How to Move the Toilet Floor Drain

Moving the toilet floor drain requires careful construction, combining pre-relocation checks with standard operating procedures. The specific steps are as follows:

I. Three Pre-Relocation Checks Must Be Completed Before Moving

1. Confirm the Material of the Original Sewer Pipe:

   • If the house was built before the 1990s (such as in a unit family compound), it is mostly made of cast iron sewer pipes, which have poor corrosion resistance and are prone to aging. The relocation distance must not exceed 30 cm, otherwise, it is prone to causing blockages or leaks.
   • If it is a commercial housing built after 2000, PVC pipes are usually used, and the relocation distance can be up to 1 meter, but it needs to be adjusted according to the actual pipe strength.

2. Measure the Position of the Main Sewer Pipe and the Relocation Direction:

   • It is necessary to clarify the joint position of the original main sewer pipe (the thick pipe that vertically penetrates the floor slab). When relocating, avoid the joint area of the main sewer pipe to prevent damaging its sealing performance.
   • It is strictly prohibited to relocate in the direction opposite to the slope of the main sewer pipe (i.e., the end of the pipe is lower than the entrance of the main sewer pipe), otherwise, it will cause drainage backflow and form hidden water accumulation risks.

3. Evaluate the Space for Raising the Floor:

   • Relocating requires laying new pipes, and the floor needs to be raised by at least 3 cm to accommodate the pipe slope. If it is a sunken bathroom (with a thicker backfill layer), the requirements can be relaxed, but the compactness of the backfill material must be ensured.

II. Standard Construction Procedures for Floor Drain Relocation

1. Pipe Material Selection:

   • When the relocation distance is ≤ 30 cm, select the national standard 50 pipe (outer diameter 50 mm); if it is > 30 cm, it is recommended to upgrade to the 75 pipe (outer diameter 75 mm), and the pipe wall thickness should be ≥ 3 mm to ensure drainage flow and compressive resistance.

2. Slope Reservation:

   • Reserve a slope of 3‰-5‰ according to industry standards, that is, the end of each meter of pipe needs to be raised by 3-5 mm. For example, the end of a 1-meter-long pipe should be 3-5 mm higher than the starting point to ensure smooth drainage without water accumulation.

3. Joint Sealing Treatment:

   • All pipe joints should first be sealed with rubber rings, then coated with a layer of waterproof glue, and finally wrapped with 2 layers of waterproof tape to form triple protection and prevent joint looseness or leakage.

4. Test and Acceptance:

   • Immediately conduct a water filling test after the construction is completed: pour 1 bucket of water (about 10 L) into the floor drain, observe whether the drainage speed is smooth and whether there is water accumulation on the floor; check whether all joints leak after 15 minutes. If problems are found, the joints need to be resealed or the slope adjusted. After confirmation, proceed with the next construction steps (such as tiling and backfilling).

Tip: Floor drain relocation involves concealed work. It is recommended to be operated by a professional plumber and keep construction photos or videos for later maintenance and troubleshooting.