Under my pool deck I took a cutoff of a Trex board and screwed it up for a shelf for vaseline and the chemical test kit. When I drained the pool and filter last fall I put the plug for the filter up on that shelf. And promptly forgot about it. After getting a new one while picking up the sand the other day I still did not remember where I put it. While getting things ready to hook the filter up I reached for the vaseline and there was the plug.