Relocation of Toilet in Old Community by 7 Meters

Relocating a toilet in an old community by 7 meters requires careful planning, with a focus on drainage methods, pipeline modification plans, and construction key points, as detailed below:

I. Confirmation of Drainage Method

1. Inter-floor Drainage: The pipeline extends through the floor slab to the ceiling slab of the lower floor. Modification requires coordination and consent from neighbors, making construction difficult. If there is a trap in the drainage pipe of the lower floor, moving the toilet by 7 meters may easily result in a double-sealed state between the siphon toilet and the trap, causing poor drainage. It is recommended to minimize the relocation distance as much as possible.
2. Same-floor Drainage: The pipeline is located on the ground floor of the same unit, offering high flexibility for modification without disturbing neighbors. It allows for long-distance relocation (e.g., across rooms), making it more suitable for renovations in old buildings.

II. Pipeline Modification Plan

1. Inter-floor Drainage:
   • Communicate with the residents of the lower floor to confirm whether they allow holes to be drilled in their ceiling slab or adjustments to the pipeline direction.
   • If the original drainage outlet position is fixed, the bathroom floor needs to be raised by 10-15cm to lay new pipelines connecting to the original main pipeline.
   • For short distances (≤30cm), a toilet offset connector can be used, but relocating by 7 meters far exceeds this short distance, and the offset connector is prone to clogging, so it should be used with caution.
   • Avoid damaging the structural integrity of the lower floor's ceiling slab during construction. After completion, ensure proper waterproofing and sound insulation; the pipeline slope should be ≥1% (a drop of 1cm per meter) to ensure smooth drainage.
2. Same-floor Drainage:
   • Directly cut grooves in the ground floor of the same unit to lay new drainage pipes to the target location.
   • If the direction of the main pipeline needs to be changed, re-plan the drainage path to ensure compatibility with the original system.
   • Conceal pipelines using wall-mounted toilets or built-in water tanks to enhance aesthetics.

III. Key Construction Points

1. Slope Control: When relocating by 7 meters, strictly ensure the slope of the drainage pipe to avoid water accumulation, which can cause odors or blockages.
2. Waterproofing: After pipeline modification, apply double waterproofing (waterproof coating + waterproof membrane) to joints and the ground.
3. Closed Water Test: Conduct a 48-hour closed water test after construction to confirm no leakage before backfilling the ground.
4. Noise Control: If the pipeline is close to the bedroom, wrap the drainage pipe with soundproof cotton to reduce flushing noise.

IV. Other Key Points

1. Material Selection: It is recommended to use 110 round pipes to ensure smooth and durable pipelines; if a wall-mounted toilet is selected, some relocation restrictions can be ignored.
2. Cost and Time: Material costs are approximately 200-800 yuan (including PVC drainage pipes, toilet offset connectors, waterproof coatings), and labor costs are approximately 500-1500 yuan; the construction period is about 3-5 days, requiring coordination between tile workers and plumbers.
3. Compliance: Before modification, report to the property management to confirm whether alterations to the drainage system are allowed; if involving load-bearing walls or main pipelines, a professional engineer should assess safety.