A porta potty holds waste in a sealed tank below the seat, usually 60 to 70 gallons, mixed with a blue deodorizing chemical that breaks down solids and cuts odor. No water, no plumbing. Richardson Porta Pros services each unit on a set schedule so the tank never gets close to full.
There's no flush and no pipe running anywhere. The seat sits over a holding tank, and everything drops straight down into a chemical solution that starts breaking down waste right away. That blue liquid you see is doing real work: it controls odor and slows bacterial growth. A vent stack runs up the back of the unit to pull sewer gas up and out instead of into the stall. Most standard units run 44 by 48 inches on the ground and stand about 92 inches tall, so they fit tight jobsite corners or a spot near a loading dock without eating much space. For a construction worker running to a porta potty between pours, the whole point is speed: no line, no wait on a single trailer restroom across the site. When the tank nears capacity, a service truck vacuums it out and refills the chemical charge. That's the entire cycle, and it repeats on a schedule that matches how many people are using the unit. If you're trying to figure out how many you need for a Richardson crew, our guide on how many porta potties do I need walks through the math. For the base rundown, see standard porta potty rental.
A deluxe or 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 use, similar to a boat toilet. It still drains into the same sealed holding tank underneath, it just clears the bowl between visits so the unit looks and smells better through a long event day. These run on the deluxe flushable porta potty line, and they're the ones we push for weddings and multi-day festivals in Richardson where guest comfort matters more than pure jobsite function. Check event restroom rental or wedding restroom rental options if that's the use case. An ADA unit works the same basic way but with a wider footprint and a turning circle inside, built to meet ADA Standards 304.3.1, which calls for a 60 inch diameter clear space. Door openings on accessible units meet ADA Standards 404.2.3 at a 32 inch minimum clear width. See ADA accessible porta potty for specs and pricing.
A portable sink is its own small system: a freshwater tank up top, a foot pump or hand pump that draws water through the faucet, and a gray water tank underneath that catches the runoff. No hookup to a building line, no hose to a hydrant. Soap dispenser is usually built into the unit or mounted next to it. This matters because 29 CFR 1910.141(d)(2) requires soap and a towel or drying device at any washing facility, not just water. Hand sanitizer alone doesn't satisfy that. On jobsites where crews are applying paint, coatings, herbicides, or insecticides, OSHA 1926.51(f)(1) requires washing facilities be available, which is exactly what a handwashing station rental or portable sink rental is built for. Farms running hand-labor crews fall under a different rule, OSHA 1928.110, which calls for one facility per 20 employees within a quarter mile walk. See farm and agricultural restrooms for that setup.
The chemical charge does two jobs: it breaks down waste and toilet paper, and it knocks down the ammonia smell that builds fast in a sealed tank sitting in Texas heat. Without it, a unit gets rank in days instead of a week. That's why a technician doesn't just check the tank, they refill the chemical and rinse the tank walls on every visit. ANSI/PSAI Z4.3, the industry service standard, sets one visit per week for up to 10 users across a 40 hour week as the baseline interval, though busier sites or events need more frequent stops. For jobsite counts, 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 cross 20, and per 50 workers once you're at 200 or more. Curious what a septic tank cleaning chemical does differently than a porta potty additive? Septic systems rely on bacteria breaking down solids over years, and a typical residential tank gets pumped every 3 to 5 years depending on tank size and household size. See septic pumping service or septic tank cleaning for that side of things. If you're comparing daily rates against a weekly rental for a Richardson project, porta potty rental per day and monthly porta potty rental break down both.
| unit | day | week | month |
|---|---|---|---|
| standard | $100 - $350 | $130 - $500 | $125 - $325 |
| ada | $200 - $400 | $240 - $240 | - |
| deluxe | $85 - $1200 | $150 - $290 | - |
Yes, same sealed-tank principle, just smaller and often self-contained for towing. Camping units use a lighter chemical charge and a smaller tank, meant for a few days between dumps rather than a week of jobsite traffic. See camping porta potty for sizing suited to short trips near Richardson.
A blue deodorizing and digesting solution, usually formaldehyde-free in most commercial blends now. It breaks down waste and paper while masking ammonia odor. Richardson Porta Pros refills this on every scheduled service, not just when a unit runs low.
ANSI/PSAI Z4.3 sets a baseline of one visit per week for up to 10 users. High-traffic jobsites or weekend events in Richardson often need two or three visits weekly. See how often are porta potties cleaned for details.
Placement on private property usually doesn't need one, but anything set in the public right of way needs confirming with the city directly. See porta potty permit requirements before you finalize a spot.
We regularly serve Murphy, about 8.5 miles northeast, and Sachse, roughly 10.3 miles east. Farmers Branch sits about 13.0 miles west. Check service areas or request a quote for your exact address.
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