Treatment

 is an unmarked Fallout 3 quest. When you ask "What needs to be done around here?", Walter asks you to fix broken pipes around Megaton. When asked why he can't fix them, he says he hasn't got the time.

The pipes require a repair skill of 30 or better to fix.

Location of pipes
The pipes that have to be fixed are leaking water from them. The locations are as follows:
 * 1) On top of the Children of Atom. Reached easily by jumping down from the right corner of the fence by Craterside Supply.
 * 2) On the hill where you enter. Right by the staircase to get to your Megaton house.
 * 3) On the hill opposite of where you enter Megaton that leads to the Common House.

Reward

 * Walter pays you 200 caps for fixing the pipes.
 * After the pipes are fixed, he also offers to buy Scrap Metal from you to maintain them. See Walter's Scrap Metal.

Bugs

 * This quest can become glitched and become either impossible to complete or, in some cases, to even start it. It has been found that the quest-giver, Walter, can fall to his death or wander away through gaps in world geometry. Furthermore it is possible for him to just disappear from Megaton (confirmed on the Xbox360 and PS3 version). On the PC version, you can recover him by using console commands described in this guide. His reference ID is 3b59. According to the latest patch notes, this issue has been fixed, or at least reduced in frequency. Unfortunately for console users, the patch does not resurrect Walter if he has already perished or disappeared in this fashion; the only solution is to load from an earlier save.
 * A glitch has been encountered (360 confirmed) that when you finsh fixing the pipes and have chosen to not sell Scrap Metal for caps if you leave and come back it will give you the option to fix them again but since you already fixed them you can chose the option again to get 400 caps instead of 200.