Portable Water Tank for Mobile Toilets
A portable water tank for mobile toilets is a water storage device that does not require connection to a septic tank or utilities and can be transported and used directly with the toilet unit. The following provides an introduction from three aspects: structure, brand parameters, and application scenarios.

Structure and Function
The portable water tank is one of the core components of a mobile toilet, typically integrated with the fecal tank to form an independent and enclosed sewage treatment system. Its structure includes a water storage chamber, water inlet connector, water outlet pipe, and control valve. Some high-end models are equipped with water level sensors and automatic water replenishment devices. The tank is connected to the flushing system via pipes to provide flushing water for the toilet bowl, while its sealed design prevents odor leakage. For example, some products adopt a double-layer tank structure, with an outer insulation layer to adapt to low-temperature environments and an inner layer made of food-grade plastic to ensure water quality safety. Additionally, the top of the tank is often equipped with a vent hole, which, in combination with the ventilation louver on the top of the toilet, creates air convection, further optimizing the user experience.
Brands and Parameters
Mainstream brands in the market include Zhengda Hongye, Changjiu, Honggang Environmental Protection, etc., with significant differences in product parameters. In terms of working pressure, common specifications range from 0.3 MPa to 0.6 MPa, with some industrial-grade products reaching up to 100 MPa, although the latter are mostly used in special scenarios. The working temperature range covers 5°C to 80°C, adapting to different climatic conditions. The wall thickness varies from 1 mm to 12 mm, with thicker walls providing greater pressure resistance and durability but also increasing weight. For example, a certain model from Honggang Environmental Protection adopts a 6 mm wall thickness design, can withstand a pressure of 0.5 MPa, and has a working temperature range of 10°C to 70°C, making it suitable for long-term outdoor use.
Application Scenarios
The independence of portable water tanks makes them widely applicable in scenarios without water and electricity infrastructure. For example, in temporary locations such as construction sites, open-air music festivals, and disaster relief sites, they can be deployed directly through finished product transportation without on-site construction. Additionally, some high-end models are equipped with mobility devices, such as wheels or trailer structures, allowing for quick relocation to meet dynamic needs. Their sealed design and safety locks also ensure hygiene and safety during use, preventing secondary pollution.




