Qingdao Tune Technology Co., Ltd. builds Toilet Trailers at its 4,500-square-meter production site in Shandong, China. These are self-contained mobile restrooms used at weddings, festivals, construction sites, disaster relief camps, and remote work locations. TUNE offers 1-stall to 6-stall models, plus an ADA-accessible version. Each trailer includes a galvanized steel chassis, insulated wall panels, onboard freshwater and waste tanks, and a choice of flushing toilet, sink, lighting, and climate control.
The smallest unit is a single-stall trailer on a single-axle chassis with a 2,000 lbs GVWR. It carries a 100-gallon freshwater tank and a 120-gallon waste tank, which is enough for about 100 guests over an eight-hour event. The 2-stall model adds a second private suite and uses a 150-gallon fresh tank with a 200-gallon waste tank. The 3-stall and 4-stall versions are built on tandem-axle frames and use 300 to 450-gallon waste tanks. The largest 6-stall trailer sits on a heavy-duty tandem or triple-axle frame rated at 7,000 lbs GVWR and holds a 650-gallon waste tank for high-traffic events and remote sites.
The main ladder frame is hot-dip galvanized to ASTM A123. The steel is submerged in molten zinc at 450°C, which coats the inside and outside of the tubing. This protects the frame against uric acid, cleaning chemicals, and road de-icing salts. The result is a chassis that holds up under years of rental and commercial use without rust-related structural problems.
Freshwater and waste are kept in separate tanks. The freshwater side uses food-grade polyethylene tanks and PEX piping. The waste side uses a smooth-bore ABS drain manifold with a one-way check valve and a liquid-seal trap before the tank. A negative-pressure roof vent with a charcoal filter pulls air out of the waste tank and helps prevent odor from returning to the stalls. Dump valves are sized for standard RV pump-out service, and larger models use a centralized 3-inch discharge valve.
Walls and ceiling panels use 50 mm thick sandwich panels with high-density polyurethane foam at 42 kg/m³. This reduces heat transfer in summer and keeps the interior warmer in winter. For cold climates, the underbelly can be fitted with heat-traced waste tanks and 110V or 220V heating blankets. With these options, the trailer can operate at ambient temperatures down to about -15°C without freezing the water lines.
The ADA Toilet Trailer uses a hydraulic drop-axle system that lowers the frame toward the ground. This reduces the slope of the folding 36-inch aluminum ramp. Inside, the layout provides a 60-inch wheelchair turning radius, stainless steel grab bars anchored into wall studs, a lowered toilet, and a low-reach automatic faucet. These features are intended to help public and municipal buyers meet accessibility requirements.
Interior finishes include ceramic pedal-flush or water-flush toilets, hands-free vanity sinks, motion-sensor lighting, and wall-mounted soap dispensers. Larger models can include waterless urinals to increase throughput. Climate control options range from a 9,000 BTU heat pump in the 1-stall unit to a 13,500 BTU roof air conditioner in the 2-stall and larger models. Flooring is commercial vinyl sheet with hot-welded edges, which limits moisture penetration and speeds up daily cleaning.
Every trailer goes through a 24-hour hydrostatic leak test on all freshwater lines and waste tanks at 45 PSI. Electrical wiring is tested at 1,500V for insulation resistance. Climate control units are bench-tested across thermal cycles. After final approval, the unit is wrapped in protective film, secured with wheel chocks, and loaded into containers or onto flat-rack vessels. TUNE provides a 12-month structural factory warranty and technical plumbing schematics.
Toilet Trailers can be supplied with CE, ISO 9001, DOT, EPR, COC, and NSF-aligned documents where required. TUNE holds Alibaba Gold Supplier status and has completed regular third-party inspections by SGS and Intertek. Certificate numbers, scope, and validity can be provided before ordering.
Q: Which size Toilet Trailer do I need for my event?
A: As a starting point, one stall is often enough for up to 100 guests over eight hours. For larger crowds, add stalls based on peak attendance and event length. We can help estimate capacity if you share the guest count and hours.
Q: How often does the waste tank need to be pumped out?
A: It depends on the tank size and visitor numbers. The 1-stall unit holds 120 gallons, while the 6-stall unit holds 650 gallons. For multi-day events, schedule pump-out service based on daily use. Standard RV dump connections are used.
Q: Can the trailer be used in winter?
A: Yes, with the cold-weather package. Heat-traced tanks and 110V or 220V heating blankets protect the plumbing down to about -15°C. Insulated walls and ceiling also help keep the interior usable.
Q: Is an ADA-compliant model available?
A: Yes. The ADA Toilet Trailer includes a drop-axle frame, a 36-inch ramp, a 60-inch turning radius, grab bars, and a lowered toilet and faucet.
Q: What after-sales support is included?
A: TUNE offers a 12-month structural warranty, remote technical support, and shipment of common spare parts such as pumps, faucets, and electrical components. Specific terms are stated in the contract.
