Mobile Bathtub to Toilet Conversion

Converting a mobile bathtub to a toilet requires a combination of structural assessment and functional adaptation, with core steps including demolition, waterproofing and drainage modification, material selection, and installation, with a strong focus on load-bearing capacity, waterproofing, and construction compliance.

I. Demolition and Structural Assessment

1. Demolition of the original bathtub and surrounding structures: Thoroughly remove the bathtub itself, surrounding masonry, and waterproofing layer, and chisel the floor down to the structural layer to ensure a flat base. For mobile structures, it is crucial to assess the load-bearing capacity (such as the load limits of metal or wooden frames) and stability of the original frame to prevent structural deformation or collapse due to the renovation.
2. Inspection of the drainage system: Verify whether the position of the original bathtub's drainage pipe matches the toilet's requirements (such as the positions of the toilet and floor drain). If modifications are needed, plan the new pipe routing in advance, especially considering that horizontal drainage in older buildings may require local adjustments.

II. Waterproofing and Drainage System Modification

1. Waterproofing treatment: The wall waterproofing should be reapplied to a height of 2.0m to 2.2m (recommended to the ceiling), and the floor waterproofing should cover the entire renovation area and extend more than 30cm around the perimeter. In mobile scenarios, ensure tight integration between the waterproofing layer and the original structure to prevent leaks.
2. Drainage slope and floor drain: The floor should be sloped from the shower area towards the floor drain (with a slope of ≥2%) to prevent water accumulation. If the original bathtub's floor drain position does not match the toilet's needs, a linear floor drain can be installed or the drainage pipe adjusted. In mobile structures, special attention should be paid to balancing the drainage slope with the stability of the frame.

III. Material Selection and Construction Details

1. Material suitability: For the floor and walls, it is recommended to use lightweight, waterproof, and easy-to-install materials (such as PVC panels, waterproof tiles, or composite flooring). In mobile scenarios, avoid using overly heavy materials (such as natural stone) to reduce the load on the frame.
2. Construction compliance: Ensure seamless integration between new and old waterproofing layers and a clear direction for floor sloping. If tile installation is involved, expansion joints should be reserved to prevent cracking.

IV. Installation of Toilet Functional Components

1. Toilet and shower enclosure: Choose a toilet type based on available space (such as a wall-mounted toilet to save space). The shower enclosure can be customized with glass partitions, ensuring secure installation without obstructing ventilation. In mobile scenarios, consider the frame's fixation method (such as expansion bolts or detachable connectors).
2. Accessories and ventilation: Install an exhaust fan or reserve ventilation openings to prevent moisture buildup. Mobile toilets can be equipped with portable water storage devices or connected to external water sources.

V. Cost and Supplier References

• Simple shower enclosures cost approximately 600 yuan per set, while complete shower enclosures cost around 3,200 yuan per set. Wholesale prices for mobile toilets or shower enclosures range from 800 yuan to several thousand yuan, depending on the material (such as stainless steel or plastic) and specifications. Choose suppliers accordingly.

Precautions: Before renovation, coordinate with the property management to confirm the feasibility of construction, especially when involving pipe modifications. Prioritize hiring a professional team for construction to ensure waterproofing, drainage, and structural safety.