Turn off the water.
Hot water tank drain valve broke off.
If this is a gate style valve a wheel that turns turn the valve clockwise as far as you can.
First ensure that the valve that brings water into your heater is closed.
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Again the water will be hot so use caution.
Place a pipe wrench into the drain valve body and turn it off slowly.
Allow the tank to cool for 24 hours before attempting this.
Remove the drain valve from the water heater.
This will stir up any remaining sediment.
Make sure the hot water outlet taps are also shut.
Rheem protech plastic drain valve for tank type water heaters model sp12159c 11 99 11 99.
Your water heater tank should have a dedicated shutoff valve on the cold inlet pipes.
If you experience a leaking water heater it is recommended to turn off the water to your tank.
Step 2 removing the broken drain valve.
Once all water has drained from the tank briefly turn on the cold water supply to the tank.