Toilet Sewage Pipe Relocation

The toilet sewage pipe can be relocated, but appropriate methods must be selected based on the relocation distance, and construction specifications must be strictly followed.

I. Short-Distance Relocation (Within 40 cm)

1. Use Specialized Relocation Devices:

   • Flat or round relocation devices are the core tools for short-distance relocation. A drainage slope of 1%-2% (i.e., a drop of 1-2 cm per meter) must be maintained to ensure smooth sewage discharge.
   • The shorter the relocation distance, the lower the slope requirement. If the distance approaches 40 cm, the slope should be appropriately increased to 2%, and the number of elbows should be reduced (more elbows increase the risk of blockage).
   • Common relocation ranges: Standard relocation devices support 5-10 cm relocations, with special models capable of up to 15 cm. However, relocations exceeding 15 cm may cause drainage issues and should be carefully evaluated.

2. Construction Points:

   • Installation must be completed before laying floor tiles to avoid damaging the ground structure later.
   • Pipe joints must be sealed with sealant or specialized tape to prevent leakage.
   • If cutting floor slab reinforcement is necessary, contact professionals for reinforcement to avoid compromising building structural safety.

II. Long-Distance Relocation (Exceeding 40 cm)

1. Raise the Floor and Relay Pipes:

   • The entire floor must be raised by 20 cm to provide installation space for new pipes and meet slope requirements.
   • New pipes should be laid along the shortest path to minimize elbows and length, reducing the risk of blockage.

2. Special House Type Handling:

   • Sunken Bathrooms: Since pipes are buried in the sunken layer, they can be freely modified. However, cast iron pipes must be secured with clamps and coated with sealant to prevent loosening and leakage.
   • Same-Floor Drainage: Homeowners can decide the pipe direction but must ensure compliance with building codes. Inter-floor drainage requires approval from the property management and signatures from neighbors to avoid disputes.

III. Key Considerations

1. Waterproofing and Closed Water Test:

   • After relocation, the waterproof layer must be redone, especially at the junction between pipes and the floor slab. Waterproof coating should be applied and reinforced with non-woven fabric.
   • After waterproofing, conduct a 48-hour closed water test to check for leakage in the ceiling below. Construction can only continue after confirmation.

2. Compliance Requirements:

   • Confirm approval from property management before modification, especially for inter-floor drainage involving neighbors' rights. A written agreement must be signed.
   • Avoid using low-quality relocation devices or pipes. Prioritize PVC or cast iron materials for corrosion resistance and sealing.

Summary: Toilet sewage pipe relocation requires selecting a plan based on distance. Short distances should prioritize relocation devices, while long distances require raising the floor. During construction, strictly control slope, sealing, and waterproofing, and comply with property and building codes to ensure smooth drainage and living safety.