If you have a leaky Levo, there are a few things that could be causing it. The most common cause is a bad gasket or o-ring. These can deteriorate over time, especially if they're made of rubber. Another possibility is that the pump body itself is cracked. This is much less common, but it can happen if the pump is dropped or otherwise damaged.
If you suspect that your gasket or o-ring is to blame, the first thing to do is check for any visible damage. If you see any cracks or tears, then it's probably time to replace it. You can usually find replacement gaskets and o-rings at your local hardware store.
If there doesn't appear to be any damage to the gasket or o-ring, then the next step is to clean everything thoroughly. Sometimes dirt and grime can build up and prevent a good seal from forming. Once everything is clean, try reassembling the pump and see if that fixes the problem.
If your Levo is still leaking after trying these tips, then you may need to take it to a professional for repairs.