A standard porta potty holds waste in a 60 to 70 gallon tank below the seat, uses a small dose of deodorizing chemical to control odor and bacteria, and gets pumped out on a set schedule. No water line, no sewer hookup. Mobile Porta Pros services units across Mobile on a route built around each site's use.
There's no plumbing at all, and that's the point. Under the seat sits a holding tank, usually 60 to 70 gallons, built into a unit that measures about 44 by 48 inches on the ground and stands roughly 92 inches tall. Waste drops into the tank and mixes with a blue deodorizing chemical that breaks down solids and knocks back odor between services. There's no flush, no water pressure, nothing to freeze or back up the way a house line can. That's why you'll see a standard porta potty rental parked at a construction site, a backyard wedding, or a fishing camp outside Chickasaw with the same setup every time. A vent stack on top pulls air out and keeps the smell down. Toilet paper sits in a small dispenser mounted to the wall, and that's the whole system. Service techs come by on a route, pump the tank with a vacuum truck, rinse it, and dose it fresh. For anyone comparing what a day, a week, or a month actually costs, the porta potty rental cost guide breaks down pricing by duration, and the porta potty rental per day page covers short jobs specifically.
A deluxe flushable unit adds a small onboard freshwater tank and a foot pump or hand pump that pushes a rinse of water into the bowl after each use, similar to a camper toilet. The waste still goes into a holding tank below, just like a standard unit, but the flush cuts down on visible buildup and keeps the bowl cleaner between services. Some deluxe models add a sink with its own small water reservoir. These units run more than a standard porta potty and get used for weddings, corporate events, and any job where guests expect something closer to a real bathroom. Details on tank size, features, and where these make sense are on the deluxe flushable porta potty page. For anything bigger, a restroom trailer rental runs real plumbing off a fresh water tank and holding tank combo, with flush toilets, sinks with running water, and sometimes climate control. Mobile Porta Pros sets these up for weddings around Mobile and events as far out as Fairhope, about 22.3 miles southeast, and Daphne, 16.8 miles east.
A portable sink runs on the same no-plumbing idea. Fresh water sits in a tank, usually gravity fed or pushed by a hand pump or foot pump, and drains into a separate gray water tank underneath. Soap dispensers mount on the unit, and most models include paper towels or an air dryer. This matters because 29 CFR 1910.141(d)(2) requires washing facilities to have soap and a way to dry hands, not just sanitizer. A handwashing station rental or portable sink rental gets paired with porta potties on most job sites specifically to satisfy that requirement, since a toilet alone doesn't cover handwashing. On construction sites where crews are applying paints, coatings, herbicides, or insecticides, OSHA 1926.51(f)(1) requires washing facilities for that contaminant exposure specifically, not general use. A construction worker running to a porta potty on break still needs a sink nearby to meet that standard. If sanitizer-only setups won't cut it for your inspector, the hand sanitizer station rental page explains where sanitizer works and where it doesn't, and handwashing requirements lays out the difference in plain terms.
Because the tank fills and the chemical wears out. ANSI/PSAI Z4.3, the industry standard for portable sanitation, sets a baseline service interval of once a week for up to 10 users over a 40 hour week. A busy construction site in Mobile with more workers needs more frequent pumping, and OSHA 1926.51(c) sets the ratio: one toilet for 20 workers or fewer, then one toilet and one urinal per 40 workers once you're above that, scaling to one per 50 workers at 200 or more. Service techs empty the tank into a vacuum truck, rinse the interior, restock paper, and redose the chemical. Skipping service means a full tank, and a full tank means real problems fast. For camping trips, the same rules apply on a smaller scale. A camping porta potty still needs pumping if it's out for more than a week, even with light use. Curious how many units your job actually needs? The how many porta potties do I need guide runs the math against OSHA's ratio table.
Quick spec comparison
| Feature | Standard Unit | Deluxe Flushable | Restroom Trailer |
|---|---|---|---|
| Tank | 60-70 gal holding | Holding + small fresh water | Fresh + holding tanks |
| Flush | None | Foot/hand pump flush | Real flush plumbing |
| Sink | No | Sometimes | Yes, running water |
| Best for | Job sites, portable toilet rental | Weddings, event restroom rental | Multi-day events, 4 stall restroom trailer |
Job sites also need to think about accessibility. ADA Standards section 213.2 requires at least 5 percent of clustered single-user units to be accessible, and never fewer than one. The ADA accessible porta potty page covers unit specs, and ADA restroom requirements covers the broader rule set for events in Mobile.
A blue deodorizing formula, usually a mix of surfactants and fragrance, breaks down waste and masks odor between services. Techs add it fresh after every pump-out. It's not the same as septic tank cleaning chemicals used in home systems, which target bacteria balance in a 1,000+ gallon tank, not a portable unit.
Once a week is standard under ANSI/PSAI Z4.3 for light use, but busy sites need more. A crew of 40 workers, for example, needs service more than once weekly to keep up with OSHA's toilet ratio under 1926.51(c). Mobile Porta Pros builds the schedule around actual headcount.
They can, especially in heat, but proper servicing controls it. Fresh chemical, a working vent stack, and a schedule that matches usage keep smell down. The do porta potties smell page covers what causes odor and how to prevent it.
Same as a standard unit: a holding tank, a seat, and no plumbing. For multi-day camping trips, servicing mid-trip may be needed depending on group size. See camping porta potty for setup details specific to campsites and RV areas.
Yes. Weekend and short-term rentals are common for home projects and small gatherings. Check the porta potty rental checklist before ordering, and the porta potty rental per day page for short-duration pricing details.
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