Mobile House Toilet Drainage

The common methods of toilet drainage in mobile houses and toilet relocation techniques are mainly as follows:

Common Sewage Disposal Methods for Mobile Houses

Mobile houses (such as mobile toilets) commonly have two sewage disposal methods: direct discharge and fecal tanks. Direct discharge involves directly discharging feces and other sewage to an external designated treatment area or sewer. Fecal tanks collect excrement in a dedicated fecal tank, which is then regularly cleaned and transported for treatment.

Toilet Relocation Methods

• Same-floor Drainage
  • Floor Slab Lowering: If the bathroom's building structure already has a lowered floor slab, with the floor sunken by 250mm - 350mm, toilet and other drain outlets can be arranged freely without location restrictions, making relocation convenient. However, this method is only applicable to units with already lowered floor slabs and is not universally applicable. When re-planning and laying out sewage pipes, it is recommended to use oblique tees, as their design allows for smoother water flow and reduces the likelihood of blockages.
  • Floor Slab Raising: Abandon the original drain outlet and create a new drain outlet on the raised bathroom floor to connect to the main sewage pipe. During construction, a lightweight block platform 180 - 200mm high needs to be built, with a toilet sewage pipe approximately 110mm in diameter pre-embedded, followed by leveling and tiling. The advantages of this method are long relocation distances and flexible layout, meeting diverse bathroom design needs. The disadvantages are inconvenience for the elderly, as the raised floor makes it more difficult for them to enter and exit, and a large workload involving multiple processes such as masonry and pre-embedding.
• Inter-floor Drainage
  • Drain Modification on the Ceiling Below: This requires negotiation with the neighbor below. During modification, proper waterproofing and the installation of a trap (for odor prevention) are essential. The advantages are unlimited relocation distances and flexible layout, allowing for significant adjustments to the toilet's position. The disadvantages are the disturbance to neighbors, which may lead to neighborly disputes.
  • Wall-mounted Drainage Modification: Install a steel structure in the bathroom, embed the water tank within it, and hang the toilet on the steel structure. The advantages are long relocation distances, aesthetic appeal, and ease of cleaning, enhancing the overall aesthetics of the bathroom. The disadvantage is the inability to relocate the toilet to the opposite wall of the sewage riser, limiting the toilet's relocation range.
  • Using a Toilet Relocator: Suitable for short-distance relocations within 100mm - 350mm, preferably not exceeding 400mm, as the risk of blockage increases beyond this. The implementation steps include purchasing a finished toilet relocator, chiseling out the floor slab by 20 - 40mm, pre-embedding the relocator, pouring the floor, waterproofing, tiling, and installing the toilet. The advantages are minimal modifications, low cost, and minimal impact on the overall bathroom structure. The disadvantages are short relocation distances, requiring a slope of more than 3% for drainage when exceeding 300mm.