The answer to 'sump pump slow draining' is that a slow or sluggish sump pump is often caused by a clogged or blocked intake screen or a worn-out pump impeller. This can lead to reduced water flow and slow drainage from the sump pit. Common symptoms include longer pump cycles, water backing up in the pit, and slower drainage of water.
To troubleshoot and fix a slow sump pump, start by checking the intake screen and removing any debris or buildup. You can also inspect the pump impeller and replace it if worn. If the pump is older, it may be time to replace the entire unit. For more complex issues or if you're not comfortable working on the sump pump, it's best to call a professional plumber.