease of getting the hose on and off with arthritis in my hands.

BUT the the bayonet setup for our OEM had a 3.75" OD with the pins cut off.  Waste Master said the only fitting they have is the 3.5" ID, they do not make one to fit the 3" pipe.

So what I am going to have to do is cut off the only bayonet and put on a new style Valettra fitting and cut the pins off to put the Waster Master on over it.

So while I am cutting I will go ahead and add the 3rd valve.  There is always more than one way to skin a cat  ^.^d
Is the 3 3/4 od the same as a 3 1/2 id?
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Thetford to Valterra

Reply #22 –
Quote from: craneman –
Is the 3 3/4 od the same as a 3 1/2 id?
The 3 1/2" ID needs to slide over the 3 3/4" OD

If I had one to play with I would see if I could mount it in  the jaws of my wood lathe and remove .125 but then if I am going to add a 3 valve I might as well cut it off and add the 3rd valve then cut a short nipple to add the new Valterra style fitting.  The overall length should come out about the same.
Steve

1997 U270 36' build 5179
Motorcade #18147
1980 CJ5

Re: Thetford to Valterra

Reply #23 –
Quote from: Chuck & Jeannie –
Jack, and Steve,

Since you have a 36' coach, I don't know what your utility compartment looks like.  Link below to a post showing our setup, along with parts list.  It may or may not be helpful:

Problems with third dump valve mod

Thanks for the link, Chuck. I am posting a couple of pictures of space I have to work in on this coach.  I could probably get third valve in but it might be a case of not closing the compartment door.  The pictures are just aft of divider from the batteries .

jk

Jack and Cathy
1992 U280 Unihome 36' Build #4034
Cummins 8.3 /  Allison MT647/ PacBrake
Apopka, FL / Barre Center, NY

Re: Thetford to Valterra

Reply #24 –
You can buy the third valve that is bayonet mounted if you don't have room, just not as convenient.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake