Black tank vale replacement

[Idalogger52]

Well it’s our turn to have the old leaky Black tank vale. Looking under the coach there is a 1/2” propane line that runs from side to side, about 10” from the edge of the coroplast. The black tank and shower grey tanks are both under this area. My question is how do you get the coroplast down without taking all that propane piping out? Is it doable or does the piping have to be dismantled??
TIA

[daveinaz]

On ours, the propane pipe runs front to back, just past the edge of the aluminum clading that runs along the bottom. The pipe was clamped through the cloroplast into the underside. I was able to just unbol the clamp from the underside, then unbolt/undo the coroplast then slide the coroplast out from under the pipe. You will probably have to remove the entire section of coroplast. If not, it's still probably easier to just remove the entire section rather than fight with it while you're trying to work on the valves.