You can use a Yes/No visibility filter with the use of a Shared Parameter or you can use the standard Service Type parameter that is already present in all Tray and Conduit system families.

If you only want to show services with a single parameter value you can use the Does Not Contain variable in the filter configuration. For example, if you only want to see conduits that have a parameter value of "ELV" you set the filter to be Does Not Contain "ELV" and then set the filter to be Off in the visibility and graphics settings for the related view template. This will turn off anything that does not have the ELV parameter value. Otherwise you'll need to specifically exclude every parameter value that you don't want to see individually.

Hoi Diana,

Ik heb mijn vorige antwoord aan jou verwijderd, deze was voor een ander bedoeld ;-)

Excuses.