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How to Move the Toilet Drainage

Admin September 21, 2026

Moving the toilet drainage can be achieved by installing a drain shifter, but it is essential to strictly follow operational guidelines and assess potential risks.

I. Preparing Tools and Materials

  1. Drain Pipe: Shorten the drain pipe to the appropriate length based on the actual shifting distance, ensuring tight pipe connections.
  2. 110 Pipe Gasket: If the original pipe is a 110-type PVC pipe, use a matching gasket to seal the interface; if it is an old iron pipe, remove the original gasket to fit the new pipe.
  3. Upper Drain 110 Elbow: Used to change the direction of the drainage, it must match the size of the toilet drain outlet (usually a standard 110mm diameter).
  4. Auxiliary Tools: Include a saw (for cutting pipes), a level (for calibrating drainage slope), sealant (to prevent leaks), etc.

II. Installation Timing and Conditions

  1. Construction Phase: The shifting operation must be completed before laying floor tiles to avoid damaging the ground structure later.
  2. Drainage Slope Requirements: The longer the shifting distance, the greater the drainage slope required (generally, a slope of no less than 2% per meter is recommended) to ensure smooth sewage discharge. For example, when shifting by 1 meter, the end should be at least 2 centimeters lower than the starting point.
  3. Space Limitations: Ensure that the distance between the shifted pipe and walls or other facilities meets safety regulations (usually not less than 10 centimeters) to avoid affecting subsequent maintenance.

III. Operational Steps

  1. Removing the Original Drain Outlet: Clear debris around the original drain outlet to ensure a flat interface.
  2. Inserting the Drain Pipe: Vertically insert the shortened drain pipe into the original drain outlet, with a depth exceeding 5 centimeters for a secure fit.
  3. Installing the Elbow: Connect the upper drain 110 elbow and adjust the angle to direct the pipe toward the target position (such as the toilet installation point).
  4. Securing the Pipe: Use pipe clamps or brackets to secure the shifted pipe, preventing displacement or shaking.
  5. Sealing Treatment: Apply sealant or wrap Teflon tape around the interfaces to prevent leaks.

IV. Precautions and Risks

  1. Clogging Risk: The drain shifter increases the number of pipe bends. Insufficient slope or the use of inferior materials can easily lead to the accumulation of hair and debris, causing clogs.
  2. Sewage Backflow: An increase in bends may reduce drainage speed, especially during peak water usage periods, potentially causing sewage to backflow into the toilet.
  3. Impact on Flushing Effect: When the shifting distance exceeds 30 centimeters, it is advisable to choose a direct-flush toilet or increase the flushing force to compensate for the increased pipe resistance.
  4. Compliance Check: Some regions have strict regulations on drainage shifting. Consult property management or relevant authorities before construction to avoid illegal modifications.

Summary: Shifting the toilet drainage requires a comprehensive assessment of distance, slope, materials, and toilet type. It is advisable to prioritize short-distance shifting (recommended not to exceed 50 centimeters) and regularly check the pipe's smoothness to reduce long-term usage risks.