Here's a pic of the waste valve on my '84 Allegro:
I have a couple of problems. First, whatever style fitting that is won't accept newer hoses or caps. The only cap that will fit is the original, which has 2 tangs on it unlike new ones that have 4. I tried to use my brother's Rhino hose this past weekend (long story) and it wouldn't fit either.
The other problem is the black valve is leaking significantly. And the old cap isn't holding it back.
I'd like to replace that fitting with one that accepts newer hardware, but I don't know what sort of valve I'd have to get. The gray water valve is new (you can almost see it on the right). I don't have a lot of room to work with on the black water pipe. The valve is installed at the end of a 90-degree elbow. I'm afraid if I cut it off, I won't have enough pipe to install a new valve. Things would snowball out of control from there. I'm wondering if just that valve will come out and I can replace it with a new one? This wouldn't solve my fitting/cap problem but I have to stop that leak at a minimum.
I have a couple of problems. First, whatever style fitting that is won't accept newer hoses or caps. The only cap that will fit is the original, which has 2 tangs on it unlike new ones that have 4. I tried to use my brother's Rhino hose this past weekend (long story) and it wouldn't fit either.
The other problem is the black valve is leaking significantly. And the old cap isn't holding it back.
I'd like to replace that fitting with one that accepts newer hardware, but I don't know what sort of valve I'd have to get. The gray water valve is new (you can almost see it on the right). I don't have a lot of room to work with on the black water pipe. The valve is installed at the end of a 90-degree elbow. I'm afraid if I cut it off, I won't have enough pipe to install a new valve. Things would snowball out of control from there. I'm wondering if just that valve will come out and I can replace it with a new one? This wouldn't solve my fitting/cap problem but I have to stop that leak at a minimum.
All fixed. The Thetford rebuild kit was perfect. I replaced the deformed blade seal as well as the o-ring on the outlet. Lubed everything up with Vaseline. It's all sealed up nicely. The Thetford-to-Valterra adapter sealed up, too, and I have a Valterra cap on it. I also have a Valterra fitting on my hose now.
It was not a pleasant job. There was indeed some TP stuck behind the valve, but that wasn't the cause of the leak. I set fire to all of the tools and clothing that I used in the repair when I was done.
On to the new range/oven - UPS will be dropping it off tomorrow!
It was not a pleasant job. There was indeed some TP stuck behind the valve, but that wasn't the cause of the leak. I set fire to all of the tools and clothing that I used in the repair when I was done.
On to the new range/oven - UPS will be dropping it off tomorrow!
1984Allegro wrote:
On my 84 Allegro I just used a Thetford to Valtera converter piece I got off the shelf at my local RV store. It is inline and is only a few inches long.
Yep - it fit perfect. But I haven't fixed the leaky black valve yet. Not looking forward to it.
Okay - I got a box full of parts today. I had just replaced the gray valve so I didn't want to go through that hassle again. That new valve will come off with that Thetford bayonet fitting leaving me with just the black water slide valve.
So, the parts I got are:
- black water slide valve rebuild kit. It looks like what I need, assuming I can get the valve apart
- Thetford-to-Valterra adapter. It fits nicely.
- New Valterra cap w/ hose fitting for gray water. It fits the adapter nicely
When installed, it doesn't stick out too far. It looks good.
I also got a Valterra-style stinky slinky fitting that I can install on my existing hose (it's new, too). It will meet up with the aforementioned adapter.
All told, $48 including shipping. Had I put in new valves and a Y assembly, I'd have needed the hose fitting and cap anyway. So I'm about $30 in with the rebuild kit and Thetford-to-Valterra adapter.
If the rebuild kit doesn't work, I'm in for a lot more work but not a ton more $$.
So, the parts I got are:
- black water slide valve rebuild kit. It looks like what I need, assuming I can get the valve apart
- Thetford-to-Valterra adapter. It fits nicely.
- New Valterra cap w/ hose fitting for gray water. It fits the adapter nicely
When installed, it doesn't stick out too far. It looks good.
I also got a Valterra-style stinky slinky fitting that I can install on my existing hose (it's new, too). It will meet up with the aforementioned adapter.
All told, $48 including shipping. Had I put in new valves and a Y assembly, I'd have needed the hose fitting and cap anyway. So I'm about $30 in with the rebuild kit and Thetford-to-Valterra adapter.
If the rebuild kit doesn't work, I'm in for a lot more work but not a ton more $$.
Matt_Colie wrote:
Jimmy,
I see the real problem is that you don't (and I don't either) know what that bayonet flange you have is.... I have never seen one like it before. I can tell you it is not Thetford, Vaterra or Columbia. Those are the only three that I know how to buy.
Matt
So that's not a Thetford bayonet? Now I'm really confused. The cap and valve say Thetford on it, but it could be a long-discontinued style given the fact that it's 30 years old.
I may wind up hacking it all out after all.
rockhillmanor wrote:
They just cut off both pipes coming from the black and gray and installed a whole new Y assembly. You can pick the Y assembly up at any camping store or dealership. I installs just like a residential fix under a sink with a rubber sleeve and hose clamps.
That way you would have the correct fitting for the sewer hose too.
Yeah, that's probably the best way to do it. I see different kinds of "y"s online that would work.
I've also seen the twist-on repair valves, too. But, I'd need an adapter to go from the Thetford to the Valterra, then twist on the repair valve. I think it would stick out too far by the time I was done with all of that.
GlennLever wrote:
Replacing the valve is not that hard.
When you replace it I would think you would be able to find the new style fitting.
I know this is not the same vehicle but maybe this helps?
Replaced both the gray and black water gate blade valves.
That looks like polybutylene pipe in your RV. You might consider replacing it as it can get brittle.
Another search revealed that Thetford to Valterra adapters are plentiful. If I can rebuild that valve I'm golden!! Thanks again!
Thanks all!
It is indeed a Thetford valve. Says right on it.
Now that the black tank is drained (another long story) I can open the valve and see what's going on. The rubber seal is all deformed - it's toast. It appears as if the blade is plastic.
It would be cool if there was a Thetford-to-normal-bayonet adapter but I haven't been able to come up with one. Maybe hacking that one out is an option.
If I replace the valve with a newer style, I'd have to hack the elbow off at the tank, which might not be the end of the world if I could slip a new elbow over the remnants. I'll have to hack away all that foam insulation to see what I'm dealing with.
In the meantime, I'll look for a thetford rebuild kit. Might be the best short term solution.
It is indeed a Thetford valve. Says right on it.
Now that the black tank is drained (another long story) I can open the valve and see what's going on. The rubber seal is all deformed - it's toast. It appears as if the blade is plastic.
It would be cool if there was a Thetford-to-normal-bayonet adapter but I haven't been able to come up with one. Maybe hacking that one out is an option.
If I replace the valve with a newer style, I'd have to hack the elbow off at the tank, which might not be the end of the world if I could slip a new elbow over the remnants. I'll have to hack away all that foam insulation to see what I'm dealing with.
In the meantime, I'll look for a thetford rebuild kit. Might be the best short term solution.
