What should be verified before installing a plumbing fixture?

Verifying compatibility with the water supply and drainage is crucial before installing a plumbing fixture because it ensures that the fixture will function correctly within the existing plumbing system. This includes checking that the fixture can connect appropriately to the water supply lines and that it aligns with the drainage system, preventing potential leaks or blockages.

If a fixture is not compatible with the existing plumbing, it can lead to significant issues such as water waste, improper drainage, or even damage to the plumbing infrastructure, which can result in costly repairs and modifications. Thus, ensuring this compatibility is fundamental for a successful and long-lasting installation. Other factors like color, brand, or price may be relevant to the selection of a fixture, but they do not impact the functionality and efficiency of the plumbing system itself.