Best New England Boiled Dinner

Directions
Place corned beef and water in crockpot. Cover. Set on high.
When steaming vigorously, set to medium and continue cooking 2½ hours.
Remove meat from cooker.
Put potatoes, turnips, carrots and cabbage in cooker.
Place meat on top of vegetables.
Cover and when mixture is steaming briskly, set to medium.
Cook for 45 minutes.
Ham may be used in place of corned beef, if desired.