Drainer 
To dream about a drainer indicates that you are expelling your unnecessary feelings. This could also mean that you are simply drained emotionally.
Drain
To dream about a drain represents your desire to unleash your emotions. You should express yourself more. This dream can also indicate something that you spent energy on that wasn't worth it. The dream may also be a play on words and you should think about things that could be 'draining' you.
- 1