Possible Clues:

• Feature of space station bearing feature of door?
• Shuttle compartment
• Space vehicle exit
• Bell with tresses topped and tailed
• Pressure-adjusting chamber; obstructive bubble
• Bubble chamber?
• The cockney's hair will stop the flow with hair
• Spaceship chamber
• Wizard out West circumventing current plumbing problem
• Perfect line to break stone, cause of blockage