Porta potty glossary
45 terms that come up in answers on Porta Potty Forum, each defined in one or two sentences with its own page for the detail. Members link to these definitions instead of re-explaining them in every thread.
ADA 5 percent cluster rule
The ADA cluster rule is the provision in the 2010 ADA Standards for Accessible Design that, where multiple single-user portable toilets are clustered at one location, at least 5 percent of the units in each cluster must comply with the accessible toilet requirements and be identified with the International Symbol of Accessibility.
ADA-compliant portable toilet
An ADA-compliant portable toilet is a larger unit with a ground-level entry, a wide door, interior turning space for a wheelchair and grab bars, built to the accessible toilet requirements in the 2010 ADA Standards for Accessible Design. It is marked with the International Symbol of Accessibility.
ANSI Z4.3
ANSI Z4.3 is the American National Standard for minimum requirements for nonsewered waste-disposal systems, the reference document for how portable toilets are built, sized, placed and serviced. The Portable Sanitation Association International (PSAI) is its secretariat.
Buying versus renting a unit
Buying a portable toilet instead of renting one makes sense only when you can also handle the servicing: pumping the tank, disposing of the waste legally and keeping deodorizer and paper stocked. Most owners of a single unit still pay a rental company for service.
Cluster
A cluster is a group of portable toilets placed together at one location, often with a handwash station and a light. Events use several clusters spread across the site rather than one large bank, and the ADA percentage rule applies to each cluster.
Damage waiver
A damage waiver is an optional charge on a rental that limits what the renter pays if the unit is tipped, vandalized, burned or lost. Without it, the rental agreement makes the renter responsible for the repair or replacement cost.
Delivery fee
The delivery fee is the charge for bringing a portable toilet to the site and taking it away, usually quoted as one round-trip figure based on distance from the operator's yard. It is a separate line on the quote from the rental rate.
Deluxe portable toilet
A deluxe portable toilet is a standard-size unit upgraded for guest events: usually a flushing bowl, a small sink with a foot pump, a mirror, a paper towel holder, a coat hook and sometimes a solar light. It is the usual step up for weddings and corporate events.
Deodorizer
Deodorizer is the treatment added to a portable toilet's holding tank at each service: a blue dye that hides the contents, a fragrance, a surfactant and a biocide that slows the bacteria that produce odor. It comes as a liquid or a dissolvable packet.
Flushing portable toilet
A flushing portable toilet has a fresh water tank and a foot pump or hand pump that rinses the bowl into the holding tank, so users never see the tank contents. It looks and feels closer to a normal toilet than a standard unit.
Formaldehyde-free deodorizer
A formaldehyde-free deodorizer controls odor in a portable toilet holding tank with quaternary ammonium compounds, bronopol or enzyme and bacteria blends instead of formaldehyde. Many treatment plants refuse formaldehyde-bearing waste, which pushed the industry toward these products.
Fresh water tank
The fresh water tank is the onboard reservoir in a flushing unit, a handwash station or a restroom trailer that supplies flush water or sink water without a hookup. The driver refills it at each service.
Generator for restroom trailers
A generator supplies electrical power to a restroom trailer when the site has no outlet within reach; the trailer needs power for lights, water pumps, exhaust fans, heat or air conditioning and the water heater. Trailers can also run on shore power from dedicated circuits.
Gray water
Gray water is the used water from handwash stations and restroom trailer sinks, collected in a separate tank and pumped out by the service truck. It is not the same as the black water from toilets, but it still cannot be dumped on the ground at most sites.
Hand sanitizer dispenser
A hand sanitizer dispenser is a wall-mounted pump inside a portable toilet or a freestanding post next to a cluster, filled with alcohol-based sanitizer and refilled at each service. It is the low-cost alternative to a handwash station when water is not required.
Handwash station
A handwash station is a freestanding portable sink with a fresh water tank, a foot pump, a soap dispenser and a paper towel holder, placed next to a group of portable toilets. Health departments commonly require handwashing near food service and at events.
Health department rules
Health department rules are the state and county public health requirements that apply to portable toilets at events and food service: handwashing near food, distance from food preparation, waste hauling by a permitted septage hauler and disposal at an approved facility. They are enforced by environmental health inspectors.
High-rise unit
A high-rise unit is a portable toilet built or fitted to be lifted by crane or hoist onto upper floors of a building under construction, with lifting points, a smaller footprint to fit an elevator or hoist car, and a tank that is serviced in place with a long hose or by lowering the unit.
Holding tank
The holding tank is the sealed reservoir under the seat of a portable toilet that collects waste, flush water and deodorizer until a vacuum truck pumps it out. Standard units hold roughly 50 to 70 gallons depending on the model.
Level ground
Level ground is the flat, firm surface a portable toilet must sit on so the door swings correctly, the unit does not rock or tip, and the tank contents stay away from the door. Operators place units on shims or plywood when the ground is uneven.
Leveling a restroom trailer
Leveling is the setup step where the driver uses the trailer's jacks and blocking to make the restroom trailer level front to back and side to side so doors close, drains flow and tank sensors read correctly. It is part of the delivery and setup fee.
Long-term rental
A long-term rental is a portable toilet placed for weeks or months at a construction site, a farm, a camp, a renovation or a business without restrooms, billed monthly with weekly service. It is the core of most rental companies' business.
