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What to Do If Your Toilet Rough-In is Only 280mm: Solutions and Tips

12/02/2025 | Hawkrown

In real life, what should we do if the distance of the toilet flange is only 280 mm when installing a toilet?

What to Do If the Toilet Rough-In Is Only 280mm

If the toilet rough-in is only 280mm, one option is to cut away part of the wall and build it inwards by 20mm, which would make it easier to install the toilet. The rough-in gap of 280mm refers to the distance from the center of the toilet’s drain pipe to the wall, whereas most toilets require a distance of approximately 300mm from the wall.

How to Measure Toilet Rough-In

1、When measuring the rough-in, you should measure from the interior of the drain pipe to the wall, not from the edge of the drain pipe. Starting from the edge will result in inaccurate measurements. Although developers typically provide the rough-in dimensions, there could be differences when tiling the bathroom walls during renovation, leading to discrepancies. Therefore, it's advisable to measure the rough-in yourself before purchasing a toilet.

2、If the rough-in distance is too large, one way to address this is to build a wall behind the toilet, thus preventing the rough-in from being excessively large. Alternatively, you could opt for a wall-hung toilet, but you'll need to ensure the toilet is acquired first, and the water tank should be installed within the wall for proper installation.

3、In cases where the rough-in measurement shows a discrepancy compared to standard toilet rough-ins, minor differences of a few centimeters might not have a significant effect. However, if the discrepancy is too large, the toilet may not be able to be installed against the wall. Therefore, when renovating, it is essential to reserve enough space for the toilet to ensure a satisfactory overall outcome once the renovation is complete.

In summary:the above content outlines what to do if the toilet rough-in is only 280mm. I hope this information is helpful. If you want to know more about how to address this situation, you can refer to the suggested methods. For more information, please continue to follow our platform.

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