@@seastar0222 Big 6's standards - either 30cm or 40cm. The floor hole was drilled for 30 cm, should have bought a toilet that fit the existing hole and not use one that does not fit and inflict damages on it to adapt it to the hole. This stupid way of doing things is just going to make it fail much earlier than it should. A toilet installed in a proper way can easily last for 20-30 years without any problems. This owner would be lucky it it does not leak within 10 years.