What is the minimum size of a water supply inlet for a bidet?

The minimum size of a water supply inlet for a bidet is typically 1/2 inch. This size is sufficient to provide an adequate flow of water for the proper operation of the bidet while ensuring it can connect to standard plumbing fixtures commonly found in residential settings. The 1/2 inch inlet is a widely accepted standard that balances performance and compatibility with existing water supply lines, allowing for efficient water delivery without causing excessive pressure loss.

Other sizes may provide higher flow rates or accommodate specific high-demand situations, but for the general use of standard bidets, a 1/2 inch inlet is adequate and practical.