Mobile Toilet Renovation for Old Houses

The renovation of mobile toilets for old houses can be achieved through tailored solutions, with Shanghai providing valuable experience that can be emulated. It is essential to select the appropriate type of mobile toilet based on the house's conditions and provide comprehensive supporting services.

I. Tailoring Renovation Paths to Local Conditions
Shanghai promotes the renovation of mobile toilets in old houses through the approach of "one district, one policy; one project, one plan," with the core principle of respecting the original structure of the houses and the living habits of residents. For example, in the lane house at 1543 Sichuan North Road, Hongkou District, built in the 1920s and lacking indoor toilets, the renovation involved repurposing idle wardrobe space to install an electric toilet (due to the inability to lay sewage pipes) and adding a curtain for privacy. Such cases demonstrate that renovations should prioritize utilizing existing space, avoiding extensive demolition and construction, while ensuring residents' privacy and convenience in using the toilets.

II. Categorizing Mobile Toilet Types
Mobile toilets can be classified into three categories based on house conditions and needs:

1. By structural form: Single-unit mobile toilets are suitable for houses with limited space and can be placed independently in a corner; composite-structure mobile toilets are ideal for scenarios requiring integrated washing and storage functions.
2. By mobility method: Hoisting and carrying mobile toilets are suitable for short-term use or houses requiring frequent relocation; powered and towed mobile toilets are applicable to areas with vehicle access, facilitating overall relocation.
3. By sewage treatment method: Water-flush and non-water-flush suction mobile toilets require sewage pipes or regular pumping and are suitable for houses with municipal sewage networks or those accepting regular maintenance; recirculating water-flush mobile toilets reuse water through filtration systems, suitable for water-scarce areas; dry-packing mobile toilets do not require a water source, with feces packed and disposed of collectively, suitable for old houses without plumbing.

III. Establishing a Dynamic Tracking Service Mechanism
Shanghai emphasizes "one household, one policy" and long-term services in the renovation process. For instance, after completing the overall renovation task in September 2025, efforts continue to install flush toilets in 27 of the remaining 79 households, with a dynamic tracking mechanism ensuring that customized plans can be promptly developed when residents request renovations at any time. The key to this mechanism lies in coordinating resources from multiple parties (such as neighborhood committees, property management, and construction teams) and respecting residents' choices to avoid a one-size-fits-all approach to renovations.

IV. Technical Details and Considerations in Renovation

1. Space optimization: Given the limited ceiling height, load-bearing capacity, and ventilation in old houses, lightweight and low-noise equipment should be prioritized, with proper layout of ventilation ducts ensured.
2. Pipeline adaptation: If sewage pipes cannot be laid, electric toilets or dry-packing toilets can be selected, but power supply or feces disposal paths must be planned in advance.
3. Privacy protection: Curtains, partitions, or independent doors should be used to prevent direct connection between the toilet space and living space.
4. Long-term maintenance: The responsible party for equipment maintenance (such as property management or residents) should be clearly defined, with regular inspections of vulnerable components like water tanks and seals to extend service life.