Gravity vs. Vacuum

A Jets™ system gives great design flexibility, smaller pipes, fewer installation hours and considerable water savings.


The pleasing features of Jets™ vacuum

Comparison of gravity vs. vacuum sanitary systems

Design flexibility

  • Smaller space between the decks
  • Substantial savings in materials and construction costs
  • More flexible designs possible
  • Piping independent of gravity: rising pipe and horizontal lines without slope are possible.
  • Easier to position toilets - and lower-deck toilets need no separate pumping station
  • Easier retrofit with less deck penetration
  • Easier compliance with ever stricter international discharge regulations


Smaller pipes

  • Smaller diameter
  • Lightweight pipes
  • Fewer - and smaller - deck penetrations
  • Lower-cost components


Fewer installation hours

  • Lighter materials mean streamlined handling and reduced installation time
  • Simpler logistics - lower costs
  • Piping can be routed around ducts and other obstacles
  • Can be installed later than gravity piping


Water and sewage benefits

  • Saves precious water and weight on board
  • Less need for freshwater production and storage
  • Allows significantly smaller STP
  • Lower waste volume for the same number of toilets
  • Closed systems keeps sewage gases where they belong
  • No need for ventilation of piping
  • Withstands the roll and pitch of the vessel without risk of water or sewage leakage, even in harsh weather

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Jets™, Vacuumarator™, Helivac™, VC™, VOD™, CVS™ and Softsound™ are trademarks and/or registered trademarks of Jets AS. © Copyright 2014-2017, Jets AS
Contact Jets™: Phone (+47) 70 03 91 00 - Fax (+47) 70 03 91 01 -