What type of orifice should every drinking fountain bubbler have?

Every drinking fountain bubbler should utilize a shielded type orifice. The reason for this requirement is to prevent contamination of the drinking water. The shielded design provides a barrier that protects the water outlet from exterior contaminants such as dirt, debris, and microorganisms, thereby ensuring the water remains safe to drink.

Using a shielded type orifice helps maintain the hygiene of the drinking station, which is particularly essential in public settings where multiple users access the fountain. It effectively minimizes the risk of splash-back and reduces the likelihood of any foreign substances entering the water stream, supporting public health standards.

Other types of orifices, such as open or unprotected types, do not provide the same level of protection against contamination, while adjustable types may not be suited for fixed drinking fountains, as they can complicate maintenance and reliability. Therefore, the shielded design is crucial for ensuring the safety and quality of drinking water in public fountains.