Installing black water holding tank
We are installing a new black water holding tank and toilet in our TT. The tank is 26x62x7....3" drain and 1" vent. What fittings/grommets will we need for installation?
Forum Discussion
When I upgraded to a larger tank, the dump/exit flange was already installed. I just made sure it was in a good location for the trailer. And of course that the tank itself would fit properly and could be held in place properly (cut out some old and added some new angle iron across the frame for that)
You make your own cut outs in the tank top for the vent and toilet pipe.
When I dropped the old tank, after removing the toilet and old flange, the vent pipe came down with it. Just cut it off and leave it sticking up in the trailer. Then use the old tank as a pattern for the two holes needed in the top of the new. Glue in the 2 new flanges. Measure how much of the vent pipe you cut off (to get the old tank out). Glue a coupler and the needed extension to the old existing vent pipe left in the trailer. Push the new tank under the trailer, and glue in the modified vent pipe into the top of the tank.
Trickiest part of mounting the new was lifting it up in place with the glued in vent pipe. Two people will help. Before securing it tightly, adjust the toilet hole to line up with the hole in the floor.
Now measure the length of pipe needed from the tank top flange to the floor flange. Mine screwed in at the tank so getting this length right so the floor flange set level with the floor was a little tricky.
In my case, we doubled the size of the black tank, making life a lot easier with extended stays.
You make your own cut outs in the tank top for the vent and toilet pipe.
When I dropped the old tank, after removing the toilet and old flange, the vent pipe came down with it. Just cut it off and leave it sticking up in the trailer. Then use the old tank as a pattern for the two holes needed in the top of the new. Glue in the 2 new flanges. Measure how much of the vent pipe you cut off (to get the old tank out). Glue a coupler and the needed extension to the old existing vent pipe left in the trailer. Push the new tank under the trailer, and glue in the modified vent pipe into the top of the tank.
Trickiest part of mounting the new was lifting it up in place with the glued in vent pipe. Two people will help. Before securing it tightly, adjust the toilet hole to line up with the hole in the floor.
Now measure the length of pipe needed from the tank top flange to the floor flange. Mine screwed in at the tank so getting this length right so the floor flange set level with the floor was a little tricky.
In my case, we doubled the size of the black tank, making life a lot easier with extended stays.
