All,
My black water tank waste valve is leaking and seems to be a common problem with these original valves.
I couldn't find many threads regarding our specific type of original waste valve and it's removal/replacement.
VTS sells an aluminum adapter plate specifically for the Globe Trotter and
Caravel black tanks. These plates allow use of the new Valterra waste valves.
https://www.vintagetrailersupply.com...-p/vts-954.htm
**Original waste valve removal tips:
I ran into an issue removing the original waste valve - I wish I had photographed the process but here is a detailed description and hope it helps someone in need -
A few photos below of tank valve removed, close up of 1/4" stainless bolt head/size and close up of brass fitting with threads tapped:
The 4 bolts holding the old valve to the tank brass fitting were rusted badly - I had to use my grinder to grind all 4 heads off. I then used a mallet and gently hit the valve so it would slide off the old bolt stems.
Once the old valve was off, using a wrench I was able to unscrew only 1 of the 4 bolt stems - I grounded flat the other 3 stems so they were level with the brass fitting surface.
I then drilled out the remaining 3 bold stems slowly using larger bits and careful to stay in the middle of old bolt stem protecting the brass threads on the tank fitting. Be patient and careful -
**Also measure depth of hole and wrap some blue tape around your bits so you don't drill too deep**
*The 1 old bolt stem I was able to remove came in very handy so I could match the size and threads in my stainless bolt collection - Here is a photo of the bolt I used - Bolt head #'s "F 8932" which I believe is 1/4" - I used a 3" long stainless bolt and a small ratchet and carefully screwed the bolt into each hole applying pressure on bolt head and making sure the bolt was nice and straight as I screwed it into each hole tapping it out with new threads.
Real feeling of accomplishment doing this even though it did take me a couple of hours to remove tank and tap threads.
**I'll post more photos when I install the adapter and new waste valve.