Maintenance (cleaning) to the siphon is the responsibility of the tenant.. Remember to clean the drainage and empty the siphon to prevent clogging. If the siphon clogged anyway, you can place a bucket under it and carefully turn and pull the siphon. Once it’s open, in most cases you’ll see the cause of the blockage immediately. After the siphon is cleaned, replace it correctly. Ensure that the siphon is not leaking.