The answer to 'water heater installation slow draining' is that a slow draining water heater is often caused by a buildup of sediment or mineral deposits in the tank. This can restrict water flow and cause the heater to drain slowly. Common symptoms include longer wait times to fill up a bathtub or sink, and reduced hot water pressure.
To fix a slow draining water heater, you can try flushing the tank to remove the sediment buildup. This involves connecting a hose to the drain valve at the bottom of the tank and running water through it until the water runs clear. If the problem persists, you may need to have the tank professionally cleaned or replaced. Older water heaters are more prone to this issue, so it's a good idea to have your heater serviced annually to prevent problems.