Editing Apollo 13 (section)

=== Changes in response ===
[[File:Apollo 14 redesigned oxygen tank (S71-16745).jpg|thumb|Redesigned oxygen tank for Apollo{{nbsp}}14]]

For [[Apollo 14]] and subsequent missions, the oxygen tank was redesigned, the thermostats being upgraded to handle the proper voltage. The heaters were retained since they were necessary to maintain oxygen pressure. The stirring fans, with their unsealed motors, were removed, which meant the oxygen quantity gauge was no longer accurate. This required adding a third tank so that no tank would go below half full.{{sfn|Gatland|1976|p=281}} The third tank was placed in Bay{{nbsp}}1 of the SM, on the side opposite the other two, and was given an isolation valve that could isolate it from the fuel cells and from the other two oxygen tanks in an emergency and allow it to feed the CM's environmental system only. The quantity probe was upgraded from aluminum to stainless steel.{{sfn|Apollo 14 Press Kit|1971|pp=96–97}}

All electrical wiring in Bay{{nbsp}}4 was sheathed in stainless steel. The fuel cell oxygen supply valves were redesigned to isolate the Teflon-coated wiring from the oxygen. The spacecraft and Mission Control monitoring systems were modified to give more immediate and visible warnings of anomalies.{{sfn|Gatland|1976|p=281}} An emergency supply of {{convert|5|USgal|L|order=flip}} of water was stored in the CM, and an emergency battery, identical to those that powered the LM's descent stage, was placed in the SM. The LM was modified to make transfer of power from the LM to the CM easier.{{sfn|Apollo 14 Press Kit|1971|pp=96–98}}