You don’t want bathroom lines blocking entrances, obstructing sight lines, or in any way impeding the crowd flow. There is a saying that no man is an island. Our Work - Pmg Outdoor - Porta John Advertising - Porta Potty Ads Portable Restrooms Portable Toilet Dumpster Rental And how are porta potties emptied, you ask? How to porta potties work . If you have the battery operated version, ensure that your batteries are good, and it may be best to keep spare batteries. These porta potties are mounted on a towable trailer so you can drive them right up to. The podcast opens with a short history of portable restrooms, noting the introduction of portable restrooms in the 1940s. Basic models even have a separate urinal and. Porta potties are portable, so take advantage of this perk! From there, the vacuum sucks the waste into the storage unit on the truck. This clears away bacteria and anything else people have splashed around. The unit is removed and then turned around f...