Missed service
A missed service is a scheduled service visit the driver could not complete, usually because the truck could not reach the unit: a locked gate, a blocked drive, vehicles parked in front, soft ground or a unit moved by the customer. Most agreements bill the trip and reschedule.
Monthly rental rate
The monthly rental rate is the recurring charge for a portable toilet on a construction site, a home renovation or a long-term site, and it normally includes one service per week. Many companies bill on a 28-day cycle rather than a calendar month.
Odor control
Odor control in a portable toilet is a combination of deodorizer in the tank, service frequency, ventilation and shade. A unit smells when the tank is overdue, the deodorizer is used up, the vent is blocked or the unit sits in full sun.
OSHA 29 CFR 1926.51
OSHA 29 CFR 1926.51 is the construction industry sanitation standard that sets the minimum number of toilets on a job site by crew size: one toilet for 20 or fewer workers, one toilet seat and one urinal per 40 workers from 20 to 199 workers, and one toilet seat and one urinal per 50 workers at 200 or more. It also covers drinking water and washing facilities.
Placement
Placement is where a portable toilet stands: on level, firm ground within truck access, away from food and drink service, downwind of guests, out of vehicle paths, with a lit and accessible route for users. Good placement prevents tip-overs, odor complaints and missed service.
Portable urinal
A portable urinal is a freestanding multi-user unit or an in-unit fixture that speeds up throughput for male users and reduces load on the toilet seats. OSHA counts a urinal as one fixture in the construction ratio.
PSAI (Portable Sanitation Association International)
The PSAI is the trade association for the portable sanitation industry: rental operators, manufacturers and suppliers. It maintains the ANSI Z4.3 standard, runs training and certification for operators and publishes planning guidance for events.
Restroom trailer
A restroom trailer is a towable enclosed building with flushing toilets, sinks with running water, mirrors, lighting, climate control and often separate men's and women's sides, used for weddings, corporate events, film sets and long-term office sites. It needs level ground, electrical power and either a water hookup or an onboard fresh water tank.
Right-of-way placement
Right-of-way placement is putting a portable toilet on a public sidewalk, street or parking lane, which requires an obstruction or right-of-way permit from the city in most places. Urban construction sites use it when there is no room on the lot.
Service frequency
Service frequency is how often a portable toilet is pumped and cleaned, from once a week for a lightly used construction unit to daily for a festival cluster. The right frequency depends on users per day, hours of use, heat and whether the unit has a flushing water tank.
Service visit
A service visit is the scheduled stop by a vacuum truck driver who pumps the holding tank, recharges the deodorizer and water, cleans the interior, restocks toilet paper and checks the unit for damage. Weekly service is the industry norm for a unit in normal use.
Solar light
A solar light is a small motion-activated LED fixture mounted inside or on a portable toilet, charged by a panel on the roof, used for events that run after dark and for sites without power. Lighting is often required by permit for night events.
Special event permit
A special event permit is the city or county approval for an event on public property or open to the public, and it almost always includes a sanitation section: number of toilets, accessible units, placement, service schedule and removal deadline. Portable toilets on a street or in a park are usually a permit condition.
Staking and tie-downs
Staking is anchoring a portable toilet to the ground with stakes through the base skids or ratchet straps to a fixed point so wind cannot tip it over. Operators stake units on open sites, roofs, beaches and anywhere with a wind exposure.
Standard portable toilet
A standard portable toilet is a single-occupant plastic unit with a non-flushing holding tank under the seat, a urinal in many models, a toilet paper holder, a vent stack and a lockable door. It is the base unit for construction sites, festivals and home renovations.
Truck access
Truck access is the requirement that the delivery and service truck can drive to within hose reach of a portable toilet on firm ground, usually within about 25 feet, with clearance for a tall vehicle and room to turn around. It is the first thing an operator checks before quoting a site.
Turning space (ADA)
Turning space is the clear floor area inside an accessible portable toilet, either a 60-inch diameter circle or a T-shaped space, that lets a wheelchair user turn around. It is the main reason ADA units are larger than standard units.
Units per person guideline
The units-per-person guideline is the industry planning chart that estimates how many portable toilets an event needs from the crowd size and the hours of use. Common charts start near one unit per 50 to 75 people for a four-hour event and add units for alcohol, longer hours and food service.
Vacuum truck
A vacuum truck is the service vehicle with a vacuum pump, a waste tank and a fresh water tank that pumps out portable toilet holding tanks on a route and hauls the waste to a treatment plant or approved disposal site. Route drivers service dozens of units a day from one truck.
Vent stack
The vent stack is the pipe that runs from the holding tank up through the roof of a portable toilet so tank gases escape above head height instead of into the cabin. A blocked or broken vent is one cause of a unit that smells more than its neighbors.
Waste disposal
Waste disposal is what happens after the vacuum truck leaves: the waste is hauled to a wastewater treatment plant, a permitted septage receiving station or a lagoon that accepts it, and the operator pays a per-gallon or per-load dump fee. Disposal is regulated by state and local rules.
Weekend or event rate
The weekend or event rate is the flat price for a portable toilet delivered before an event and picked up after it, typically covering Friday to Monday. It includes one cleaning before delivery and, at some companies, a service visit during a multi-day event.
Winterization
Winterization is what an operator does to keep a portable toilet usable below freezing: adding a brine or salt solution or a non-toxic antifreeze to the holding tank, draining or treating fresh water tanks in flushing units and sinks, and adjusting service so the truck's hose and pump do not freeze.