How to Move the Position of the Toilet Pipe

The position of the toilet pipe can be moved by using a pipe shifter, raising the floor and installing a water trap, or cutting a hole in the floor slab, depending on the moving distance and site conditions.

I. Minor Adjustment within 15cm: Use a Pipe Shifter

A pipe shifter is a plastic pipe with a slope used to connect the toilet's sewage outlet to the main pipe, suitable for short-distance adjustments. Installation Points:

1. Timing of Construction: It must be completed before tiling; otherwise, tiles will need to be cut or the floor will need to be刨地 (shaved down) and raised, increasing construction difficulty.
2. Slope Control: A steeper slope ensures smoother drainage and less odor, but it will result in a floor that is "lower in the front and higher in the back." Communicate with the tiler in advance to adjust the tile-laying method accordingly.
3. Length Selection: Pipe shifters come in different specifications. Measure the distance between the original sewage outlet and the center of the downpipe, and prioritize selecting a slightly longer model to avoid affecting the seal due to later cutting.

II. Moving Beyond 15cm: Two Options

Option 1: Raise the Floor + Install a Water Trap

1. Height to Raise: The standard drainage pipe has a diameter of 110mm, and it needs to be raised by at least 120mm to ensure the pipe can bend without clogging; adding a cement mortar leveling layer, the actual height to be raised is about 15cm.
2. Function of the Water Trap: To prevent foul odors from flowing back, the water seal height must be maintained at ≥50mm; otherwise, it is prone to odor issues.
3. Applicable Scenarios: Suitable for bathrooms that are not sensitive to floor height, but it will reduce the floor-to-ceiling height, requiring a trade-off in space utilization.

Option 2: Cut a Hole in the Floor Slab (Requires Professional Assessment)

1. Restrictions: Only feasible when the floor's load-bearing capacity allows, the waterproof layer is intact, and the downstairs neighbor agrees.
2. Construction Steps:
   • Cut a 110mm circular hole in the floor slab above the original drainage pipe, and lay the new pipe along the wall to achieve zero floor elevation.
   • Advantages: Aesthetically pleasing and no slope restrictions; Disadvantages: Requires coordination with neighbors, and the floor slab structure must be sturdy.
3. Safety Tips: It must be positioned by a professional plumber and electrician. An error exceeding 1cm may puncture the steel bars, leaving structural safety hazards.

III. General Operating Steps

1. Clean the Base Layer: Remove the glass glue from the floor and clean up debris.
2. Pipe Connection:
   • Use a Z-shaped elbow, insert one end into the downpipe and the other end into the toilet, mark the dimensions, and then cut the tiles.
   • After cutting, use an electric hammer to clean up the debris to avoid damaging the original pipe.
3. Bonding and Fixing:
   • Apply PVC glue evenly inside and outside the pipe, and press the connection tightly to ensure a seal.
   • If the length is insufficient, adjust it with a cutting machine and re-bond it.
4. Sealing Treatment: When cutting the sewage pipe, a sealing ring must be fitted. After applying glue, measure the length to ensure there is no risk of leakage.

Tip: Moving the position involves the core structure of the drainage system. It is recommended to consult the property management or a professional plumber and electrician first to avoid blockages or leaks due to improper operation.