Old House with Mobile Toilet
For adding a mobile toilet to an old house, you can refer to the following methods:

I. Using a Mobile Commode A mobile commode is a practical solution for individuals with mobility issues or for old houses with limited space. Its key advantage is that it does not require connection to fixed plumbing and can be flexibly placed in bedrooms, living rooms, or beside the bed, making it especially suitable for nighttime use to avoid falls caused by groping in the dark or slippery floors. When selecting one, pay close attention to the following indicators:
- Stability: Choose a model with a wide base and a low center of gravity, such as the YIHUI mobile commode, which is recognized for its stable structure.
- Height Adaptation: Adjust the commode height according to the user's height to ensure natural leg bending during use, reducing knee pressure.
- Cleaning Convenience: Prioritize models with removable inner buckets and smooth, easy-to-wipe surfaces to lower daily maintenance costs.
- Odor Control Design: Equip with odor-blocking structures such as sealed lids, activated carbon filters, or U-shaped traps to prevent odor diffusion.
- Mobility Flexibility: Install omnidirectional wheels at the bottom or use lightweight materials for easy repositioning as needed.
II. Septic Tank and Pipe Installation If the old house has certain renovation conditions, you can purchase a plastic septic tank and lay pipes to connect to a squat toilet, creating a simple sewage system. The specific steps include:
- Site Selection and Excavation: Choose a location at a reasonable distance from the house, with lower elevation and easy maintenance, to excavate the septic tank pit.
- Septic Tank Installation: Select a corrosion-resistant, well-sealed plastic septic tank and assemble it in layers according to the instructions.
- Pipe Laying: Connect the sewage pipe from the squat toilet to the septic tank, ensuring a reasonable slope (usually not less than 2%) to avoid blockages.
- Ventilation and Odor Control: Install a vent pipe on top of the septic tank to reduce odor accumulation. This solution requires some DIY skills, and it is recommended that non-professional users hire construction personnel for the operation.
III. Outdoor Installation When indoor space cannot meet the demand, you can add a toilet outdoors through the following methods:
- Wall-Attached Extension: Extend a lightweight structure (such as color steel plates or a glass house) from the exterior wall of the house, lay water and electricity pipes inside, and install standard bathroom fixtures.
- Lightweight Steel Structure House: Independently build a modular steel structure toilet in the yard, which has a short construction period and is movable, suitable for long-term use needs. Outdoor installation requires prior confirmation of land use rights and compliance with local building codes.
IV. Simple Dry Toilet In remote areas or temporary use scenarios, you can dig a fecal pit and build a simple dry toilet:
- Fecal Pit Design: The depth is recommended to be 1.5-2 meters, with a gravel or concrete anti-seepage layer laid at the bottom and covered with wooden boards or prefabricated covers at the top.
- Pipe Connection: Connect the squat toilet directly to the fecal pit through a PVC pipe, with a slope greater than 5% to ensure smooth flow of excreta.
- Hygiene Management: Regularly clean and disinfect the fecal pit and set up fences or green plants around it to avoid environmental pollution. This solution has low costs but requires strict adherence to environmental protection requirements to avoid pollution to groundwater or soil.




