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What is a porta potty, exactly, and what is the difference from a porta john or portable toilet?

Brooke L.asked 0 viewsUnit Types & FeaturesStandard unitEtiquetteAda unitRestroom trailerEvent planning

A porta potty, porta john and portable toilet are three names for the same thing. These terms describe a self-contained, non-sewered sanitation unit. The industry standard term is a portable toilet. The unit consists of a molded plastic or fiberglass enclosure with a toilet seat over a holding tank that contains a chemical deodorizer.

Standard portable toilets are the most common type. They are non-flushing, with a gravity-fed waste system. A standard unit has a toilet seat, a urinal in some models, and a small toilet paper holder. It does not have running water. These units are used on construction sites, at outdoor events and for temporary needs where plumbing is unavailable.

Deluxe portable toilets add features like a flushing mechanism, a small sink with running water, a mirror and sometimes a hand towel dispenser. They use a foot pedal or hand pump to flush waste into the holding tank and to run water to the sink. The fresh water and waste are in separate tanks. These are often chosen for events like weddings or corporate functions where guests expect more comfort.

ADA-compliant portable toilets are wheelchair accessible. They are larger to allow a turning space for a wheelchair, have grab bars, a wider door and a toilet seat at wheelchair height. The ADA requires at least one accessible unit in any cluster of portable toilets at a single location.

Restroom trailers are towable units with multiple stalls, flushing toilets, sinks with running water, mirrors, lighting and sometimes climate control. They require a water hookup or an onboard fresh water tank, electrical power from a generator or outlet, and level ground for placement. They are serviced by the same vacuum trucks as standard units.

When planning an event, the type you choose depends on guest count, event duration, whether alcohol or food is served, the ground conditions and truck access for delivery and service. Ask me anything about picking the right unit for your situation.

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Porta Potty Forum Team moderatorUnited States

A porta potty, porta john and portable toilet are three names for the same thing. These terms describe a self-contained, non-sewered sanitation unit. The industry standard term is a portable toilet. The unit consists of a molded plastic or fiberglass enclosure with a toilet seat over a holding tank that contains a chemical deodorizer.

A standard portable toilet is the most common type. It is non-flushing, with a gravity-fed waste system and a holding tank that commonly holds 50 to 70 gallons. A deluxe portable toilet adds features like a flushing mechanism and a small sink with running water. An ADA-compliant portable toilet is larger and includes grab bars and a wider door to be wheelchair accessible; the ADA requires at least one accessible unit in any cluster at a single location. A restroom trailer is a towable unit with multiple flushing toilets and sinks.

OSHA 29 CFR 1926.51 sets minimum counts for construction sites by worker numbers. For events, a common planning guideline starts near one unit per 50 to 75 people for a four-hour event, adding more for alcohol, longer duration or crowds that are mostly women. Weekly service is the norm; heavier use, heat or flushing units require more frequent visits. The rental price is driven by the unit type, rental duration, service frequency, delivery distance and any add-ons like handwash stations or solar lights.

  • Brooke L. Thanks for the clear definitions. I'm planning a backyard wedding, and I need to figure out the right mix for 140 guests. This gives me a place to start.
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Jules T.Sacramento, CA

The team's summary is correct, but an important clarification is that 'porta potty' and 'porta john' are informal terms, while 'portable toilet' is the correct technical term used by rental companies and in standards like ANSI Z4.3. The difference between a standard portable toilet and a deluxe portable toilet is functional. A standard unit relies entirely on gravity, while a deluxe unit has a manual pump or foot pedal to flush waste and to supply water to a small sink from a separate fresh water tank. This mechanical system in a deluxe unit requires more frequent service visits because the fresh water tank is small and can be depleted quickly during an event.

  • Brooke L. Thanks, that clarifies the terminology for my wedding planning. I will ask the rental company if a deluxe unit is worth it for guests, given the extra service visits.

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