I'm in the process of moving our laundry area from inside the house to the garage. I'm not going to dismantle the old washer drain stack or plumbing, as future owners may want to relocate the laundry back--plus, well, that's just extra work I don't want to deal with.
The problem is the current washer drain stand pipe. If it's not in use, the p-trap will eventually evaporate, plus I have a hunch that it may not be properly vented in the first place (we sometimes get a strange odor from it).
What's the best way to plug this pipe non-permanently? The catch is that since it's part of a washer box (where the drain and faucets are integrated) there's no outside to the pipe for me to add a proper cap. Would a rubber cork suffice if I find one the right diameter? Or some other DIY technique? One thought I had was a water balloon...but that seems imperfect. :)