"Portable toilet" is a single search term covering four very different products that show up under the same Amazon and Home Depot category page. Knowing which one fits your use case saves you from returning the wrong box.
If you searched "portable toilet rental" or "porta potty rental near me" ($6 CPC because rental companies pay for that traffic), you're looking for jobsite event-rental — not a product you buy. Honey Bucket, United Site Services, Rent-A-John, and Service Sanitation are the national rental networks. Standard single-stall rent is $90–$175/week with delivery and weekly service included; ADA-accessible units run $150–$350/week. Weddings and large events typically need one unit per 50 guests for a 4-hour window.
If your RV's cassette toilet handle won't flush or the seal is leaking, the most common parts to need are the Dometic 385318162 flush ball seal kit (3,600/mo searches) or the Thetford Aqua-Magic V blade seal. Replacement is 15–20 minutes with a screwdriver. Whole-toilet replacement on an RV runs $150–$500 and is typically a like-for-like swap; check rough-in and the orientation of the water supply line before ordering.
"Portable toilet for elderly" (1,900/mo) usually means a bedside commode — a freestanding metal-frame chair with a snap-out bowl, often with armrests and a backrest. Drive Medical and Carex are the volume brands at $50–$110. Not the same product as a camping toilet, despite Amazon's category overlap. If mobility allows getting to the bathroom but standing is the issue, a comfort-height toilet with grab bars is usually the better solution.
Browse RV cassette options, family camping models, emergency-kit bucket systems, and luxury portable units for long-stay applications. Filter by waste-capacity, indoor vs outdoor rating, and chemical-free options below.