Walter is the mechanic in Megaton who maintains the town's water processing plant.
- Main Article: Treatment
When you meet him for the first time, he'll tell you that there are leaks in 3 of the pipes around Megaton, which is giving the water plant trouble. He'll ask you to look around the town and fix the leaks.
 Walter's Scrap Metal
- Main Article: Walter's Scrap Metal
- This character could be a reference to the Walter in Fallout 1; where you have to exit the vault because the water pump doesn't work.
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